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Radiation zone

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4479: 2962: 20: 372:) within a given layer of a star are important factors in determining how effective radiative diffusion is at transporting energy. A high opacity or high luminosity can cause a high temperature gradient, which results from a slow flow of energy. Those layers where convection is more effective than radiative diffusion at transporting energy, thereby creating a lower temperature gradient, will become 4490: 1166: 2084:
with mass, with stars around 1.2 solar masses being almost entirely radiative. Above 1.2 solar masses, the core region becomes a convection zone and the overlying region is a radiation zone, with the amount of mass within the convective zone increasing with the mass of the star.
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Matter in a radiation zone is so dense that photons can travel only a short distance before they are absorbed or scattered by another particle, gradually shifting to longer wavelength as they do so. For this reason, it takes an average of 171,000 years for
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are entirely convective, meaning they do not have a radiative zone. From 0.3 to 1.2 solar masses, the region around the stellar core is a radiation zone, separated from the overlying convection zone by the
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from the core of the Sun to leave the radiation zone. Over this range, the temperature of the plasma drops from 15 million K near the core down to 1.5 million K at the base of the convection zone.
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For energy transmission by radiation only, we may use the equation for the temperature gradient (presented in the previous subsection) for the right-hand side and get
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We can calculate the left-hand side by dividing the equation for the temperature gradient by the equation relating the pressure gradient to the gravity acceleration
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and μ the mass of a single atom (actually, an ion since matter is ionized; usually a hydrogen ion, i.e. a proton). While the radiation pressure satisfies:
1161:{\displaystyle -{\frac {GM\rho }{r^{2}}}={\frac {{\text{d}}P}{{\text{d}}r}}={\frac {16\sigma _{B}}{3c(1-\beta )}}T^{3}{\frac {{\text{d}}T}{{\text{d}}r}}} 1933:) is small, if nuclear energy production is strongly peaked at the center, as in relatively massive stars. Thus such stars have a convective core. 2071:
of hydrogen at the core, the presence and location of radiative regions depends on the star's mass. Main sequence stars below about 0.3
1872:; in the sun, opacity increases by more than a tenfold across the radiation zone, before the transition to the convection zone happens. 2054:. Therefore, all stars have shallow convection zones near their surfaces, at low enough temperatures where ionization is only partial. 399: 313:{\displaystyle {\frac {{\text{d}}T(r)}{{\text{d}}r}}\ =\ -{\frac {3\kappa (r)\rho (r)L(r)}{(4\pi r^{2})(16\sigma _{B})T^{3}(r)}}} 2302:
Turck-ChiĂšze, Sylvaine; Couvidat, SĂ©bastien (2011-08-01). "Solar neutrinos, helioseismology and the solar internal dynamics".
380: 4362: 2386: 2208: 2173: 2146: 1181: 494: 2492: 1764:{\displaystyle {\frac {3}{64\pi \sigma _{B}\,G}}{\frac {\kappa \,L}{M}}{\frac {P}{T^{4}}}<1-{\frac {1}{\gamma _{ad}}}} 996:{\displaystyle P=\left({\frac {3ck_{B}^{4}}{4\sigma _{B}\mu ^{4}}}{\frac {1-\beta }{\beta ^{4}}}\right)^{1/3}\rho ^{4/3}} 655: 552: 4337: 3656: 826:{\displaystyle 1-\beta ={\frac {P_{\text{radiation}}}{P}}={\frac {u}{3P}}={\frac {4\sigma _{B}}{3c}}{\frac {T^{4}}{P}}} 2786: 2472: 2101:
at 0.71 of the Sun's radius is referred to as the radiation zone, although the core is also a radiative region. The
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if the density gradient is high enough, so that an element moving upwards has its density lowered (due to
4313: 4293: 3676: 104:, is a layer of a star's interior where energy is primarily transported toward the exterior by means of 4377: 4308: 4278: 2745: 2438: 1864:
However, at a large enough radius, the opacity κ increases due to the decrease in temperature (by
