論文

査読有り
2005年5月

Upper limits on the size of a primordial black hole

PHYSICAL REVIEW D
  • T Harada
  • ,
  • BJ Carr

71
10
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.71.104009
出版者・発行元
AMER PHYSICAL SOC

We provide precise constraints on the size of any black holes forming in the early Universe for a variety of formation scenarios. In particular, we prove that the size of the apparent horizon of a primordial black hole formed by causal processes in a flat Friedmann universe is considerably smaller than the cosmological apparent horizon size for an equation of state p = k rho (1/3 < k < 1). This also applies for a stiff equation of state (k = 1) or for a massless scalar field. The apparent horizon of a primordial black hole formed through hydrodynamical processes is also considerably smaller than the cosmological apparent horizon for 0 < k <= 1. We derive an expression for the maximum size which an overdense region can have without being a separate closed universe rather than part of our own. Newtonian argument shows that a black hole smaller than the cosmological horizon can never accrete much.


リンク情報
DOI
https://doi.org/10.1103/PhysRevD.71.104009
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000229440400045&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevD.71.104009
  • ISSN : 1550-7998
  • Web of Science ID : WOS:000229440400045

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