期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2021/02/002
关键词
primordial black holes; physics of the early universe; cosmological perturbation theory
资金
- Royal Society
- Science and Technology Facilities Council [ST/T000473/1, ST/N504452/1]
- Humboldt Research Fellowship for Postdoctoral researchers
The study compares constraints on the power spectrum and mass distributions of primordial black holes using different methods. Results show that, as long as the criteria for PBH formation and power spectrum smoothing are consistent, the constraints vary by only about 10%.
We compare primordial black hole (PBH) constraints on the power spectrum and mass distributions using the traditional Press Schechter formalism, peaks theory, and a recently developed version of peaks theory relevant to PBHs. We show that, provided the PBH formation criteria and the power spectrum smoothing are treated consistently, the constraints only vary by similar to 10% between methods (a difference that will become increasingly important with better data). Our robust constraints from PBHs take into account the effects of critical collapse, the non-linear relation between zeta and delta and the shift from the PBH mass to the power spectrum peak scale. We show that these constraints are remarkably similar to the pulsar timing array (PTA) constraints impacting the black hole masses detected by LIGO and Virgo, but that the mu-distortion constraints rule out supermassive black hole (SMBH) formation and potentially even the much lighter mass range of similar to (1-100) M-circle dot that LIGO/Virgo probes.
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