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Jeans equations

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measurements of our Galaxy, researchers were able to simulate the dark matter halo distribution using Jeans equations. By comparing measured values with Jeans equation simulation results, they confirmed the need for extra dark matter and placed limits on its ellipsoid size. They estimated the ratio
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The limiting factor of these simulations however, has been the data required to approximate stress tensor parameter values that dictate the Jeans equations behavior. Additionally, some constraints can be placed on Jeans equation simulations in order to produce reliable results Some of these
327: 1079:{\displaystyle n{\frac {\partial \langle {v_{j}}\rangle }{\partial t}}+\sum _{i}n\langle {v_{i}}\rangle {\frac {\partial {\langle {v_{j}}\rangle }}{\partial x_{i}}}=-n{\frac {\partial \Phi }{\partial x_{j}}}-\sum _{i}{\frac {\partial (n\sigma _{ij}^{2})}{\partial x_{i}}}\qquad (j=1,2,3.)} 201: 2192:
to the entire universe. Using measurements of stellar number density and various kinematic values, parameters within the Jeans equations can be estimated. This allows for various analyses to be made through the lens of Jeans equations. This is particularly useful when simulating
585: 2090: 578: 1244: 1196: 47:. The Jeans equations can come in a variety of different forms, depending on the structure of what is being modelled. Most utilization of these equations has been found in simulations with large number of gravitationally bound objects. 2197:
halo distributions, due to its isothermal, non-interactive behavior. Searches for structure in galaxy formation, dark matter formation, and universe formation can have observations supplemented with simulations using Jeans equations.
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in 1915 while working on stellar hydrodynamics. Since then, multiple solutions to the equations have been calculated analytically and numerically. Some notable solutions include a spherically symmetric solution, derived by
2218: 206: 94: 777:{\displaystyle {\frac {\partial (n\langle {v_{j}}\rangle )}{\partial t}}+n{\frac {\partial \Phi }{\partial x_{j}}}+\sum _{i}{\frac {\partial (n\langle {v_{i}v_{j}}\rangle )}{\partial x_{i}}}=0\qquad (j=1,2,3.)} 1941: 1948: 473: 381: 1454:{\displaystyle {\partial \rho \langle v_{r}\rangle \over \partial t}+{\partial \rho \langle v_{r}^{2}\rangle \over \partial r}+{\rho \over r}+\rho {\partial \Phi \over \partial r}=0} 2174: 820: 1096: 2133: 2643:
Adams, Joshua J.; Gebhardt, Karl; Blanc, Guillermo A.; Fabricius, Maximilian H.; Hill, Gary J.; Murphy, Jeremy D.; van den Bosch, Remco C. E.; van de Ven, Glenn (2012-01-03).
2302: 39:. The Jeans equations relate the second-order velocity moments to the density and potential of a stellar system for systems without collision. They are analogous to the 2257: 1223:
Notice that the Jeans equations contain 9 unknowns (3 average velocities and 6 stress tensor terms), but only 3 equations. This means that Jeans equations are not
1680:{\displaystyle {\partial \rho \langle v_{\theta }\rangle \over \partial t}+{\partial \rho \langle v_{r}v_{\theta }\rangle \over \partial r}+{\rho \over r}=0} 1884:{\displaystyle {\partial \rho \langle v_{\phi }\rangle \over \partial t}+{\partial \rho \langle v_{r}v_{\phi }\rangle \over \partial r}+{\rho \over r}=0} 322:{\displaystyle {\partial f \over \partial t}+{\vec {v}}\cdot {\vec {\nabla }}f-{\vec {\nabla }}\Phi \cdot {\partial f \over \partial {\vec {v}}}=0} 2849: 2268:
limitations include a wavelength resolution requirement, variable gravitational softening, and a minimum vertical structure particle resolution.
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Loebman, Sarah R.; Ivezić, Željko; Quinn, Thomas R.; Governato, Fabio; Brooks, Alyson M.; Christensen, Charlotte R.; Jurić, Mario (2012-09-26).
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is the average of component 1 of the velocity of the stars at a given point and time. The second set of equations may alternately be written as
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0.14. This method has been applied to many other galactic halos and have produced similar results regarding dark matter halo topology.
