Jeans analysis in modified gravity

被引：44
作者：
Roshan, Mahmood [1 ]
Abbassi, Shahram [1 ,2 ,3 ]
机构：
[1] Ferdowsi Univ Mashhad, Dept Phys, Mashhad, Iran
[2] Inst Res Fundamental Sci IPM, Sch Astron, Tehran, Iran
[3] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
来源：
PHYSICAL REVIEW D | 2014年 / 90卷 / 04期
关键词：
D O I：
10.1103/PhysRevD.90.044010
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
MOdified Gravity (MOG) is a covariant modification of Einstein's general relativity. This theory is one of the current alternatives to dark matter models. We describe the dynamics of collisionless self-gravitating systems in the context of MOG. By studying the weak field approximation of this theory, we derive the equations governing the dynamics of the self-gravitating systems. More specifically, we consider the Jeans instability for self-gravitating fluid and stellar systems and derive new Jeans mass limit (M) over tilde (J) and wave-number (k) over tilde (J). Furthermore, considering the gravitational instability in star-forming regions, we show that MOG has not a significant difference with general relativity on this astrophysical scale. However, at larger scales, such as intergalactic space, MOG may lead to different galaxy- and structure-formation processes.
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页数：12
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共 28 条
  • [11] The Bullet Cluster 1E0657-558 evidence shows modified gravity in the absence of dark matter
    Brownstein, J. R.
    Moffat, J. W.
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 382 (01) : 29 - 47
  • [12] Galaxy rotation curves without nonbaryonic dark matter
    Brownstein, JR
    Moffat, JW
    [J]. ASTROPHYSICAL JOURNAL, 2006, 636 (02) : 721 - 741
  • [13] Galaxy cluster masses without non-baryonic dark matter
    Brownstein, JR
    Moffat, JW
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 367 (02) : 527 - 540
  • [14] Jeans analysis of self-gravitating systems in f(R) gravity
    Capozziello, S.
    De Laurentis, M.
    De Martino, I.
    Formisano, M.
    Odintsov, S. D.
    [J]. PHYSICAL REVIEW D, 2012, 85 (04):
  • [15] Hydrostatic equilibrium and stellar structure in f(R) gravity
    Capozziello, S.
    De Laurentis, M.
    Odintsov, S. D.
    Stabile, A.
    [J]. PHYSICAL REVIEW D, 2011, 83 (06)
  • [16] Gravitational collapse in f(R) theories
    Cembranos, J. A. R.
    de la Cruz-Dombriz, A.
    Nunez, B. Montes
    [J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2012, (04):
  • [17] Modified gravity and cosmology
    Clifton, Timothy
    Ferreira, Pedro G.
    Padilla, Antonio
    Skordis, Constantinos
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2012, 513 (1-3): : 1 - 189
  • [18] Black holes in f(R) theories
    de la Cruz-Dombriz, A.
    Dobado, A.
    Maroto, A. L.
    [J]. PHYSICAL REVIEW D, 2009, 80 (12):
  • [19] ABSORPTION-LINE SPECTRUM OF 4C 05.34
    LYNDS, R
    [J]. ASTROPHYSICAL JOURNAL, 1971, 164 (02) : L73 - &
  • [20] The physics of the intergalactic medium
    Meiksin, Avery A.
    [J]. REVIEWS OF MODERN PHYSICS, 2009, 81 (04) : 1405 - 1469
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