Lower bound on the primordial black hole merger rate
By V. Vaskonen, H. Veermae. Physical Review D, 2019
146 citations recorded by the source corpus.
We derive a lower bound on the merger rate of primordial black hole (PBH) binaries by estimating the maximal fraction of binaries that were perturbed between formation in the early universe and merger, and computing a conservative merger rate of perturbed binaries. This implies robust constraints on the PBH abundance in the range $1-100 M_\odot$. We further show that LIGO/Virgo design sensitivity has the potential to reach the PBH mass range of $10^{-2}-10^3 M_\odot$. The constraint from the merger rate of perturbed binaries is stronger if PBHs are initially spatially clustered.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/2f792476c586431e622751cadcf2a1546f5f872f
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Citations in the corpus
- Primordial black holes as dark matter candidates (2021, methodology): “Vaskonen and Veermäe [169] argued that the fraction of disrupted initial binaries can be larger than estimated by Ali-Haïmoud et al.”
- Primordial Black Holes as Dark Matter: Recent Developments (2020, methodology): “Subsequent work [227, 228] has studied the formation and disruption of PBH binaries in more detail, using both analytical and numerical calculations for a general mass function.”
- Primordial black holes confront LIGO/Virgo data: current situation (2020, background): “1 [73, 105], affecting the constraint inferred from LIGO/Virgo observations.”
- Two populations of LIGO-Virgo black holes (2020, background): “The PBH binaries formed in the early Universe dominate the present merger rate [11, 12, 19, 55], even though most of these binaries are disrupted by interactions with other PBHs before they merge [14, 17].”