Looking for the parents of LIGO’s black holes

Baibhav, Vishal; Berti, Emanuele; Gerosa, Davide; Mould, Matthew; Wong, Kaze W. K.

doi:10.1103/physrevd.104.084002

Cited by 26 publications

(14 citation statements)

References 59 publications

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“…GW catalogs compiled by other groups [19][20][21][22][23] have largely confirmed the population of coalescing compact bina-These discoveries have already made a massive impact on our understanding of different tenets of astrophysics, fundamental physics, and cosmology. They have allowed a first glimpse into the dynamics of strongly curved spacetimes and the validity of general relativity (GR) in unexplored regimes of the theory [29][30][31][32][33][34], raised deeper questions on the formation mechanisms and evolutionary scenarios of compact objects [16,18,[35][36][37][38][39][40][41][42][43][44][45][46], provided a new tool for measuring cosmic distances that will help in precision cosmology [47,48] and in mapping the large scale structure of the Universe [49][50][51][52], and brought to bear a novel approach to determine the structure and properties of NSs to help in the exploration of the dense matter equation of state which governs the dynamics of NS cores [53][54][55][56][57][58][59][60][61][62]. The second part of the third observing run saw the discovery of two neutron star-black hole binaries, GW200105...…”

Section: Introductionmentioning

confidence: 99%

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Borhanian¹,

Sathyaprakash²

2022

Preprint

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Section: Introductionmentioning

confidence: 99%

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Borhanian¹,

Sathyaprakash²

2022

Preprint

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“…Chen et al (2018) show that an H 0 inference from GW sources with optical counterparts will converge faster than for dark sirens. Although using a so-called "dark siren" will not provide as precise a measurement from a single event compared to the case when the host galaxy is known, many more BH-BH mergers (dark sirens) are expected than NS-NS mergers (Baibhav et al 2019), providing a useful validation test of the optical-counterpart method. Furthermore, combining several measurements will yield increasingly tighter constraints on H 0 (Chen et al 2018;Nair et al 2018).…”

Section: The Standard-siren Methodsmentioning

confidence: 99%

A Measurement of the Hubble Constant Using Gravitational Waves from the Binary Merger GW190814

Vasylyev

Filippenko

2020

ApJ

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We present a test of the statistical method introduced by Bernard F. Shutz in 1986 using only gravitational waves to infer the Hubble constant (H0) from GW190814, the first high-probability neutron-star–black hole (NS–BH) merger candidate detected by the Laser Interferometer gravitational-wave Observatory (LIGO) and the Virgo interferometer. We apply a baseline test of this method to the binary neutron star (BNS) merger GW170817 and find km s−1 Mpc−1 (maximum a posteriori and 68.3% highest density posterior interval) for a galaxy B-band luminosity threshold of with a correction for catalog incompleteness. Repeating the calculation for GW190814, we obtain km s−1 Mpc−1 and km s−1 Mpc−1 for and , respectively. Combining the posteriors for both events yields km s−1 Mpc−1, demonstrating the improvement on constraints when using multiple gravitational-wave events. We also confirm the results of other works that adopt this method, showing that increasing the L B threshold enhances the posterior structure and slightly shifts the distribution’s peak to higher H0 values.We repeat the joint inference using the low-spin PhenomPNRT and the newly available combined (SEOBNRv4PHM + IMRPhenomPv3HM) posterior samples for GW170817 and GW190814, respectively, achieving a tighter constraint of km s−1 Mpc−1.

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“…Spins: Arguably, the most robust prediction for a hierarchical merger scenario are highly spinning remnants (Campanelli et al 2007;González et al 2007;Buonanno et al 2008;Baibhav et al 2021;Mahapatra et al 2021). Even if we assume that black holes in the first peak/generation to have low spins, the black holes in the second or higher generation should display high spins.…”

Section: The Hierarchical Merger Scenariomentioning

confidence: 99%

Exploring Features in the Binary Black Hole Population

Tiwari

2021

Preprint

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Vamana is the mixture model framework that infers the chirp mass, mass ratio and aligned spin distributions of the binary black holes (BBH) population. We extend the mixing components to also model the redshift evolution of merger rate and report all the major one and two-dimensional features in the BBH population using the 69 gravitational wave (GW) signals detected with a false alarm rate < 1yr −1 in the third Gravitational Wave Transient Catalog (GWTC)-3. Endorsing our previous report and corroborating recent report from LIGO Scientific, Virgo and KAGRA Collaborations, we observe the chirp mass distribution has multiple peaks and a lack of mergers with chirp masses 10-12M . In addition, we observe aligned spins show mass dependence with heavier binaries exhibiting larger spins, mass ratio does not show a notable dependence on either the chirp mass or the aligned spin, and the redshift evolution of the merger rate for the peaks in the mass distribution is disparate. These features possibly reflect the astrophysics associated with the BBH formation channels. However, additional observations are needed to improve our limited confidence in them.

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Looking for the parents of LIGO’s black holes

Cited by 26 publications

References 59 publications

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors

A Measurement of the Hubble Constant Using Gravitational Waves from the Binary Merger GW190814

Exploring Features in the Binary Black Hole Population

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