1626:{\displaystyle {\frac {{\text{d}}P(r)}{{\text{d}}r}}\ =\ g\rho \ =\ {\frac {G\,M(r)\,\rho (r)}{r^{2}}}} 4384: 4261: 4238: 3820: 3269: 3264: 3259: 3254: 3249: 3244: 2923: 2247: 1360:{\displaystyle {\frac {{\text{d}}\,\log \,\rho }{{\text{d}}\,\log \,P}}>{\frac {1}{\gamma _{ad}}}} 117: 3527: 3401: 3036: 1495:{\displaystyle {\frac {{\text{d}}\,\log \,T}{{\text{d}}\,\log \,P}}<1-{\frac {1}{\gamma _{ad}}}} 483: 1969: 1966:. For semi-ionized gas, where approximately half of the atoms are ionized, the effective value of 1939: 1379: 4303: 4054: 3853: 3763: 3723: 3705: 3631: 3202: 3128: 2618: 1865: 1655: 1009: 31: 4464: 4444: 4216: 4211: 4109: 4004: 3953: 3758: 3748: 3421: 3219: 3187: 3078: 3061: 2917: 2760: 2653: 1882: 388: 2198: 4318: 4288: 4283: 4273: 4201: 3989: 3155: 2813: 2633: 2465: 2432: 2376: 2163: 2136: 472: 3436: 4459: 4357: 4347: 4196: 4164: 3958: 3753: 3738: 3051: 2897: 2867: 2750: 2685: 2502: 2321: 2266: 2068: 1777: 8: 3919: 3902: 3573: 3475: 3298: 2717: 1407: 4059: 2333: 2325: 2270: 4454: 4415: 4367: 4352: 4266: 4206: 4129: 4039: 4009: 3999: 3943: 3865: 3556: 3192: 2991: 2803: 2535: 2311: 2256: 2081: 1268: 716: 640: 109: 4405: 3830: 3803: 3783: 3583: 3367: 3355: 3182: 3162: 3116: 3098: 3066: 2937: 2852: 2755: 2382: 2345: 2337: 2284: 2279: 2242: 2204: 2179: 2169: 2142: 1281:) less than the drop in density of its surrounding, so that it will experience a net 1278: 3890: 2658: 4233: 4186: 4136: 4124: 4102: 4097: 4024: 3984: 3931: 3713: 3636: 3611: 3505: 3426: 3150: 3111: 2643: 2552: 2458: 2329: 2274: 625: 332: 81: 4420: 4223: 4092: 3936: 3907: 3848: 3843: 3718: 3446: 3411: 3345: 3291: 3286: 3231: 3041: 2877: 2857: 2832: 2727: 2672: 2648: 2525: 2407: 2102: 2098: 1869: 1274: 373: 51: 4482: 4248: 4087: 3914: 3885: 3793: 3482: 3350: 3236: 3138: 3028: 3018: 2847: 2827: 2822: 2610: 610: 4509: 4434: 4228: 4191: 4159: 4034: 3743: 3566: 3537: 3515: 3133: 3106: 3083: 2984: 2892: 2887: 2862: 2791: 2781: 2702: 2697: 2692: 2595: 2572: 2557: 2341: 2288: 2064: 1800: 1248: 644: 2183: 1780:, because the density gradient now also depends on concentration gradients. 387:, giving the total outgoing energy flux which is equal to the luminosity by 4515: 4494: 4169: 4119: 4114: 4014: 3897: 3880: 3838: 3808: 3798: 3733: 3616: 3561: 3542: 3522: 3500: 3492: 3335: 3328: 3167: 3088: 3071: 2965: 2872: 2842: 2837: 2798: 2628: 2623: 2600: 2582: 2562: 2349: 71: 46: 1799:
and the left-hand side is constant and equals 1/4, smaller than the ideal
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Animated explanation of the temperature and density of the Radiation zone
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Note that for non-homogenic gas this criterion should be replaced by the
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In a radiative zone, the temperature gradient—the change in temperature (
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Additional situations in which this stability criterion is not met are:
1861:. This explains the stability of the radiation zone against convection. 3994: 3691: 3664: 3641: 3621: 3606: 3458: 3362: 3340: 3318: 3313: 3177: 2882: 2712: 2520: 2510: 2106: 2094: 2077: 2072: 113: 86: 66: 61: 4181: 4029: 3813: 3778: 3773: 3768: 3728: 3681: 3671: 3465: 3441: 3416: 3323: 3274: 3207: 3197: 3172: 3145: 3121: 3056: 2765: 2638: 1784: 1414: 848: 636: 129: 105: 2243:"Solar opacity calculations using the super-transition-array method" 4174: 3875: 3549: 3308: 3281: 2907: 2261: 1282: 629: 2424: 2316: 4449: 3924: 3686: 3453: 3406: 3389: 3384: 3303: 2567: 36: 455:{\displaystyle L=-4\pi \,r^{2}D{\frac {\partial u}{\partial r}}} 4439: 4427: 3646: 3532: 1251:
is a good approximation in the radiation zone as long as κ
121: 2381:. Vol. 2. Cambridge: Cambridge Univ. Press. p. 80. 19: 1647:, and is approximately the whole star mass for large enough 3788: 3007: 2902: 2428: 1791:=3 (as in the Eddington stellar model for radiation zone), 116:. Energy travels through the radiation zone in the form of 4489: 2450: 2161: 4154: 2481: 2168:. The solar system. New York: Chelsea House. p. 24. 2162:
Elkins-Tanton, Linda T.; Elkins-Tanton, Linda T. (2006).
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stars—those stars that are generating energy through the
1925:, which may happen towards the star core's center, where 24: 2976: 1235:{\displaystyle GM={\frac {\kappa L}{4\pi c(1-\beta )}}} 2378:
Theoretical astrophysics. 2: Stars and stellar systems
2141:. Cambridge: Cambridge University Press. p. 19. 2002: 1972: 1942: 1885: 1809: 1669: 1520: 1428: 1382: 1299: 1184: 1023: 1012:
equation, the second equation becomes equivalent to:
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is approximately constant, which is often the case.
539:{\displaystyle U={\frac {4}{c}}\,\sigma _{B}\,T^{4}} 482:
The energy density is related to the temperature by
694:{\displaystyle \beta P=k_{B}{\frac {\rho }{\mu }}T} 553:
elementary theory of diffusion coefficient in gases