2361:"Efficient solution of the anisotropic spherically aligned axisymmetric Jeans equations of stellar hydrodynamics for galactic dynamics" 2297: 2795:
Truelove, J. Kelly; Klein, Richard I.; McKee, Christopher F.; Holliman Ii, John H.; Howell, Louis H.; Greenough, Jeffrey A. (1997).
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Artistic rendition of dark matter halo around the Milky Way. Jeans Equation simulations place limits on the size of this halo
2085:{\displaystyle {\partial (\rho \sigma _{r}^{2}) \over \partial r}+{2\rho \over r}+\rho {\partial \Phi \over \partial r}=0} 2797:"The Jeans Condition: A New Constraint on Spatial Resolution in Simulations of Isothermal Self-gravitational Hydrodynamics" 2580:"Constraints on the Shape of the Milky Way Dark Matter Halo from Jeans Equations Applied to Sloan Digital Sky Survey Data" 573:{\displaystyle {\frac {\partial n}{\partial t}}+\sum _{i}{\frac {\partial (n\langle {v_{i}}\rangle )}{\partial x_{i}}}=0,} 32: 19: 2494: 1236: 2717: 2458: 2230:
An example of such an analysis is given by the constraints that can be placed on the dark matter halo within the
1090: 2235: 2138: 790: 1191:{\displaystyle \sigma _{ij}^{2}=\langle {v_{i}v_{j}}\rangle -\langle {v_{i}}\rangle \langle {v_{j}}\rangle } 465: 86: 2422: 1224: 2775: 2402: 2339: 2097: 332: 2808: 2739: 2666: 2601: 2544: 2462: 2311: 1217: 56: 36: 2826: 2763: 2729: 2698: 2656: 2625: 2591: 2579: 2372: 787:
Here, the ⟨...⟩ notation means an average at a given point and time (x,t), so that, for example,
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University of Texas N-body Simulation. Governed by Jeans equations in a gravitational potential
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Haas, Brian L.; Hash, David B.; Bird, Graeme A.; Lumpkin, Forrest E.; Hassan, H. A. (1994).
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gravitational research. The scale of these simulations can range in size from just our
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To solve different systems, various assumptions are made about the stress tensor.
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One fundamental usage of Jean's equation is in spherical gravitational bodies.
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SDSS telescope that provides data for Jeans equation parameter estimation.
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Using the stress tensor with the assumption that it is diagonal and
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in 1983 and axisymmetric solutions found in 1995 by Richard Arnold.
2821: 2796: 2377: 2661: 2596: 2213: 1943:, can reduce these equations to a single simplified equation: 402:) is the density of stars in space, as a function of position 2176:) that require assumptions for the equation to be solved. 1209:
