論文

2018年12月15日

Effect of inhomogeneity on primordial black hole formation in the matter dominated era

Physical Review D
  • Takafumi Kokubu
  • ,
  • Koutarou Kyutoku
  • ,
  • Kazunori Kohri
  • ,
  • Tomohiro Harada

98
12
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.98.123024

© 2018 American Physical Society. We investigate the effect of inhomogeneity on primordial black hole formation in the matter dominated era. In the gravitational collapse of an inhomogeneous density distribution, a black hole forms if the apparent horizon prevents information of the central region of the configuration from leaking. Since information cannot propagate faster than the speed of light, we identify the threshold of the black hole formation by considering the finite speed for propagation of information. We show that the production probability βinhom(σ) of primordial black holes, where σ is the density fluctuation at horizon entry, is significantly enhanced from that derived in previous work in which the speed of propagation was effectively regarded as infinite. For σ1, we obtain βinhom≃3.70σ3/2, which is larger by about an order of magnitude than the probability derived in earlier work by assuming instantaneous propagation of information.

リンク情報
DOI
https://doi.org/10.1103/PhysRevD.98.123024
arXiv
http://arxiv.org/abs/arXiv:1810.03490
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85059405375&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85059405375&origin=inward
URL
http://arxiv.org/abs/1810.03490v1
ID情報
  • DOI : 10.1103/PhysRevD.98.123024
  • ISSN : 2470-0010
  • eISSN : 2470-0029
  • arXiv ID : arXiv:1810.03490
  • SCOPUS ID : 85059405375

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