2203:(1st ed.). John Wiley and Sons. p. 168. 2046: 1988: 1958: 1917: 1853: 1763: 1625: 1494: 1398: 1359: 1273:The radiation zone is stable against formation of 1234: 1160: 995: 825: 693: 596: 538: 454: 312: 2130: 2128: 2126: 4507: 2240: 2155: 2241:Krief, M.; Feigel, A.; Gazit, D. (2016-04-10). 1262: 2368: 2123: 2992: 2466: 2080:. The radius of the radiative zone increases 1803:approximation for the right-hand side giving 1643:) being the mass within the sphere of radius 379:This relation can be derived by integrating 2374: 597:{\displaystyle D={\frac {1}{3}}c\,\lambda } 2999: 2985: 2473: 2459: 2439:Animated explanation of the Radiation zone 2224: 2222: 2220: 2190: 2134: 2105:and the radiation zone are divided by the 620: 2315: 2278: 2260: 2135:Ryan, Sean G.; Norton, Andrew J. (2010). 2097:at 0.2 of the Sun's radius and the outer 1705: 1692: 1597: 1584: 1456: 1452: 1441: 1437: 1327: 1323: 1312: 1308: 590: 525: 514: 418: 1376:is the pressure, ρ the density and 23:An illustration of the structure of the 18: 2217: 2200:An Introduction to Stellar Astrophysics 2196: 2116: 613:, and is the reciprocal of the opacity 135: 4508: 2058: 2980: 2454: 2138:Stellar evolution and nucleosynthesis 1654:This gives the following form of the 2405: 2362: 2228: 2047:{\displaystyle 1-1/\gamma _{ad}=1/6} 1854:{\displaystyle 1-1/\gamma _{ad}=2/5} 2093:In the Sun, the region between the 13: 2425:Solar and Heliospheric Observatory 2399: 1658:for stability against convection: 443: 435: 14: 4527: 2418: 2412:. Astronomical Institute Utrecht. 635:in a star is a combination of an 4488: 4478: 4477: 2961: 2960: 383:over the surface of some radius 2409:Stellar Structure and Evolution 2356: 2304:Reports on Progress in Physics 2295: 2234: 1912: 1906: 1895: 1889: 1607: 1601: 1594: 1588: 1538: 1532: 1226: 1214: 1118: 1106: 304: 298: 285: 269: 266: 247: 242: 236: 230: 224: 218: 212: 175: 169: 1: 4390:Timeline of stellar astronomy 2943:List of heliophysics missions 2334:10.1088/0034-4885/74/8/086901 2948:Category:Missions to the Sun 2447:(University of South Wales). 2441:(University of South Wales). 1989:{\displaystyle \gamma _{ad}} 1959:{\displaystyle \gamma _{ad}} 1399:{\displaystyle \gamma _{ad}} 1263:Stability against convection 555:, the diffusion coefficient 7: 4050:Hertzsprung–Russell diagram 2480: 2375:Padmanabhan, Thanu (2001). 2165:The Sun, Mercury, and Venus 1288:The criterion for this is: 609:where λ is the photon 144:) as a function of radius ( 10: 4532: 3964:Kelvin–Helmholtz mechanism 2406:Pols, Onno Rudolf (2011). 2280:10.3847/0004-637X/821/1/45 2088: 1266: 4473: 4398: 4247: 4145: 4073: 3972: 3829: 3704: 3582: 3491: 3227: 3218: 3097: 3027: 3014: 3006: 2956: 2930: 2924:G-type main-sequence star 2916: 2774: 2736: 2671: 2609: 2581: 2543: 2534: 2501: 2488: 2248:The Astrophysical Journal 2197:LeBlanc, Francis (2010). 1918:{\displaystyle L(r)/M(r)} 1417:, this is equivalent to: 559:approximately satisfies: 362:Stefan–Boltzmann constant 351:) is the luminosity, and 343:) is the matter density, 118:electromagnetic radiation 4343:With multiple exoplanets 2787:In mythology and culture 2427:— official site of this 16:Radiative layer of stars 3129:Asymptotic giant branch 1656:Schwarzschild criterion 1010:hydrostatic equilibrium 621:Eddington stellar model 479:is the energy density. 4465:Tidal disruption event 3954:Circumstellar envelope 3188:Luminous blue variable 2654:Supra-arcade downflows 2109:, another part of the 2048: 1990: 1960: 1919: 1855: 1765: 1627: 1496: 1400: 1361: 1236: 1162: 997: 827: 695: 598: 540: 456: 389:conservation of energy 368:) and radiation flux ( 314: 93: 3990:Effective temperature 2634:Coronal mass ejection 2049: 1996:drops to 6/5, giving 1991: 1961: 1920: 1856: 1766: 1628: 1497: 1401: 1362: 1237: 1163: 998: 844:throughout the star. 828: 696: 599: 541: 473:diffusion coefficient 457: 364:. Hence the opacity ( 315: 22: 4460:Planet-hosting stars 4338:With resolved images 4309:Historical brightest 4239:Photometric-standard 4165:Solar radio emission 3959:Eddington luminosity 3739:Triple-alpha process 3677:Thorne–ƻytkow object 3052:Young stellar object 2898:Standard solar model 2868:Solar radio emission 2686:List of solar cycles 2117:Notes and references 2069:thermonuclear fusion 2000: 1970: 1940: 1883: 1866:Kramers' opacity law 1807: 1667: 1518: 1426: 1380: 1297: 1182: 1021: 864: 726: 656: 568: 495: 484:Stefan–Boltzmann law 400: 155: 136:Temperature gradient 4284:Highest temperature 4055:Color–color diagram 3920:Protoplanetary disk 3724:Proton–proton chain 3402:Chemically peculiar 2718:Magnetic switchback 2326:2011RPPh...74h6901T 2271:2016ApJ...821...45K 2059:Main sequence stars 1936:A smaller value of 1795:is proportional to 1408:heat capacity ratio 1279:adiabatic expansion 1247:Thus the Eddington 902: 840:is proportional to 551:Finally, as in the 106:radiative diffusion 4289:Lowest temperature 4040:Photometric system 4010:Absolute magnitude 3944:Circumstellar dust 3557:Stellar black hole 3193:Stellar population 3079:Herbig–Haro object 2908:Sunlight radiation 2503:Internal structure 2044: 1986: 1956: 1915: 1851: 1761: 1623: 1492: 1396: 1357: 1269:Natural convection 1232: 1158: 993: 888: 823: 717:Boltzmann constant 691: 641:radiation pressure 594: 536: 452: 310: 110:thermal conduction 94: 4503: 4502: 4406:Substellar object 4385:Planetary nebulae 3804:Luminous red nova 3714:Deuterium burning 3700: 3699: 3183:Instability strip 3163:Wolf-Rayet nebula 3117:Horizontal branch 3062:Pre-main-sequence 2974: 2973: 2938:Solar observatory 2853:Solar observation 2751:Termination shock 2667: 2666: 2619:Transition region 2388:978-0-521-56631-5 2210:978-1-119-96497-1 2175:978-0-8160-5193-9 2148:978-0-521-19609-3 1759: 1730: 1713: 1697: 1621: 1577: 1571: 1562: 1556: 1552: 1546: 1527: 1490: 1461: 1450: 1435: 1355: 1332: 1321: 1306: 1285:force downwards. 