Some given assumptions regarding these equations include:
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The density around a given star remains the same, or is
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that describe the motion of a collection of stars in a
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The Collisionless Boltzmann equation, also called the
2245: 2141: 2100: 1951: 1899: 1694: 1468: 1247: 1099: 831: 793: 588: 476: 341: 209: 97: 1198:and measures the velocity dispersion in components 59:. However, they were first applied to astronomy by 2645:"The Central Dark Matter Distribution of NGC 2976" 2251: 2168: 2127: 2084: 1935: 1883: 1679: 1453: 1190: 1078: 814: 776: 572: 375: 321: 195: 2722:Monthly Notices of the Royal Astronomical Society 2365:Monthly Notices of the Royal Astronomical Society 2303:Monthly Notices of the Royal Astronomical Society 2239:of minor to major axis of this halo to be 0.47 55:The Jeans equations were originally derived by 2298:"Axisymmetric solutions of the Jeans equation" 376:{\displaystyle \nabla ^{2}\phi =4\pi G\rho .} 8: 2499:. Princeton, NJ: Princeton University Press. 1854: 1831: 1822: 1799: 1766: 1743: 1717: 1704: 1647: 1629: 1623: 1605: 1596: 1573: 1540: 1517: 1491: 1478: 1413: 1395: 1389: 1371: 1365: 1347: 1314: 1296: 1270: 1257: 1185: 1170: 1167: 1152: 1146: 1121: 926: 911: 901: 886: 856: 841: 809: 794: 716: 691: 616: 601: 537: 522: 2184:Jeans equation have found great utility in 43:for fluid flow and may be derived from the 1213:The flow in phase space must conserve mass 2820: 2733: 2660: 2595: 2496:Dynamics and Evolution of Galactic Nuclei 2376: 2244: 2151: 2146: 2140: 2110: 2105: 2099: 2056: 2041: 2036: 2023: 2018: 1996: 1973: 1968: 1952: 1950: 1927: 1922: 1909: 1904: 1898: 1848: 1838: 1816: 1806: 1783: 1760: 1750: 1734: 1711: 1695: 1693: 1641: 1636: 1617: 1612: 1590: 1580: 1557: 1534: 1524: 1508: 1485: 1469: 1467: 1425: 1407: 1402: 1383: 1378: 1359: 1354: 1331: 1308: 1303: 1287: 1264: 1248: 1246: 1178: 1173: 1160: 1155: 1139: 1129: 1124: 1112: 1104: 1098: 1039: 1021: 1013: 997: 991: 975: 957: 939: 919: 914: 910: 904: 894: 889: 877: 849: 844: 835: 830: 802: 797: 792: 731: 709: 699: 694: 679: 673: 657: 639: 609: 604: 589: 587: 552: 530: 525: 510: 504: 477: 475: 468:, the Jeans equations may be written as: 346: 340: 299: 298: 284: 267: 266: 249: 248: 234: 233: 210: 208: 167: 147: 124: 98: 96: 2200: 2169:{\displaystyle \sigma _{\theta }^{2}(r)} 2094:Again, there are two unknown functions ( 18: 2288: 815:{\displaystyle \langle {v_{1}}\rangle } 331:Combining the Vlasov equation with the 2773: 2423:"The Collisionless Boltzmann Equation" 2400: 2337: 7: 2508: 2506: 2780:: CS1 maint: unflagged free DOI ( 2407:: CS1 maint: unflagged free DOI ( 2359:Cappellari, Michele (2020-06-01). 