Lower bound on the primordial black hole merger rate

TY - JOUR

T1 - Lower bound on the primordial black hole merger rate

AU - Vaskonen, Ville

AU - Veermäe, Hardi

PY - 2020/2/15

Y1 - 2020/2/15

N2 - 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 1-100Mm. We further show that LIGO/Virgo design sensitivity has the potential to reach the PBH mass range of 10-2-103Mm. The constraint from the merger rate of perturbed binaries is stronger if PBHs are initially spatially clustered.

AB - 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 1-100Mm. We further show that LIGO/Virgo design sensitivity has the potential to reach the PBH mass range of 10-2-103Mm. The constraint from the merger rate of perturbed binaries is stronger if PBHs are initially spatially clustered.

UR - http://www.scopus.com/inward/record.url?scp=85080956489&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.101.043015

DO - 10.1103/PhysRevD.101.043015

M3 - Article

AN - SCOPUS:85080956489

SN - 2470-0010

VL - 101

JO - Physical Review D

JF - Physical Review D

IS - 4

M1 - 043015

ER -