2005年5月
Growth of primordial black holes in a universe containing a massless scalar field
PHYSICAL REVIEW D
- ,
- 巻
- 71
- 号
- 10
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevD.71.104010
- 出版者・発行元
- AMERICAN PHYSICAL SOC
The evolution of primordial black holes in a flat Friedmann universe with a massless scalar field is investigated in fully general relativistic numerical relativity. A primordial black hole is expected to form with a scale comparable to the cosmological apparent horizon, in which case it may go through an initial phase with significant accretion. However, if it is very close to the cosmological apparent horizon size, the accretion is suppressed due to general relativistic effects. In any case, it soon gets smaller than the cosmological horizon and thereafter it can be approximated as an isolated vacuum solution with decaying mass accretion. In this situation the dynamical and inhomogeneous scalar field is typically equivalent to a perfect fluid with a stiff equation of state p = rho. The black hole mass never increases by more than a factor of 2, despite recent claims that primordial black holes might grow substantially through accreting quintessence. It is found that the gravitational memory scenario, proposed for primordial black holes in Brans-Dicke and scalar-tensor theories of gravity, is highly unphysical.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevD.71.104010
- ISSN : 1550-7998
- Web of Science ID : WOS:000229440400046