2344:: CS1 maint: unflagged free DOI ( 2128:{\displaystyle \sigma _{r}^{2}(r)} 2067: 2062: 2059: 1984: 1955: 1771: 1737: 1722: 1698: 1545: 1511: 1496: 1472: 1436: 1431: 1428: 1319: 1290: 1275: 1251: 1032: 1000: 968: 963: 960: 932: 907: 861: 838: 724: 682: 650: 645: 642: 624: 592: 545: 513: 488: 480: 343: 295: 287: 278: 269: 251: 221: 213: 178: 170: 158: 153: 150: 135: 127: 109: 101: 77:Derivation from Boltzmann equation 14: 2752:10.1111/j.1365-2966.2006.11119.x 45:collisionless Boltzmann equation 16:System of differential equations 1048: 746: 2850:Partial differential equations 2515:"Yale Astronomy Lecture Notes" 2163: 2157: 2122: 2116: 2047: 2011: 1979: 1958: 1872: 1869: 1863: 1793: 1668: 1665: 1659: 1650: 1602: 1567: 1416: 1341: 1089:where the spatial part of the 1073: 1049: 1027: 1003: 771: 747: 719: 685: 619: 595: 540: 516: 304: 272: 254: 239: 33:partial differential equations 1: 456:) is the velocity, and Φ = Φ( 2614:10.1088/2041-8205/758/1/l23 383:gives the Jeans equations. 2871: 2716:Nelson, Andrew F. (2006). 2679:10.1088/0004-637x/745/1/92 2459:Princeton University Press 2210:Milky Way dark matter halo 2801:The Astrophysical Journal 2649:The Astrophysical Journal 2584:The Astrophysical Journal 1231:Spherical Jeans equations 2296:Arnold, Richard (1995). 2236:Sloan Digital Sky Survey 1237:In spherical coordinates 2324:10.1093/mnras/276.1.293 466:gravitational potential 203:Or in vector form: 2855:Equations of astronomy 2513:Van Den Bosch, Frank. 2263:Simulation limitations 2253: 2227: 2206: 2170: 2129: 2086: 1937: 1885: 1681: 1455: 1192: 1080: 816: 778: 574: 377: 323: 197: 24: 2387:10.1093/mnras/staa959 2254: 2225: 2204: 2171: 2130: 2087: 1938: 1886: 1682: 1456: 1239:, the equations are: 1193: 1081: 817: 779: 575: 378: 324: 198: 85:is a special form of 22: 2461:. pp. 195–197. 2252:{\displaystyle \pm } 2243: 2139: 2098: 1949: 1897: 1692: 1466: 1245: 1097: 1091:stress–energy tensor 829: 791: 586: 474: 386:More explicitly, If 339: 207: 95: 2813:1997ApJ...489L.179T 2744:2006MNRAS.373.1039N 2671:2012ApJ...745...92A 2606:2012ApJ...758L..23L 2549:1994PhFl....6.2191H 2467:1988gady.book.....B 2316:1995MNRAS.276..293A 2156: 2115: 2046: 2028: 1978: 1932: 1914: 1646: 1622: 1412: 1388: 1364: 1313: 1117: 1026: 87:Liouville' equation 57:James Clerk Maxwell 37:gravitational field 2249: 2228: 2207: 2166: 2142: 2125: 2101: 2082: 2032: 2014: 1964: 1933: 1918: 1900: 1881: 1677: 1632: 1608: 1451: 1398: 1374: 1350: 1299: 1206:at a given point. 1188: 1100: 1076: 1009: 996: 882: 812: 774: 678: 570: 509: 373: 319: 193: 25: 2537:Physics of Fluids 2455:Galactic Dynamics 2223: 2186:N-body simulation 2074: 2009: 1991: 1791: 1778: 1729: 1565: 1552: 1503: 1443: 1339: 1326: 1282: 1046: 987: 982: 946: 873: 868: 738: 669: 664: 631: 559: 500: 495: 311: 307: 275: 257: 242: 228: 185: 165: 142: 116: 89:and is given by: 2862: 2835: 2834: 2824: 2807:(2): L179–L183. 