Black holes in the low-mass gap: Implications for gravitational-wave observations

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Black holes in the low-mass gap: Implications for gravitational-wave observations. / Gupta, Anuradha; Gerosa, Davide; Arun, K. G.; Berti, Emanuele; Farr, Will M.; Sathyaprakash, B. S.

In: Physical Review D, 05.2020.

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@article{4a2af88324e14e1c84fc6f1891dedd58,
title = "Black holes in the low-mass gap: Implications for gravitational-wave observations",
abstract = "Binary neutron-star mergers will predominantly produce black-hole remnants of mass ∼3 - 4 M☉ , thus populating the putative low-mass gap between neutron stars and stellar-mass black holes. If these low-mass black holes are in dense astrophysical environments, mass segregation could lead to {"}second-generation{"} compact binaries merging within a Hubble time. In this paper, we investigate possible signatures of such low-mass compact binary mergers in gravitational-wave observations. We show that this unique population of objects, if present, will be uncovered by the third-generation gravitational-wave detectors, such as Cosmic Explorer and Einstein Telescope. Future joint measurements of chirp mass M and effective spin χeff could clarify the formation scenario of compact objects in the low-mass gap. As a case study, we show that the recent detection of GW190425 (along with GW170817) favors a double Gaussian mass model for neutron stars, under the assumption that the primary in GW190425 is a black hole formed from a previous binary neutron-star merger....",
author = "Anuradha Gupta and Davide Gerosa and Arun, {K. G.} and Emanuele Berti and Farr, {Will M.} and Sathyaprakash, {B. S.}",
year = "2020",
month = may,
doi = "10.1103/PhysRevD.101.103036",
language = "Undefined/Unknown",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "1550-7998",
publisher = "American Physical Society (APS)",

}

RIS

TY - JOUR

T1 - Black holes in the low-mass gap: Implications for gravitational-wave observations

AU - Gupta, Anuradha

AU - Gerosa, Davide

AU - Arun, K. G.

AU - Berti, Emanuele

AU - Farr, Will M.

AU - Sathyaprakash, B. S.

PY - 2020/5

Y1 - 2020/5

N2 - Binary neutron-star mergers will predominantly produce black-hole remnants of mass ∼3 - 4 M☉ , thus populating the putative low-mass gap between neutron stars and stellar-mass black holes. If these low-mass black holes are in dense astrophysical environments, mass segregation could lead to "second-generation" compact binaries merging within a Hubble time. In this paper, we investigate possible signatures of such low-mass compact binary mergers in gravitational-wave observations. We show that this unique population of objects, if present, will be uncovered by the third-generation gravitational-wave detectors, such as Cosmic Explorer and Einstein Telescope. Future joint measurements of chirp mass M and effective spin χeff could clarify the formation scenario of compact objects in the low-mass gap. As a case study, we show that the recent detection of GW190425 (along with GW170817) favors a double Gaussian mass model for neutron stars, under the assumption that the primary in GW190425 is a black hole formed from a previous binary neutron-star merger....

AB - Binary neutron-star mergers will predominantly produce black-hole remnants of mass ∼3 - 4 M☉ , thus populating the putative low-mass gap between neutron stars and stellar-mass black holes. If these low-mass black holes are in dense astrophysical environments, mass segregation could lead to "second-generation" compact binaries merging within a Hubble time. In this paper, we investigate possible signatures of such low-mass compact binary mergers in gravitational-wave observations. We show that this unique population of objects, if present, will be uncovered by the third-generation gravitational-wave detectors, such as Cosmic Explorer and Einstein Telescope. Future joint measurements of chirp mass M and effective spin χeff could clarify the formation scenario of compact objects in the low-mass gap. As a case study, we show that the recent detection of GW190425 (along with GW170817) favors a double Gaussian mass model for neutron stars, under the assumption that the primary in GW190425 is a black hole formed from a previous binary neutron-star merger....

U2 - 10.1103/PhysRevD.101.103036

DO - 10.1103/PhysRevD.101.103036

M3 - Article

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

ER -