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## GW190412: Observation of a binary-black-hole coalescence with asymmetric masses

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Published

### Standard

GW190412 : Observation of a binary-black-hole coalescence with asymmetric masses. / LIGO Scientific Collaboration and Virgo Collaboration.

In: Physical Review D, Vol. 102, 043015, 24.08.2020.

Research output: Contribution to journalJournal articlepeer-review

### Harvard

LIGO Scientific Collaboration and Virgo Collaboration 2020, 'GW190412: Observation of a binary-black-hole coalescence with asymmetric masses', Physical Review D, vol. 102, 043015. https://doi.org/10.1103/PhysRevD.102.043015

### APA

LIGO Scientific Collaboration and Virgo Collaboration (2020). GW190412: Observation of a binary-black-hole coalescence with asymmetric masses. Physical Review D, 102, [043015]. https://doi.org/10.1103/PhysRevD.102.043015

### Vancouver

LIGO Scientific Collaboration and Virgo Collaboration. GW190412: Observation of a binary-black-hole coalescence with asymmetric masses. Physical Review D. 2020 Aug 24;102. 043015. https://doi.org/10.1103/PhysRevD.102.043015

### Author

LIGO Scientific Collaboration and Virgo Collaboration. / GW190412 : Observation of a binary-black-hole coalescence with asymmetric masses. In: Physical Review D. 2020 ; Vol. 102.

### Bibtex

@article{8132357510a54e8081259643471de4ba,
title = "GW190412: Observation of a binary-black-hole coalescence with asymmetric masses",
abstract = "We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO{\textquoteright}s and Virgo{\textquoteright}s third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ∼30  M⊙ black hole merged with a ∼8  M⊙ black hole companion. The more massive black hole rotated with a dimensionless spin magnitude between 0.22 and 0.60 (90% probability). Asymmetric systems are predicted to emit gravitational waves with stronger contributions from higher multipoles, and indeed we find strong evidence for gravitational radiation beyond the leading quadrupolar order in the observed signal. A suite of tests performed on GW190412 indicates consistency with Einstein{\textquoteright}s general theory of relativity. While the mass ratio of this system differs from all previous detections, we show that it is consistent with the population model of stellar binary black holes inferred from the first two observing runs.",
author = "{LIGO Scientific Collaboration and Virgo Collaboration} and Matthew Pitkin",
year = "2020",
month = aug,
day = "24",
doi = "10.1103/PhysRevD.102.043015",
language = "English",
volume = "102",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",

}

### RIS

TY - JOUR

T1 - GW190412

T2 - Observation of a binary-black-hole coalescence with asymmetric masses

AU - LIGO Scientific Collaboration and Virgo Collaboration

AU - Pitkin, Matthew

PY - 2020/8/24

Y1 - 2020/8/24

N2 - We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO’s and Virgo’s third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ∼30  M⊙ black hole merged with a ∼8  M⊙ black hole companion. The more massive black hole rotated with a dimensionless spin magnitude between 0.22 and 0.60 (90% probability). Asymmetric systems are predicted to emit gravitational waves with stronger contributions from higher multipoles, and indeed we find strong evidence for gravitational radiation beyond the leading quadrupolar order in the observed signal. A suite of tests performed on GW190412 indicates consistency with Einstein’s general theory of relativity. While the mass ratio of this system differs from all previous detections, we show that it is consistent with the population model of stellar binary black holes inferred from the first two observing runs.

AB - We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO’s and Virgo’s third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ∼30  M⊙ black hole merged with a ∼8  M⊙ black hole companion. The more massive black hole rotated with a dimensionless spin magnitude between 0.22 and 0.60 (90% probability). Asymmetric systems are predicted to emit gravitational waves with stronger contributions from higher multipoles, and indeed we find strong evidence for gravitational radiation beyond the leading quadrupolar order in the observed signal. A suite of tests performed on GW190412 indicates consistency with Einstein’s general theory of relativity. While the mass ratio of this system differs from all previous detections, we show that it is consistent with the population model of stellar binary black holes inferred from the first two observing runs.

U2 - 10.1103/PhysRevD.102.043015

DO - 10.1103/PhysRevD.102.043015

M3 - Journal article

VL - 102

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

M1 - 043015

ER -