2792: 2786: 2785: 2779: 2771: 2737: 2735:astro-ph/0609493 2728:(3): 1039–1073. 2713: 2707: 2706: 2664: 2640: 2634: 2633: 2599: 2575: 2569: 2568: 2557:10.1063/1.868221 2543:(6): 2191–2201. 2528: 2522: 2521: 2519: 2510: 2501: 2500: 2487: 2481: 2480: 2443: 2437: 2436: 2434: 2433: 2419: 2413: 2412: 2406: 2398: 2380: 2371:(4): 4819–4837. 2356: 2350: 2349: 2343: 2335: 2293: 2258: 2256: 2255: 2250: 2224: 2175: 2173: 2172: 2167: 2155: 2150: 2134: 2132: 2131: 2126: 2114: 2109: 2091: 2089: 2088: 2083: 2075: 2073: 2065: 2057: 2045: 2040: 2027: 2022: 2010: 2005: 1997: 1992: 1990: 1982: 1977: 1972: 1953: 1942: 1940: 1939: 1934: 1931: 1926: 1913: 1908: 1890: 1888: 1887: 1882: 1853: 1852: 1843: 1842: 1821: 1820: 1811: 1810: 1792: 1784: 1779: 1777: 1769: 1765: 1764: 1755: 1754: 1735: 1730: 1728: 1720: 1716: 1715: 1696: 1686: 1684: 1683: 1678: 1645: 1640: 1621: 1616: 1595: 1594: 1585: 1584: 1566: 1558: 1553: 1551: 1543: 1539: 1538: 1529: 1528: 1509: 1504: 1502: 1494: 1490: 1489: 1470: 1460: 1458: 1457: 1452: 1444: 1442: 1434: 1426: 1411: 1406: 1387: 1382: 1363: 1358: 1340: 1332: 1327: 1325: 1317: 1312: 1307: 1288: 1283: 1281: 1273: 1269: 1268: 1249: 1197: 1195: 1194: 1189: 1184: 1183: 1182: 1166: 1165: 1164: 1145: 1144: 1143: 1134: 1133: 1116: 1111: 1085: 1083: 1082: 1077: 1047: 1045: 1044: 1043: 1030: 1025: 1020: 998: 995: 983: 981: 980: 979: 966: 958: 947: 945: 944: 943: 930: 929: 925: 924: 923: 905: 900: 899: 898: 881: 869: 867: 859: 855: 854: 853: 836: 821: 819: 818: 813: 808: 807: 806: 783: 781: 780: 775: 739: 737: 736: 735: 722: 715: 714: 713: 704: 703: 680: 677: 665: 663: 662: 661: 648: 640: 632: 630: 622: 615: 614: 613: 590: 579: 577: 576: 571: 560: 558: 557: 556: 543: 536: 535: 534: 511: 508: 496: 494: 486: 478: 382: 380: 379: 374: 351: 350: 333:Poisson equation 328: 326: 325: 320: 312: 310: 309: 308: 300: 293: 285: 277: 276: 268: 259: 258: 250: 244: 243: 235: 229: 227: 219: 211: 202: 200: 199: 194: 186: 184: 176: 168: 166: 164: 156: 148: 143: 141: 133: 125: 117: 115: 107: 99: 2870: 2869: 2865: 2864: 2863: 2861: 2860: 2859: 2840: 2839: 2838: 2794: 2793: 2789: 2772: 2715: 2714: 2710: 2642: 2641: 2637: 2577: 2576: 2572: 2530: 2529: 2525: 2517: 2512: 2511: 2504: 2489: 2488: 2484: 2477: 2453:(1988). "4.2". 