1230: 1156: 1150: 1140: 1122: 1077: 1071: 1061: 1050: 954: 929: 821: 804: 774: 756: 750: 686: 585: 512: 450: 308: 199: 193: 189: 183: 164: 112:, rather than by 4523: 4495:Stars portal 4493: 4492: 4481: 4480: 4137:Planetary system 4060:Strömgren sphere 3932:Asteroseismology 3653:Black hole star 3225: 3224: 3151:Planetary nebula 3112:Red-giant branch 3001: 2994: 2987: 2978: 2977: 2964: 2963: 2553:Supergranulation 2541: 2540: 2475: 2468: 2461: 2452: 2451: 2413: 2393: 2392: 2372: 2366: 2360: 2354: 2353: 2319: 2299: 2293: 2292: 2282: 2264: 2238: 2232: 2231:, pp. 64–68 2226: 2215: 2214: 2194: 2188: 2187: 2159: 2153: 2152: 2132: 2053: 2051: 2050: 2045: 2040: 2029: 2028: 2016: 1995: 1993: 1992: 1987: 1985: 1984: 1965: 1963: 1962: 1957: 1955: 1954: 1924: 1922: 1921: 1916: 1902: 1879:Large values of 1860: 1858: 1857: 1852: 1847: 1836: 1835: 1823: 1778:Ledoux criterion 1770: 1768: 1767: 1762: 1760: 1758: 1757: 1742: 1731: 1729: 1728: 1716: 1714: 1709: 1700: 1698: 1696: 1691: 1690: 1671: 1632: 1630: 1629: 1624: 1622: 1620: 1619: 1610: 1579: 1575: 1569: 1560: 1554: 1553: 1551: 1547: 1544: 1541: 1528: 1525: 1522: 1501: 1499: 1498: 1493: 1491: 1489: 1488: 1473: 1462: 1460: 1451: 1448: 1445: 1436: 1433: 1430: 1413:For a homogenic 1405: 1403: 1402: 1397: 1395: 1394: 1366: 1364: 1363: 1358: 1356: 1354: 1353: 1338: 1333: 1331: 1322: 1319: 1316: 1307: 1304: 1301: 1275:convection cells 1241: 1239: 1238: 1233: 1231: 1229: 1203: 1195: 1167: 1165: 1164: 1159: 1157: 1155: 1151: 1148: 1145: 1141: 1138: 1135: 1133: 1132: 1123: 1121: 1098: 1097: 1096: 1083: 1078: 1076: 1072: 1069: 1066: 1062: 1059: 1056: 1051: 1049: 1048: 1039: 1028: 1002: 1000: 999: 994: 992: 991: 987: 974: 973: 969: 960: 956: 955: 953: 952: 943: 932: 930: 928: 927: 926: 917: 916: 903: 901: 896: 880: 832: 830: 829: 824: 822: 817: 816: 807: 805: 803: 795: 794: 793: 780: 775: 773: 762: 757: 752: 751: 748: 742: 700: 698: 697: 692: 687: 679: 677: 676: 603: 601: 600: 595: 586: 578: 545: 543: 542: 537: 535: 534: 524: 523: 513: 505: 461: 459: 458: 453: 451: 449: 441: 433: 428: 427: 381:Fick's first law 374:convection zones 319: 317: 316: 311: 309: 307: 297: 296: 284: 283: 265: 264: 245: 204: 197: 191: 190: 188: 184: 181: 178: 165: 162: 159: 102:radiative region 4531: 4530: 4526: 4525: 4524: 4522: 4521: 4520: 4506: 4505: 4504: 4499: 4487: 4469: 4394: 4363:Milky Way novae 4299:Smallest volume 4243: 4224:Radial velocity 4147: 4141: 4093:Common envelope 4069: 3968: 3937:Helioseismology 3908:Bipolar outflow 3849:Microturbulence 3844:Convection zone 3825: 3719:Lithium burning 3706:Nucleosynthesis 3696: 3578: 3487: 3214: 3093: 3042:Molecular cloud 3023: 3010: 3005: 2975: 2970: 2952: 2926: 2912: 2878:Solar telescope 2858:Solar phenomena 2833:Solar astronomy 2770: 2732: 2728:Helioseismology 2663: 2649:Helmet streamer 2605: 2577: 2530: 2526:Convection zone 2497: 2484: 2479: 2421: 2402: 2400:Further reading 2397: 2396: 2389: 2373: 2369: 2361: 2357: 2300: 2296: 2239: 2235: 2227: 2218: 2211: 2195: 2191: 2176: 2160: 2156: 2149: 2133: 2124: 2119: 2103:convection zone 2099:convection zone 2091: 2061: 2036: 2021: 2017: 2012: 2001: 1998: 1997: 1977: 1973: 1971: 1968: 1967: 1947: 1943: 1941: 1938: 1937: 1898: 1884: 1881: 1880: 1870:convection zone 1843: 1828: 1824: 1819: 1808: 1805: 1804: 1750: 1746: 1741: 1724: 1720: 1715: 1701: 1699: 1686: 1682: 1675: 1670: 1668: 1665: 1664: 1615: 1611: 1580: 1578: 1543: 1542: 1524: 1523: 1521: 1519: 1516: 1515: 1481: 1477: 1472: 1447: 1446: 1432: 1431: 1429: 1427: 1424: 1423: 1387: 1383: 1381: 1378: 1377: 1346: 1342: 1337: 1318: 1317: 1303: 1302: 1300: 1298: 1295: 1294: 1271: 1265: 1204: 1196: 1194: 1183: 1180: 1179: 1147: 1146: 1137: 1136: 1134: 1128: 1124: 1099: 1092: 1088: 1084: 1082: 1068: 1067: 1058: 1057: 1055: 1044: 1040: 1029: 1027: 1022: 1019: 1018: 983: 979: 975: 965: 961: 948: 944: 933: 931: 922: 918: 912: 908: 904: 897: 892: 881: 879: 878: 874: 873: 865: 862: 861: 851:equation (with 847:This gives the 812: 808: 806: 796: 789: 785: 781: 779: 766: 761: 747: 743: 741: 727: 724: 723: 714: 678: 672: 668: 657: 654: 653: 623: 577: 569: 566: 565: 530: 526: 519: 515: 504: 496: 493: 492: 471:is the photons 442: 434: 432: 423: 419: 401: 398: 397: 359: 292: 288: 279: 275: 260: 256: 246: 205: 203: 180: 179: 161: 160: 158: 156: 153: 152: 148:)—is given by: 138: 92: 91: 52:Convection zone 17: 12: 11: 5: 4529: 4519: 4518: 4501: 4500: 4498: 4497: 4485: 4474: 4471: 4470: 4468: 4467: 4462: 4457: 4452: 4447: 4442: 4437: 4432: 4431: 4430: 4425: 4424: 4423: 4418: 4402: 4400: 4396: 4395: 4393: 4392: 4387: 4382: 4381: 4380: 4375: 4365: 4360: 4355: 4350: 4345: 4340: 4335: 4334: 4333: 4328: 4327: 4326: 4316: 4311: 4306: 4301: 4296: 4294:Largest volume 4291: 4286: 4281: 4271: 4270: 4269: 4264: 4253: 4251: 4245: 4244: 4242: 4241: 4236: 4231: 4226: 4221: 4220: 4219: 4214: 4209: 4199: 4194: 4189: 4184: 4179: 4178: 4177: 4172: 4167: 4162: 4151: 4149: 4143: 4142: 4140: 4139: 4134: 4133: 4132: 4127: 4122: 