Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run

B. P. Abbott, S. V. Angelova, R. Birney, S. Macfoy, S. Reid, LIGO Scientific Collaboration, Virgo Collaboration

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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−3 yr−1 and the binary merger rate of (1.0  M⊙, 1.0  M⊙) binaries to be less than 5.2×103  Gpc−3 yr−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.
LanguageEnglish
Article number161102
Number of pages13
JournalPhysical Review Letters
Volume123
Issue number16
DOIs
Publication statusPublished - 18 Oct 2019

Fingerprint

LIGO (observatory)
dark matter
nuclear interactions
stellar evolution
gravitational waves
waveforms
cooling

Keywords

  • gravitational wave detection
  • LIGO
  • general relativity
  • neutron stars
  • pulsars
  • dark matter

Cite this

Abbott, B. P., Angelova, S. V., Birney, R., Macfoy, S., Reid, S., LIGO Scientific Collaboration, & Virgo Collaboration (2019). Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run. Physical Review Letters, 123(16), [161102]. https://doi.org/10.1103/PhysRevLett.123.161102
Abbott, B. P. ; Angelova, S. V. ; Birney, R. ; Macfoy, S. ; Reid, S. ; LIGO Scientific Collaboration ; Virgo Collaboration. / Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run. In: Physical Review Letters. 2019 ; Vol. 123, No. 16.
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Abbott, BP, Angelova, SV, Birney, R, Macfoy, S, Reid, S, LIGO Scientific Collaboration & Virgo Collaboration 2019, 'Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run' Physical Review Letters, vol. 123, no. 16, 161102. https://doi.org/10.1103/PhysRevLett.123.161102

Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run. / Abbott, B. P.; Angelova, S. V.; Birney, R.; Macfoy, S.; Reid, S.; LIGO Scientific Collaboration; Virgo Collaboration.

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

Research output: Contribution to journalArticle

TY - JOUR

T1 - Search for subsolar-mass ultracompact binaries in advanced LIGO's second observing run

AU - Abbott, B. P.

AU - Angelova, S. V.

AU - Birney, R.

AU - Macfoy, S.

AU - Reid, S.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

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−3 yr−1 and the binary merger rate of (1.0  M⊙, 1.0  M⊙) binaries to be less than 5.2×103  Gpc−3 yr−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−3 yr−1 and the binary merger rate of (1.0  M⊙, 1.0  M⊙) binaries to be less than 5.2×103  Gpc−3 yr−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 - gravitational wave detection

KW - LIGO

KW - general relativity

KW - neutron stars

KW - pulsars

KW - dark matter

U2 - 10.1103/PhysRevLett.123.161102

DO - 10.1103/PhysRevLett.123.161102

M3 - Article

VL - 123

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

M1 - 161102

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