2451:Tremaine, Scott 2445: 2444: 2440: 2431: 2429: 2427:www.cv.nrao.edu 2421: 2420: 2416: 2399: 2358: 2357: 2353: 2336: 2295: 2294: 2290: 2286: 2278:Jeans's theorem 2274: 2265: 2241: 2240: 2214: 2212: 2182: 2137: 2136: 2096: 2095: 2066: 2058: 1998: 1983: 1954: 1947: 1946: 1895: 1894: 1844: 1834: 1812: 1802: 1770: 1756: 1746: 1736: 1721: 1707: 1697: 1690: 1689: 1586: 1576: 1544: 1530: 1520: 1510: 1495: 1481: 1471: 1464: 1463: 1435: 1427: 1318: 1289: 1274: 1260: 1250: 1243: 1242: 1233: 1174: 1156: 1135: 1125: 1095: 1094: 1093:is defined as: 1035: 1031: 999: 971: 967: 959: 935: 931: 915: 906: 890: 860: 845: 837: 827: 826: 798: 789: 788: 727: 723: 705: 695: 681: 653: 649: 641: 623: 605: 591: 584: 583: 548: 544: 526: 512: 487: 479: 472: 471: 455: 448: 441: 426: 419: 412: 342: 337: 336: 294: 286: 220: 212: 205: 204: 177: 169: 157: 149: 134: 126: 108: 100: 93: 92: 83:Vlasov Equation 79: 74: 53: 41:Euler equations 29:Jeans equations 17: 12: 11: 5: 2868: 2866: 2858: 2857: 2852: 2842: 2841: 2837: 2836: 2822:10.1086/310975 2787: 2708: 2635: 2570: 2523: 2502: 2491:Merritt, David 2482: 2475: 2457:(1 ed.). 2438: 2414: 2351: 2287: 2285: 2282: 2281: 2280: 2273: 2270: 2264: 2261: 2248: 2211: 2208: 2181: 2178: 2165: 2162: 2159: 2154: 2149: 2145: 2124: 2121: 2118: 2113: 2108: 2104: 2081: 2078: 2072: 2069: 2064: 2061: 2055: 2052: 2049: 2044: 2039: 2035: 2031: 2026: 2021: 2017: 2013: 2008: 2004: 2001: 1995: 1989: 1986: 1981: 1976: 1971: 1967: 1963: 1960: 1957: 1930: 1925: 1921: 1917: 1912: 1907: 1903: 1880: 1877: 1874: 1871: 1868: 1865: 1862: 1859: 1856: 1851: 1847: 1841: 1837: 1833: 1830: 1827: 1824: 1819: 1815: 1809: 1805: 1801: 1798: 1795: 1790: 1787: 1782: 1776: 1773: 1768: 1763: 1759: 1753: 1749: 1745: 1742: 1739: 1733: 1727: 1724: 1719: 1714: 1710: 1706: 1703: 1700: 1676: 1673: 1670: 1667: 1664: 1661: 1658: 1655: 1652: 1649: 1644: 1639: 1635: 1631: 1628: 1625: 1620: 1615: 1611: 1607: 1604: 1601: 1598: 1593: 1589: 1583: 1579: 1575: 1572: 1569: 1564: 1561: 1556: 1550: 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1591: 1587: 1581: 1577: 1570: 1562: 1559: 1554: 1548: 1535: 1531: 1525: 1521: 1514: 1505: 1499: 1486: 1482: 1475: 1461: 1448: 1445: 1439: 1422: 1419: 1408: 1403: 1399: 1392: 1384: 1379: 1375: 1368: 1360: 1355: 1351: 1344: 1336: 1333: 1328: 1322: 1309: 1304: 1300: 1293: 1284: 1278: 1265: 1261: 1254: 1240: 1238: 1230: 1228: 1226: 1219: 1215: 1212: 1211: 1210: 1207: 1205: 1201: 1179: 1175: 1161: 1157: 1149: 1140: 1136: 1130: 1126: 1118: 1113: 1108: 1105: 1101: 1092: 1070: 1067: 1064: 1061: 1058: 1055: 1052: 1040: 1036: 1022: 1017: 1014: 1010: 1006: 992: 988: 984: 976: 972: 954: 951: 948: 940: 936: 920: 916: 895: 891: 883: 878: 874: 870: 864: 850: 846: 832: 825: 824: 823: 803: 799: 768: 765: 762: 759: 756: 753: 750: 743: 740: 732: 728: 710: 706: 700: 696: 688: 674: 670: 666: 658: 654: 636: 633: 627: 610: 606: 598: 582: 581: 580: 567: 564: 561: 553: 549: 531: 527: 519: 505: 501: 497: 491: 483: 469: 467: 463: 459: 452: 445: 438: 434: 430: 423: 416: 409: 405: 401: 397: 393: 389: 384: 370: 367: 364: 361: 358: 355: 352: 347: 334: 329: 316: 313: 301: 290: 281: 263: 260: 245: 236: 230: 224: 216: 190: 187: 181: 173: 161: 144: 138: 130: 