4112: 4107: 4106: 4105: 4100: 4095: 4090: 4079: 4077: 4071: 4070: 4068: 4067: 4062: 4057: 4052: 4047: 4042: 4037: 4032: 4027: 4022: 4017: 4012: 4007: 4005:Magnetic field 4002: 3997: 3992: 3987: 3982: 3976: 3974: 3970: 3969: 3967: 3966: 3961: 3956: 3951: 3946: 3941: 3940: 3939: 3929: 3928: 3927: 3922: 3915:Accretion disk 3912: 3911: 3910: 3905: 3895: 3894: 3893: 3891:AlfvĂ©n surface 3888: 3886:Stellar corona 3883: 3878: 3873: 3863: 3861:Radiation zone 3858: 3857: 3856: 3851: 3841: 3835: 3833: 3827: 3826: 3824: 3823: 3818: 3817: 3816: 3811: 3806: 3801: 3796: 3786: 3781: 3776: 3771: 3766: 3761: 3756: 3751: 3746: 3741: 3736: 3731: 3726: 3721: 3716: 3710: 3708: 3702: 3701: 3698: 3697: 3695: 3694: 3689: 3684: 3679: 3674: 3669: 3668: 3667: 3662: 3659: 3651: 3650: 3649: 3644: 3639: 3634: 3629: 3624: 3619: 3614: 3609: 3599: 3594: 3588: 3586: 3580: 3579: 3577: 3576: 3571: 3570: 3569: 3559: 3554: 3553: 3552: 3547: 3546: 3545: 3540: 3530: 3520: 3519: 3518: 3508: 3503: 3497: 3495: 3489: 3488: 3486: 3485: 3483:Blue straggler 3480: 3479: 3478: 3468: 3463: 3462: 3461: 3451: 3450: 3449: 3444: 3439: 3434: 3429: 3424: 3419: 3414: 3409: 3399: 3394: 3393: 3392: 3387: 3382: 3372: 3371: 3370: 3360: 3359: 3358: 3353: 3348: 3338: 3333: 3332: 3331: 3326: 3321: 3311: 3306: 3301: 3296: 3295: 3294: 3289: 3279: 3278: 3277: 3272: 3267: 3262: 3257: 3252: 3247: 3241:Main sequence 3239: 3234: 3228: 3222: 3220:Classification 3216: 3215: 3213: 3212: 3211: 3210: 3205: 3195: 3190: 3185: 3180: 3175: 3170: 3165: 3160: 3159: 3158: 3156:Protoplanetary 3148: 3143: 3142: 3141: 3136: 3126: 3125: 3124: 3114: 3109: 3103: 3101: 3095: 3094: 3092: 3091: 3086: 3081: 3076: 3075: 3074: 3069: 3064: 3059: 3049: 3044: 3039: 3033: 3031: 3025: 3024: 3022: 3021: 3015: 3012: 3011: 3004: 3003: 2996: 2989: 2981: 2972: 2971: 2969: 2968: 2957: 2954: 2953: 2951: 2950: 2945: 2940: 2934: 2932: 2928: 2927: 2922: 2920: 2918:Spectral class 2914: 2913: 2911: 2910: 2905: 2900: 2895: 2890: 2885: 2880: 2875: 2870: 2865: 2860: 2855: 2850: 2848:Solar neutrino 2845: 2840: 2835: 2830: 2828:Solar activity 2825: 2823:Sun in fiction 2820: 2819: 2818: 2817: 2816: 2801: 2796: 2795: 2794: 2789: 2778: 2776: 2772: 2771: 2769: 2768: 2763: 2758: 2753: 2748: 2742: 2740: 2734: 2733: 2731: 2730: 2725: 2720: 2715: 2710: 2705: 2700: 2695: 2690: 2689: 2688: 2677: 2675: 2669: 2668: 2665: 2664: 2662: 2661: 2659:AlfvĂ©n surface 2656: 2651: 2646: 2641: 2636: 2631: 2626: 2621: 2615: 2613: 2607: 2606: 2604: 2603: 2598: 2593: 2587: 2585: 2579: 2578: 2576: 2575: 2570: 2565: 2560: 2555: 2549: 2547: 2538: 2532: 2531: 2529: 2528: 2523: 2518: 2516:Radiation zone 2513: 2507: 2505: 2499: 2498: 2496: 2495: 2489: 2486: 2485: 2478: 2477: 2470: 2463: 2455: 2449: 2448: 2442: 2436: 2435:joint project. 2420: 2419:External links 2417: 2416: 2415: 2401: 2398: 2395: 2394: 2387: 2367: 2355: 2294: 2233: 2216: 2209: 2189: 2174: 2154: 2147: 2121: 2120: 2118: 2115: 2090: 2087: 2060: 2057: 2056: 2055: 2043: 2039: 2035: 2032: 2027: 2024: 2020: 2015: 2011: 2008: 2005: 1983: 1980: 1976: 1953: 1950: 1946: 1934: 1914: 1911: 1908: 1905: 1901: 1897: 1894: 1891: 1888: 1850: 1846: 1842: 1839: 1834: 1831: 1827: 1822: 1818: 1815: 1812: 1787:solution with 1774: 1773: 1772: 1771: 1756: 1753: 1749: 1745: 1740: 1737: 1734: 1727: 1723: 1719: 1712: 1708: 1704: 1695: 1689: 1685: 1681: 1678: 1674: 1634: 1633: 1618: 1614: 1609: 1606: 1603: 1600: 1596: 1593: 1590: 1587: 1583: 1574: 1568: 1565: 1559: 1550: 1540: 1537: 1534: 1531: 1505: 1504: 1503: 1502: 1487: 1484: 1480: 1476: 1471: 1468: 1465: 1459: 1455: 1444: 1440: 1393: 1390: 1386: 1370: 1369: 1368: 1367: 1352: 1349: 1345: 1341: 1336: 1330: 1326: 1315: 1311: 1264: 1261: 1245: 1244: 1243: 1242: 1228: 1225: 1222: 1219: 1216: 1213: 1210: 1207: 1202: 1199: 1193: 1190: 1187: 1171: 1170: 1169: 1168: 1154: 1144: 1131: 1127: 1120: 1117: 1114: 1111: 1108: 1105: 1102: 1095: 1091: 1087: 1081: 1075: 1065: 1054: 1047: 1043: 1038: 1035: 1032: 1026: 1006: 1005: 1004: 1003: 990: 986: 982: 978: 972: 968: 964: 959: 951: 947: 942: 939: 936: 925: 921: 915: 911: 907: 900: 895: 891: 887: 884: 877: 872: 869: 834: 833: 820: 815: 811: 802: 799: 792: 788: 784: 778: 772: 769: 765: 760: 755: 746: 740: 737: 734: 731: 710: 704: 703: 702: 701: 690: 685: 682: 675: 671: 667: 664: 661: 622: 619: 611:mean free path 607: 606: 605: 604: 593: 589: 584: 581: 576: 573: 549: 548: 547: 546: 533: 529: 522: 518: 511: 508: 503: 500: 465: 464: 463: 462: 448: 445: 440: 437: 431: 426: 422: 417: 414: 411: 408: 405: 355: 321: 320: 306: 303: 300: 295: 291: 287: 282: 278: 274: 271: 268: 263: 259: 255: 252: 249: 244: 241: 238: 235: 232: 229: 226: 223: 220: 217: 214: 211: 208: 202: 196: 187: 177: 174: 171: 168: 137: 134: 98:radiation zone 90: 89: 84: 79: 74: 69: 64: 59: 57:Radiation zone 54: 49: 44: 39: 34: 28: 27: 15: 9: 6: 4: 3: 2: 4528: 4517: 4514: 4513: 4511: 4496: 4491: 4486: 4484: 4476: 4475: 4472: 4466: 4463: 4461: 4458: 4456: 4455:Intergalactic 4453: 4451: 4448: 4446: 4443: 4441: 4438: 4436: 4435:Galactic year 4433: 4429: 4426: 4422: 4419: 4417: 