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  Initial clustering and the primordial black hole merger rate

Young, S., & Byrnes, C. T. (2020). Initial clustering and the primordial black hole merger rate. Journal of Cosmology and Astroparticle Physics, 2020(3): 004. doi:10.1088/1475-7516/2020/03/004.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-A095-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-A096-B
Genre: Journal Article

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Young, Sam1, Author              
Byrnes, Christian T., Author
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1Department of Membrane Biophysics, MPI for biophysical chemistry, Max Planck Society, ou_578579              

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 Abstract: If the primordial curvature perturbation followed a Gaussian distribution, primordial black holes (PBHs) will be Poisson distributed with no additional clustering. We consider local non-Gaussianity and its impact on the initial PBH clustering and mass function due to mode coupling between long and short wavelength modes. We show that even a small amount of non-Gaussianity results in a significant enhancement on the PBH initial clustering and subsequent merger rate and that the PBH mass function shifts to higher mass PBHs. However, as the clustering becomes strong, the local number density of PBHs becomes large, leading to a large theoretical uncertainty in the merger rate.

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Language(s): eng - English
 Dates: 2020-03-02
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1475-7516/2020/03/004
Other: LOCALID: 3240444
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Title: Journal of Cosmology and Astroparticle Physics
  Abbreviation : J. Cosmol. Astropart. Phys.
  Abbreviation : JCAP
Source Genre: Journal
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Pages: - Volume / Issue: 2020 (3) Sequence Number: 004 Start / End Page: - Identifier: ISSN: 1475-7516