121: 118: 112: 104: 90: 88: 84: 76: 71: 69: 67: 62: 58: 50: 48: 46: 42: 38: 34: 31:are a set of 30: 21: 2804: 2800: 2790: 2776:cite journal 2725: 2721: 2711: 2652: 2648: 2638: 2587: 2583: 2573: 2540: 2536: 2526: 2495: 2485: 2454: 2441: 2430:. Retrieved 2426: 2417: 2403:cite journal 2368: 2364: 2354: 2340:cite journal 2307: 2301: 2291: 2266: 2229: 2190:solar system 2183: 2180:Applications 2093: 1945: 1892: 1688: 1462: 1241: 1234: 1222: 1208: 1203: 1199: 1088: 786: 470: 461: 457: 450: 443: 436: 432: 428: 421: 414: 407: 403: 399: 395: 391: 387: 385: 335:for gravity: 330: 91: 80: 66:James Binney 54: 28: 26: 2310:: 293–300. 2195:dark matter 427:) and time 72:Mathematics 61:James Jeans 2844:Categories 2687:2152/35153 2590:(1): L23. 2432:2022-04-23 2378:1907.09894 2284:References 2831:120393398 2760:0035-8711 2703:118429887 2695:0004-637X 2662:1110.5951 2655:(1): 92. 2622:2041-8205 2597:1209.2708 2565:1070-6631 2395:0035-8711 2332:1365-2966 2247:± 2232:Milky Way 2148:θ 2144:σ 2103:σ 2068:∂ 2063:Φ 2060:∂ 2054:ρ 2038:θ 2034:σ 2030:− 2016:σ 2003:ρ 1985:∂ 1966:σ 1962:ρ 1956:∂ 1924:ϕ 1920:σ 1906:θ 1902:σ 1867:θ 1861:⁡ 1855:⟩ 1850:ϕ 1840:θ 1832:⟨ 1823:⟩ 1818:ϕ 1800:⟨ 1786:ρ 1772:∂ 1767:⟩ 1762:ϕ 1744:⟨ 1741:ρ 1738:∂ 1723:∂ 1718:⟩ 1713:ϕ 1705:⟨ 1702:ρ 1699:∂ 1663:θ 1657:⁡ 1648:⟩ 1638:ϕ 1630:⟨ 1627:− 1624:⟩ 1614:θ 1606:⟨ 1597:⟩ 1592:θ 1574:⟨ 1560:ρ 1546:∂ 1541:⟩ 1536:θ 1518:⟨ 1515:ρ 1512:∂ 1497:∂ 1492:⟩ 1487:θ 1479:⟨ 1476:ρ 1473:∂ 1437:∂ 1432:Φ 1429:∂ 1423:ρ 1414:⟩ 1404:ϕ 1396:⟨ 1393:− 1390:⟩ 1380:θ 1372:⟨ 1369:− 1366:⟩ 1348:⟨ 1334:ρ 1320:∂ 1315:⟩ 1297:⟨ 1294:ρ 1291:∂ 1276:∂ 1271:⟩ 1258:⟨ 1255:ρ 1252:∂ 1186:⟩ 1171:⟨ 1168:⟩ 1153:⟨ 1150:− 1147:⟩ 1122:⟨ 1102:σ 1033:∂ 1011:σ 1001:∂ 989:∑ 985:− 969:∂ 964:Φ 961:∂ 952:− 933:∂ 927:⟩ 912:⟨ 908:∂ 902:⟩ 887:⟨ 875:∑ 862:∂ 857:⟩ 842:⟨ 839:∂ 810:⟩ 795:⟨ 725:∂ 717:⟩ 692:⟨ 683:∂ 671:∑ 651:∂ 646:Φ 643:∂ 625:∂ 617:⟩ 602:⟨ 593:∂ 546:∂ 538:⟩ 523:⟨ 514:∂ 502:∑ 489:∂ 481:∂ 464:) is the 368:ρ 362:π 353:ϕ 344:∇ 305:→ 296:∂ 288:∂ 282:⋅ 279:Φ 273:→ 270:∇ 264:− 255:→ 252:∇ 246:⋅ 240:→ 222:∂ 214:∂ 179:∂ 171:∂ 159:∂ 154:Φ 151:∂ 145:− 136:∂ 128:∂ 110:∂ 102:∂ 2768:17175349 2630:18220516 2493:(2013). 2272:See also 2234:. Using 2809:Bibcode 2740:Bibcode 2667:Bibcode 2602:Bibcode 2545:Bibcode 2463:Bibcode 2312:Bibcode 1225:closed. 51:History 2829:  2766:  2758:  2701:  2693:  2628:  2620:  2563:  2473:  2393:  2330:  2827:S2CID 2764:S2CID 2730:arXiv 2699:S2CID 2657:arXiv 2626:S2CID 2592:arXiv 2518:(PDF) 2373:arXiv 2782:link 2756:ISSN 2691:ISSN 2618:ISSN 2561:ISSN 2471:ISBN 2409:link 2391:ISSN 2346:link 2328:ISSN 2135:and 1202:and 27:The 2817:doi 2805:489 2748:doi 2726:373 2683:hdl 2675:doi 2653:745 2610:doi 2588:758 2553:doi 2383:doi 2369:494 2320:doi 2308:276 1858:cot 1654:cot 435:= ( 406:= ( 2846:: 2825:. 2815:. 2803:. 2799:. 