4414: 4413: 4412: 4409: 4408: 4407: 4404: 4403: 4401: 4397: 4391: 4388: 4386: 4383: 4379: 4376: 4374: 4371: 4370: 4369: 4366: 4364: 4361: 4359: 4356: 4354: 4351: 4349: 4346: 4344: 4341: 4339: 4336: 4332: 4329: 4325: 4322: 4321: 4320: 4317: 4315: 4314:Most luminous 4312: 4310: 4307: 4305: 4302: 4300: 4297: 4295: 4292: 4290: 4287: 4285: 4282: 4280: 4277: 4276: 4275: 4272: 4268: 4265: 4263: 4260: 4259: 4258: 4255: 4254: 4252: 4250: 4246: 4240: 4237: 4235: 4232: 4230: 4229:Proper motion 4227: 4225: 4222: 4218: 4215: 4213: 4210: 4208: 4205: 4204: 4203: 4200: 4198: 4195: 4193: 4192:Constellation 4190: 4188: 4185: 4183: 4180: 4176: 4173: 4171: 4168: 4166: 4163: 4161: 4160:Solar eclipse 4158: 4157: 4156: 4153: 4152: 4150: 4146:Earth-centric 4144: 4138: 4135: 4131: 4128: 4126: 4123: 4121: 4118: 4117: 4116: 4113: 4111: 4108: 4104: 4101: 4099: 4096: 4094: 4091: 4089: 4086: 4085: 4084: 4081: 4080: 4078: 4076: 4072: 4066: 4063: 4061: 4058: 4056: 4053: 4051: 4048: 4046: 4043: 4041: 4038: 4036: 4033: 4031: 4028: 4026: 4023: 4021: 4018: 4016: 4013: 4011: 4008: 4006: 4003: 4001: 3998: 3996: 3993: 3991: 3988: 3986: 3983: 3981: 3978: 3977: 3975: 3971: 3965: 3962: 3960: 3957: 3955: 3952: 3950: 3947: 3945: 3942: 3938: 3935: 3934: 3933: 3930: 3926: 3923: 3921: 3918: 3917: 3916: 3913: 3909: 3906: 3904: 3901: 3900: 3899: 3896: 3892: 3889: 3887: 3884: 3882: 3879: 3877: 3874: 3872: 3869: 3868: 3867: 3864: 3862: 3859: 3855: 3852: 3850: 3847: 3846: 3845: 3842: 3840: 3837: 3836: 3834: 3832: 3828: 3822: 3819: 3815: 3812: 3810: 3807: 3805: 3802: 3800: 3797: 3795: 3792: 3791: 3790: 3787: 3785: 3782: 3780: 3777: 3775: 3772: 3770: 3767: 3765: 3762: 3760: 3757: 3755: 3752: 3750: 3747: 3745: 3744:Alpha process 3742: 3740: 3737: 3735: 3732: 3730: 3727: 3725: 3722: 3720: 3717: 3715: 3712: 3711: 3709: 3707: 3703: 3693: 3690: 3688: 3685: 3683: 3680: 3678: 3675: 3673: 3670: 3666: 3663: 3660: 3658: 3655: 3654: 3652: 3648: 3645: 3643: 3640: 3638: 3635: 3633: 3630: 3628: 3625: 3623: 3620: 3618: 3615: 3613: 3610: 3608: 3605: 3604: 3603: 3600: 3598: 3595: 3593: 3590: 3589: 3587: 3585: 3581: 3575: 3572: 3568: 3565: 3564: 3563: 3560: 3558: 3555: 3551: 3548: 3544: 3541: 3539: 3536: 3535: 3534: 3531: 3529: 3526: 3525: 3524: 3521: 3517: 3516:Helium planet 3514: 3513: 3512: 3509: 3507: 3506:Parker's star 3504: 3502: 3499: 3498: 3496: 3494: 3490: 3484: 3481: 3477: 3474: 3473: 3472: 3469: 3467: 3464: 3460: 3457: 3456: 3455: 3452: 3448: 3445: 3443: 3440: 3438: 3437:Lambda Boötis 3435: 3433: 3430: 3428: 3425: 3423: 3420: 3418: 3415: 3413: 3410: 3408: 3405: 3404: 3403: 3400: 3398: 3395: 3391: 3388: 3386: 3383: 3381: 3378: 3377: 3376: 3373: 3369: 3366: 3365: 3364: 3361: 3357: 3354: 3352: 3349: 3347: 3344: 3343: 3342: 3339: 3337: 3334: 3330: 3327: 3325: 3322: 3320: 3317: 3316: 3315: 3312: 3310: 3307: 3305: 3302: 3300: 3297: 3293: 3290: 3288: 3285: 3284: 3283: 3280: 3276: 3273: 3271: 3268: 3266: 3263: 3261: 3258: 3256: 3253: 3251: 3248: 3246: 3243: 3242: 3240: 3238: 3235: 3233: 3230: 3229: 3226: 3223: 3221: 3217: 3209: 3206: 3204: 3203:Superluminous 3201: 3200: 3199: 3196: 3194: 3191: 3189: 3186: 3184: 3181: 3179: 3176: 3174: 3171: 3169: 3166: 3164: 3161: 3157: 3154: 3153: 3152: 3149: 3147: 3144: 3140: 3137: 3135: 3132: 3131: 3130: 3127: 3123: 3120: 3119: 3118: 3115: 3113: 3110: 3108: 3107:Main sequence 3105: 3104: 3102: 3100: 3096: 3090: 3087: 3085: 3084:Hayashi track 3082: 3080: 3077: 3073: 3070: 3068: 3065: 3063: 3060: 3058: 3055: 3054: 3053: 3050: 3048: 3045: 3043: 3040: 3038: 3035: 3034: 3032: 3030: 3026: 3020: 3017: 3016: 3013: 3009: 3002: 2997: 2995: 2990: 2988: 2983: 2982: 2979: 2967: 2959: 2958: 2955: 2949: 2946: 2944: 2941: 2939: 2936: 2935: 2933: 2929: 2925: 2921: 2919: 2915: 2909: 2906: 2904: 2901: 2899: 2896: 2894: 2893:Space weather 2891: 2889: 2888:Space climate 2886: 2884: 2881: 2879: 2876: 2874: 2871: 2869: 2866: 2864: 2863:Solar physics 2861: 2859: 2856: 2854: 2851: 2849: 2846: 2844: 2841: 2839: 2836: 2834: 2831: 2829: 2826: 2824: 2821: 2815: 2812: 2811: 2810: 2807: 2806: 2805: 2802: 2800: 2797: 2793: 2792:Lunar eclipse 2790: 2788: 2785: 2784: 2783: 2780: 2779: 2777: 2773: 2767: 2764: 2762: 2759: 2757: 2754: 2752: 2749: 2747: 2746:Current sheet 2744: 2743: 2741: 2739: 2735: 2729: 2726: 2724: 2721: 2719: 2716: 2714: 2711: 2709: 2706: 2704: 2703:Solar minimum 2701: 2699: 2698:Solar maximum 2696: 2694: 2693:Active region 2691: 2687: 2684: 2683: 2682: 2679: 2678: 2676: 2674: 2670: 2660: 2657: 2655: 2652: 2650: 2647: 2645: 2642: 2640: 2637: 2635: 2632: 2630: 2627: 2625: 2622: 2620: 2617: 2616: 2614: 2612: 2608: 2602: 2599: 2597: 2594: 2592: 2589: 2588: 2586: 2584: 2580: 2574: 2573:Ellerman bomb 2571: 2569: 2566: 2564: 2561: 2559: 2556: 2554: 2551: 2550: 2548: 2546: 2542: 2539: 2537: 2533: 2527: 2524: 2522: 2519: 2517: 2514: 2512: 2509: 2508: 2506: 2504: 2500: 2494: 2491: 2490: 2487: 2483: 2476: 2471: 2469: 2464: 2462: 2457: 2456: 2453: 2446: 2443: 2440: 2437: 2434: 2430: 2426: 2423: 2422: 2411: 2410: 2404: 2403: 2390: 2384: 2380: 2379: 2371: 2364: 2359: 2351: 2347: 2343: 2339: 2335: 2331: 2327: 2323: 2318: 2313: 2310:(8): 086901. 