### Abstract

Gravitational-wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar-mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational-wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event is detected in this search. Consequently, we place upper limits on the merger rate density for a family of intermediate mass black hole binaries. In particular, we choose sources with total masses M=m1+m2∈[120,800] M⊙ and mass ratios q=m2/m1∈[0.1,1.0]. For the first time, this calculation is done using numerical relativity waveforms (which include higher modes) as models of the real emitted signal. We place a most stringent upper limit of 0.20 Gpc−3 yr−1 (in comoving units at the 90% confidence level) for equal-mass binaries with individual masses m1,2=100 M⊙ and dimensionless spins χ1,2=0.8 aligned with the orbital angular momentum of the binary. This improves by a factor of ∼5 that reported after Advanced LIGO’s first observing run.

Original language | English |
---|---|

Article number | 064064 |

Number of pages | 18 |

Journal | Physical Review D |

Volume | 100 |

Issue number | 6 |

DOIs | |

Publication status | Published - 30 Sep 2019 |

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### Keywords

- LIGO
- intermediate mass black hole binaries
- IMBHBs
- gravitational waves
- neutron stars
- binary black holes

### Cite this

*Physical Review D*,

*100*(6), [064064]. https://doi.org/10.1103/PhysRevD.100.064064

}

*Physical Review D*, vol. 100, no. 6, 064064. https://doi.org/10.1103/PhysRevD.100.064064

**Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network.** / Abbott, B. P.; Angelova, S. V.; Birney, R.; Macfoy, S.; Reid, S.; LIGO Scientific Collaboration; Virgo Collaboration.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network

AU - Abbott, B. P.

AU - Angelova, S. V.

AU - Birney, R.

AU - Macfoy, S.

AU - Reid, S.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

N1 - This research article is multi-authored. Please consult the manuscript for full attribution details.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - Gravitational-wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar-mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational-wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event is detected in this search. Consequently, we place upper limits on the merger rate density for a family of intermediate mass black hole binaries. In particular, we choose sources with total masses M=m1+m2∈[120,800] M⊙ and mass ratios q=m2/m1∈[0.1,1.0]. For the first time, this calculation is done using numerical relativity waveforms (which include higher modes) as models of the real emitted signal. We place a most stringent upper limit of 0.20 Gpc−3 yr−1 (in comoving units at the 90% confidence level) for equal-mass binaries with individual masses m1,2=100 M⊙ and dimensionless spins χ1,2=0.8 aligned with the orbital angular momentum of the binary. This improves by a factor of ∼5 that reported after Advanced LIGO’s first observing run.

AB - Gravitational-wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar-mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational-wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event is detected in this search. Consequently, we place upper limits on the merger rate density for a family of intermediate mass black hole binaries. In particular, we choose sources with total masses M=m1+m2∈[120,800] M⊙ and mass ratios q=m2/m1∈[0.1,1.0]. For the first time, this calculation is done using numerical relativity waveforms (which include higher modes) as models of the real emitted signal. We place a most stringent upper limit of 0.20 Gpc−3 yr−1 (in comoving units at the 90% confidence level) for equal-mass binaries with individual masses m1,2=100 M⊙ and dimensionless spins χ1,2=0.8 aligned with the orbital angular momentum of the binary. This improves by a factor of ∼5 that reported after Advanced LIGO’s first observing run.

KW - LIGO

KW - intermediate mass black hole binaries

KW - IMBHBs

KW - gravitational waves

KW - neutron stars

KW - binary black holes

U2 - 10.1103/PhysRevD.100.064064

DO - 10.1103/PhysRevD.100.064064

M3 - Article

VL - 100

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 6

M1 - 064064

ER -