Number and entropy of halo black holes

被引：4

作者：

Frampton, Paul H. ^{[1
,2
]}

Ludwick, Kevin ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[2] Univ Tokyo, Inst Phys & Math Universe, Chiba 2778568, Japan

来源：

ASTROPARTICLE PHYSICS | 2011年 / 34卷 / 08期

关键词：

Black holes; Dark matter; MACHO PROJECT; DARK-MATTER; ERA;

D O I：

10.1016/j.astropartphys.2010.11.003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Based on constraints from microlensing and disk stability, both with and without limitations from wide binary surveys, we estimate the total number and entropy of intermediate mass black holes. Given the visible universe comprises 10(11) halos each of mass similar to 10(12) M(circle dot) typical core black holes of mean mass similar to 10(7) M(circle dot) set the dimensionless entropy (S/k) of the universe at a thousand googols. Identification of all dark matter as black holes sets the dimensionless entropy of the universe at 10 million googols, implying that dark matter can contribute over 99% of entropy, which favors all dark matter as black holes in the mass regime of similar to 10(5) M(circle dot). (C) 2011 Published by Elsevier B.V.

引用

页码：617 / 619

页数：3

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