2309: 2305: 2298: 2290: 2286: 2281: 2276: 2272: 2268: 2263: 2258: 2254: 2250: 2249: 2244: 2237: 2230: 2225: 2223: 2221: 2212: 2206: 2202: 2201: 2193: 2185: 2181: 2177: 2171: 2167: 2166: 2158: 2150: 2144: 2140: 2139: 2131: 2129: 2127: 2122: 2114: 2112: 2108: 2104: 2100: 2096: 2086: 2083: 2082:monotonically 2079: 2074: 2070: 2066: 2065:main sequence 2041: 2037: 2033: 2030: 2025: 2022: 2018: 2013: 2009: 2006: 2003: 1981: 1978: 1974: 1951: 1948: 1944: 1935: 1932: 1928: 1909: 1903: 1899: 1892: 1886: 1878: 1877: 1876: 1873: 1871: 1867: 1862: 1848: 1844: 1840: 1837: 1832: 1829: 1825: 1820: 1816: 1813: 1810: 1802: 1801:monatomic gas 1798: 1794: 1790: 1786: 1781: 1779: 1754: 1751: 1747: 1743: 1738: 1735: 1732: 1725: 1721: 1717: 1710: 1706: 1702: 1693: 1687: 1683: 1679: 1676: 1672: 1663: 1662: 1661: 1660: 1659: 1657: 1652: 1650: 1646: 1642: 1638: 1616: 1612: 1604: 1598: 1591: 1585: 1581: 1572: 1566: 1563: 1557: 1548: 1535: 1529: 1514: 1513: 1512: 1510: 1485: 1482: 1478: 1474: 1469: 1466: 1463: 1457: 1453: 1442: 1438: 1422: 1421: 1420: 1419: 1418: 1416: 1411: 1409: 1391: 1388: 1384: 1375: 1350: 1347: 1343: 1339: 1334: 1328: 1324: 1313: 1309: 1293: 1292: 1291: 1290: 1289: 1286: 1284: 1280: 1276: 1270: 1260: 1258: 1254: 1250: 1223: 1220: 1217: 1211: 1208: 1205: 1200: 1197: 1191: 1188: 1185: 1178: 1177: 1176: 1175: 1174: 1152: 1142: 1129: 1125: 1115: 1112: 1109: 1103: 1100: 1093: 1089: 1085: 1079: 1073: 1063: 1052: 1045: 1041: 1036: 1033: 1030: 1024: 1017: 1016: 1015: 1014: 1013: 1011: 988: 984: 980: 976: 970: 966: 962: 957: 949: 945: 940: 937: 934: 923: 919: 913: 909: 905: 898: 893: 889: 885: 882: 875: 870: 867: 860: 859: 858: 857: 856: 854: 850: 845: 843: 839: 818: 813: 809: 800: 797: 790: 786: 782: 776: 770: 767: 763: 758: 753: 744: 738: 735: 732: 729: 722: 721: 720: 718: 713: 709: 688: 683: 680: 673: 669: 665: 662: 659: 652: 651: 650: 649: 648: 646: 645:ideal gas law 642: 639:pressure and 638: 634: 631: 627: 618: 616: 612: 591: 587: 582: 579: 574: 571: 564: 563: 562: 561: 560: 558: 554: 531: 527: 520: 516: 509: 506: 501: 498: 491: 490: 489: 488: 487: 485: 480: 478: 474: 470: 446: 438: 429: 424: 420: 415: 412: 409: 406: 403: 396: 395: 394: 393: 392: 390: 386: 382: 377: 375: 371: 367: 363: 358: 354: 350: 346: 342: 338: 334: 330: 326: 301: 293: 289: 280: 276: 272: 261: 257: 253: 250: 239: 233: 227: 221: 215: 209: 206: 200: 194: 185: 172: 166: 151: 150: 149: 147: 143: 133: 131: 125: 123: 119: 115: 111: 107: 103: 99: 88: 85: 83: 80: 78: 75: 73: 70: 68: 65: 63: 60: 58: 55: 53: 50: 48: 45: 43: 40: 38: 35: 33: 30: 29: 26: 21: 4358:White dwarfs 4348:Brown dwarfs 4331:Most distant 4279:Most massive 4257:Proper names 4217:Photographic 4170:Solar System 4148:observations 4075:Star systems 3898:Stellar wind 3881:Chromosphere 3860: 3854:Oscillations 3734:Helium flash 3584:Hypothetical 3562:X-ray binary 3501:Compact star 3336:Bright giant 3089:Henyey track 3067:Herbig Ae/Be 2873:Solar System 2843:Solar energy 2838:Solar dynamo 2799:Heliophysics 2629:Coronal loop 2624:Coronal hole 2601:Moreton wave 2583:Chromosphere 2515: 2414:</ref> 2408: 2377: 2370: 2365:, p. 37 2358: 2307: 2303: 2297: 2252: 2246: 2236: 2199: 2192: 2164: 2157: 2137: 2092: 2073:solar masses 2062: 1930: 1926: 1874: 1863: 1796: 1792: 1788: 1782: 1775: 1653: 1648: 1644: 1640: 1636: 1635: 1508: 1506: 1412: 1373: 1371: 1287: 1272: 1256: 1252: 1246: 1172: 1007: 852: 846: 841: 837: 835: 711: 707: 705: 632: 628:assumed the 624: 614: 608: 556: 550: 481: 476: 468: 466: 384: 378: 369: 365: 356: 352: 348: 344: 340: 336: 328: 324: 322: 145: 141: 139: 126: 101: 97: 95: 72:Solar corona 56: 47:Chromosphere 4411:Brown dwarf 4187:Circumpolar 4065:Kraft break 4045:Color index 4020:Metallicity 3980:Designation 3949:Cosmic dust 3871:Photosphere 3637:Dark-energy 3612:Electroweak 3597:Black dwarf 3528:Radio-quiet 3511:White dwarf 3397:White dwarf 3047:Bok globule 2931:Exploration 2809:Solar deity 2756:Heliosheath 2738:Heliosphere 2708:Wolf number 2681:Solar cycle 2545:Photosphere 42:Photosphere 4373:Candidates 4368:Supernovae 4353:Red dwarfs 4212:Extinction 4000:Kinematics 3995:Luminosity 3973:Properties 3866:Atmosphere 3764:Si burning 3754:Ne burning 3692:White hole 3665:Quasi-star 3592:Blue dwarf 3447:Technetium 3363:Hypergiant 3341:Supergiant 2883:Solar time 2804:In culture 2761:Heliopause 2713:Solar wind 2644:Prominence 2536:Atmosphere 2521:Tachocline 2262:1601.01930 2107:tachocline 2095:solar core 2078:tachocline 1267:See also: 1008:Using the 849:polytropic 130:gamma rays 114:convection 87:Solar wind 82:Prominence 67:Solar core 62:Tachocline 4304:Brightest 4202:Magnitude 4182:Pole star 4103:Symbiotic 4098:Eclipsing 4030:Starlight 3831:Structure 3821:Supernova 3814:Micronova 3809:Recurrent 3794:Symbiotic 3779:p-process 3774:r-process 3769:s-process 3759:O burning 3749:C burning 3729:CNO cycle 3672:Gravastar 3208:Hypernova 3198:Supernova 3173:Dredge-up 3146:Blue loop 3139:super-AGB 3122:Red clump 3099:Evolution 3057:Protostar 3037:Accretion 3029:Formation 2766:Bow shock 2673:Variation 2639:Nanoflare 2363:Pols 2011 2342:0034-4885 2317:1009.0852 2289:0004-637X 2255:(1): 45. 