2778:}} 2774:{{ 2762:. 2754:. 2746:. 2738:. 2724:. 2720:. 2697:. 2689:. 2681:. 2673:. 2665:. 2651:. 2647:. 2624:. 2616:. 2608:. 2600:. 2586:. 2582:. 2559:. 2551:. 2539:. 2535:. 2505:^ 2469:. 2449:; 2425:. 2405:}} 2401:{{ 2389:. 2381:. 2367:. 2363:. 2342:}} 2338:{{ 2326:. 2318:. 2306:. 2300:. 1071:3. 769:3. 431:, 2833:. 2819:: 2811:: 2784:) 2770:. 2750:: 2742:: 2732:: 2705:. 2685:: 2677:: 2669:: 2659:: 2632:. 2612:: 2604:: 2594:: 2567:. 2555:: 2547:: 2541:6 2520:. 2479:. 2465:: 2435:. 2411:) 2397:. 2385:: 2375:: 2348:) 2334:. 2322:: 2314:: 2164:) 2161:r 2158:( 2153:2 2123:) 2120:r 2117:( 2112:2 2107:r 2080:0 2077:= 2071:r 2051:+ 2048:] 2043:2 2025:2 2020:r 2012:[ 2007:r 2000:2 1994:+ 1988:r 1980:) 1975:2 1970:r 1959:( 1929:2 1916:= 1911:2 1879:0 1876:= 1873:] 1870:) 1864:( 1846:v 1836:v 1829:2 1826:+ 1814:v 1808:r 1804:v 1797:3 1794:[ 1789:r 1781:+ 1775:r 1758:v 1752:r 1748:v 1732:+ 1726:t 1709:v 1675:0 1672:= 1669:] 1666:) 1660:( 1651:) 1643:2 1634:v 1619:2 1610:v 1603:( 1600:+ 1588:v 1582:r 1578:v 1571:3 1568:[ 1563:r 1555:+ 1549:r 1532:v 1526:r 1522:v 1506:+ 1500:t 1483:v 1449:0 1446:= 1440:r 1420:+ 1417:] 1409:2 1400:v 1385:2 1376:v 1361:2 1356:r 1352:v 1345:2 1342:[ 1337:r 1329:+ 1323:r 1310:2 1305:r 1301:v 1285:+ 1279:t 1266:r 1262:v 1204:j 1200:i 1180:j 1176:v 1162:i 1158:v 1141:j 1137:v 1131:i 1127:v 1119:= 1114:2 1109:j 1106:i 1074:) 1068:, 1065:2 1062:, 1059:1 1056:= 1053:j 1050:( 1041:i 1037:x 1028:) 1023:2 1018:j 1015:i 1007:n 1004:( 993:i 977:j 973:x 955:n 949:= 941:i 937:x 921:j 917:v 896:i 892:v 884:n 879:i 871:+ 865:t 851:j 847:v 833:n 804:1 800:v 772:) 766:, 763:2 760:, 757:1 754:= 751:j 748:( 744:0 741:= 733:i 729:x 720:) 711:j 707:v 701:i 697:v 689:n 686:( 675:i 667:+ 659:j 655:x 637:n 634:+ 628:t 620:) 611:j 607:v 599:n 596:( 568:, 565:0 562:= 554:i 550:x 541:) 532:i 528:v 520:n 517:( 506:i 498:+ 492:t 484:n 462:t 460:, 458:x 454:3 451:v 449:, 447:2 444:v 442:, 440:1 437:v 433:v 429:t 425:3 422:x 420:, 418:2 415:x 413:, 411:1 408:x 404:x 400:t 398:, 396:x 394:( 392:n 390:= 388:n 371:. 365:G 359:4 356:= 348:2 317:0 314:= 302:v 291:f 261:f 237:v 231:+ 225:t 217:f 191:0 188:= 182:v 174:f 162:r 139:r 131:f 122:v 119:+ 113:t 105:f

Index


partial differential equations
gravitational field
Euler equations
collisionless Boltzmann equation
James Clerk Maxwell
James Jeans
James Binney
Vlasov Equation
Liouville' equation
Poisson equation
gravitational potential
stress–energy tensor
incompressible
closed.
In spherical coordinates
N-body simulation
solar system
dark matter

Milky Way
Sloan Digital Sky Survey
Jeans's theorem
"Axisymmetric solutions of the Jeans equation"
Monthly Notices of the Royal Astronomical Society
Bibcode
1995MNRAS.276..293A
doi
10.1093/mnras/276.1.293
ISSN

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