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Search for sub-solar mass ultracompact binaries in Advanced LIGO's second observing run

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Search for sub-solar mass ultracompact binaries in Advanced LIGO's second observing run. / The LIGO Scientific Collaboration ; Harry, I. W.; Keitel, D.; Lundgren, A. P.; McIsaac, C.; Nuttall, L. K.; Williamson, A. R.

In: Physical Review Letters, Vol. 123, No. 16, 161102, 18.10.2019.

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@article{18468b57a7764280badf02f6b6dd501a,
title = "Search for sub-solar mass ultracompact binaries in Advanced LIGO's second observing run",
abstract = "We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO{\textquoteright}s second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the effects of component spin on the gravitational waveform. We identify no viable gravitational-wave candidates consistent with subsolar mass ultracompact binaries with at least one component between 0.2 M⊙–1.0 M⊙. We use the null result to constrain the binary merger rate of (0.2 M⊙, 0.2 M⊙) binaries to be less than 3.7 × 105 Gpc−3yr−1 and the binary merger rate of (1.0 M⊙, 1.0 M⊙) binaries to be less than 5.2 × 103 Gpc−3yr−1. Subsolar mass ultracompact objects are not expected to form via known stellar evolution channels, though it has been suggested that primordial density fluctuations or particle dark matter with cooling mechanisms and/or nuclear interactions could form black holes with subsolar masses. Assuming a particular primordial black hole (PBH) formation model, we constrain a population of merging 0.2 M⊙ black holes to account for less than 16% of the dark matter density and a population of merging 1.0 M⊙ black holes to account for less than 2% of the dark matter density. We discuss how constraints on the merger rate and dark matter fraction may be extended to arbitrary black hole population models that predict subsolar mass binaries.",
keywords = "astro-ph.CO, astro-ph.HE, gr-qc, RCUK, STFC",
author = "{The LIGO Scientific Collaboration} and Harry, {I. W.} and D. Keitel and Lundgren, {A. P.} and C. McIsaac and Nuttall, {L. K.} and Williamson, {A. R.}",
year = "2019",
month = oct,
day = "18",
doi = "10.1103/PhysRevLett.123.161102",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "16",

}

RIS

TY - JOUR

T1 - Search for sub-solar mass ultracompact binaries in Advanced LIGO's second observing run

AU - The LIGO Scientific Collaboration

AU - Harry, I. W.

AU - Keitel, D.

AU - Lundgren, A. P.

AU - McIsaac, C.

AU - Nuttall, L. K.

AU - Williamson, A. R.

PY - 2019/10/18

Y1 - 2019/10/18

N2 - We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO’s second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the effects of component spin on the gravitational waveform. We identify no viable gravitational-wave candidates consistent with subsolar mass ultracompact binaries with at least one component between 0.2 M⊙–1.0 M⊙. We use the null result to constrain the binary merger rate of (0.2 M⊙, 0.2 M⊙) binaries to be less than 3.7 × 105 Gpc−3yr−1 and the binary merger rate of (1.0 M⊙, 1.0 M⊙) binaries to be less than 5.2 × 103 Gpc−3yr−1. Subsolar mass ultracompact objects are not expected to form via known stellar evolution channels, though it has been suggested that primordial density fluctuations or particle dark matter with cooling mechanisms and/or nuclear interactions could form black holes with subsolar masses. Assuming a particular primordial black hole (PBH) formation model, we constrain a population of merging 0.2 M⊙ black holes to account for less than 16% of the dark matter density and a population of merging 1.0 M⊙ black holes to account for less than 2% of the dark matter density. We discuss how constraints on the merger rate and dark matter fraction may be extended to arbitrary black hole population models that predict subsolar mass binaries.

AB - We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO’s second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the effects of component spin on the gravitational waveform. We identify no viable gravitational-wave candidates consistent with subsolar mass ultracompact binaries with at least one component between 0.2 M⊙–1.0 M⊙. We use the null result to constrain the binary merger rate of (0.2 M⊙, 0.2 M⊙) binaries to be less than 3.7 × 105 Gpc−3yr−1 and the binary merger rate of (1.0 M⊙, 1.0 M⊙) binaries to be less than 5.2 × 103 Gpc−3yr−1. Subsolar mass ultracompact objects are not expected to form via known stellar evolution channels, though it has been suggested that primordial density fluctuations or particle dark matter with cooling mechanisms and/or nuclear interactions could form black holes with subsolar masses. Assuming a particular primordial black hole (PBH) formation model, we constrain a population of merging 0.2 M⊙ black holes to account for less than 16% of the dark matter density and a population of merging 1.0 M⊙ black holes to account for less than 2% of the dark matter density. We discuss how constraints on the merger rate and dark matter fraction may be extended to arbitrary black hole population models that predict subsolar mass binaries.

KW - astro-ph.CO

KW - astro-ph.HE

KW - gr-qc

KW - RCUK

KW - STFC

U2 - 10.1103/PhysRevLett.123.161102

DO - 10.1103/PhysRevLett.123.161102

M3 - Article

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

M1 - 161102

ER -

ID: 16060002