2229:Pols 2011 2019:γ 2007:− 1975:γ 1945:γ 1826:γ 1814:− 1785:polytrope 1748:γ 1739:− 1703:κ 1684:σ 1680:π 1599:ρ 1567:ρ 1479:γ 1470:− 1415:ideal gas 1385:γ 1344:γ 1314:ρ 1224:β 1221:− 1209:π 1198:κ 1116:β 1113:− 1090:σ 1037:ρ 1025:− 977:ρ 946:β 941:β 938:− 920:μ 910:σ 787:σ 749:radiation 736:β 733:− 684:μ 681:ρ 660:β 637:ideal gas 626:Eddington 592:λ 517:σ 444:∂ 436:∂ 416:π 410:− 331:) is the 277:σ 254:π 222:ρ 210:κ 201:− 4510:Category 4483:Category 4378:Remnants 4274:Extremes 4234:Parallax 4207:Apparent 4197:Asterism 4175:Sunlight 4125:Globular 4110:Multiple 4035:Variable 4025:Rotation 3985:Dynamics 3876:Starspot 3550:Magnetar 3493:Remnants 3309:Subgiant 3282:Subdwarf 3134:post-AGB 2966:Category 2350:34996296 2184:60454390 1283:buoyancy 836:so that 630:pressure 32:Granules 4450:Gravity 4399:Related 4319:Nearest 4267:Chinese 4115:Cluster 4088:Contact 3925:Proplyd 3799:Remnant 3687:Blitzar 3661:Hawking 3617:Strange 3567:Burster 3523:Neutron 3476:Extreme 3427:He-weak 3072:T Tauri 2782:Eclipse 2775:Related 2596:Spicule 2568:Sunspot 2563:Faculae 2558:Granule 2482:The Sun 2322:Bibcode 2267:Bibcode 2089:The Sun 1406:is the 360:is the 333:opacity 122:photons 37:Sunspot 4440:Galaxy 4428:Planet 4416:Desert 4324:bright 4262:Arabic 4083:Binary 3903:Bubble 3627:Planck 3602:Exotic 3538:Binary 3533:Pulsar 3471:Helium 3432:Barium 3375:Carbon 3368:Yellow 3356:Yellow 3329:Yellow 3168:PG1159 2611:Corona 2385:  2348:  2340:  2287:  2207:  2182:  2172:  2145:  1783:For a 1576:  1570:  1561:  1555:  1372:where 706:where 475:, and 467:Where 323:where 198:  192:  4445:Guest 4249:Lists 4130:Super 3784:Fusor 3657:Black 3642:Quark 3622:Preon 3607:Boson 3543:X-ray 3459:Shell 3412:Ap/Bp 3314:Giant 3232:Early 3178:OH/IR 3008:Stars 2723:Flare 2591:Plage 2312:arXiv 2257:arXiv 1249:model 855:=3): 100:, or 77:Flare 4120:Open 4015:Mass 3839:Core 3789:Nova 3682:Iron 3632:Dark 3442:Lead 3422:HgMn 3417:CEMP 3346:Blue 3319:Blue 3237:Late 3019:List 2903:Star 2814:List 2511:Core 2493:List 2431:and 2429:NASA 2383:ISBN 2346:PMID 2338:ISSN 2285:ISSN 2205:ISBN 2180:OCLC 2170:ISBN 2143:ISBN 2063:For 1733:< 1464:< 1335:> 486:by: 108:and 4516:Sun 4421:Sub 4155:Sun 3574:SGR 3351:Red 3324:Red 2433:ESA 2330:doi 2275:doi 2253:821 2111:Sun 1454:log 1439:log 1325:log 1310:log 715:is 120:as 25:Sun 4512:: 3454:Be 3407:Am 3390:CH 3385:CN 3304:OB 3299:WR 2344:. 2336:. 2328:. 2320:. 2308:74 2306:. 2283:. 2273:. 2265:. 2251:. 2245:. 2219:^ 2178:. 2125:^ 2113:. 1677:64 1651:. 1511:: 1410:. 1086:16 647:: 617:. 391:: 376:. 335:, 273:16 124:. 96:A 3647:Q 3466:B 3380:S 3292:B 3287:O 3275:M 3270:K 3265:G 3260:F 3255:A 3250:B 3245:O 3000:e 2993:t 2986:v 2474:e 2467:t 2460:v 2391:. 2352:. 2332:: 2324:: 2314:: 2291:. 2277:: 2269:: 2259:: 2213:. 2186:. 2151:. 2042:6 2038:/ 2034:1 2031:= 2026:d 2023:a 2014:/ 2010:1 2004:1 1982:d 1979:a 1952:d 1949:a 1931:r 1929:( 1927:M 1913:) 1910:r 1907:( 1904:M 1900:/ 1896:) 1893:r 1890:( 1887:L 1849:5 1845:/ 1841:2 1838:= 1833:d 1830:a 1821:/ 1817:1 1811:1 1797:T 1793:P 1789:n 1755:d 1752:a 1744:1 1736:1 1726:4 1722:T 1718:P 1711:M 1707:L 1694:G 1688:B 1673:3 1649:r 1645:r 1641:r 1639:( 1637:M 1617:2 1613:r 1608:) 1605:r 1602:( 1595:) 1592:r 1589:( 1586:M 1582:G 1573:= 1564:g 1558:= 1549:r 1545:d 1539:) 1536:r 1533:( 1530:P 1526:d 1509:g 1486:d 1483:a 1475:1 1467:1 1458:P 1449:d 1443:T 1434:d 1392:d 1389:a 1374:P 1351:d 1348:a 1340:1 1329:P 1320:d 1305:d 1257:M 1255:/ 1253:L 1227:) 1218:1 1215:( 1212:c 1206:4 1201:L 1192:= 1189:M 1186:G 1153:r 1149:d 1143:T 1139:d 1130:3 1126:T 1119:) 1110:1 1107:( 1104:c 1101:3 1094:B 1080:= 1074:r 1070:d 1064:P 1060:d 1053:= 1046:2 1042:r 1034:M 1031:G 989:3 985:/ 981:4 971:3 967:/ 963:1 958:) 950:4 935:1 924:4 914:B 906:4 899:4 894:B 890:k 886:c 883:3 876:( 871:= 868:P 853:n 842:P 838:T 819:P 814:4 810:T 801:c 798:3 791:B 783:4 777:= 771:P 768:3 764:u 759:= 754:P 745:P 739:= 730:1 712:B 708:k 689:T 674:B 670:k 666:= 663:P 633:P 615:Îș 588:c 583:3 580:1 575:= 572:D 557:D 532:4 528:T 521:B 510:c 507:4 502:= 499:U 477:u 469:D 447:r 439:u 430:D 425:2 421:r 413:4 407:= 404:L 385:r 370:L 366:Îș 357:B 353:σ 349:r 347:( 345:L 341:r 339:( 337:ρ 329:r 327:( 325:Îș 305:) 302:r 299:( 294:3 290:T 286:) 281:B 270:( 267:) 262:2 258:r 251:4 248:( 243:) 240:r 237:( 234:L 231:) 228:r 225:( 219:) 216:r 213:( 207:3 195:= 186:r 182:d 176:) 173:r 170:( 167:T 163:d 146:r 142:T

Index


Sun
Granules
Sunspot
Photosphere
Chromosphere
Convection zone
Radiation zone
Tachocline
Solar core
Solar corona
Flare
Prominence
Solar wind
radiative diffusion
thermal conduction
convection
electromagnetic radiation
photons
gamma rays
opacity
Stefan–Boltzmann constant
convection zones
Fick's first law
conservation of energy
diffusion coefficient
Stefan–Boltzmann law
elementary theory of diffusion coefficient in gases
mean free path
Eddington

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