Evolution of binary black holes in AGN accretion discs: Disc-binary interaction and gravitational wave emission

Ishibashi, W.; Gröbner, Matthias

doi:10.1051/0004-6361/202037799

Cited by 24 publications

(6 citation statements)

References 52 publications

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“…In addition to being well measured, the sign and magnitude of this parameter are each informative about the source's formation channel [71][72][73][74]. However, the predicted distributions in formation channels and the relative rates between channels can be sensitive to a number of highly uncertain prior assumptions, such as metallicity and the distributions of natal BH masses and spins [24,27,[75][76][77][78][79], as well as unaccounted dynamical factors in the models used to simulate populations [80][81][82].…”

Section: Introductionmentioning

confidence: 99%

New binary black hole mergers in the LIGO--Virgo O3a data

Olsen¹,

Venumadhav²,

Mushkin³

et al. 2022

Preprint

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We report the detection of ten new binary black hole (BBH) merger signals in the publicly released data from the the first half of the third observing run (O3a) of advanced LIGO and advanced Virgo. Candidates are identified using an updated version of the search pipeline described in Venumadhav et al.[1] (the "IAS pipeline" [2]), and events are declared according to criteria similar to those in the GWTC-2.1 catalog [3]. The updated search is sensitive to a larger region of parameter space, applies a template prior that accounts for different search volume as a function of intrinsic parameters, and uses an improved coherent detection statistic that optimally combines the data from the Hanford and Livingston detectors. Among the ten new events, we observe interesting astrophysical scenarios including sources with confidently large effective spin parameters in both the positive and negative directions, high-mass black holes that are difficult to form in stellar collapse models due to (pulsational) pair instability, and low-mass mergers that bridge the gap between neutron stars and the lightest observed black holes. We detect events populating the upper and lower black hole mass gaps with both extreme and near-unity mass ratios, and one of the possible neutron star-black hole (NSBH) mergers is well localized for electromagnetic (EM) counterpart searches. We see a substantial increase in significance for many of the events previously reported by other pipelines, and we detect all of the GWTC-2.1 BBH mergers with coincident data in Hanford and Livingston except for three loud events that get vetoed, which is compatible with the falsepositive rate of our veto procedure, and three that fall below the detection threshold. We also return to significance the event GW190909 114149, which was reduced to a sub-threshold trigger after its initial appearance in . This amounts to a total of 42 BBH mergers detected by our pipeline's search of the coincident Hanford-Livingston O3a data.

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Section: Introductionmentioning

confidence: 99%

New binary black hole mergers in the LIGO--Virgo O3a data

Olsen¹,

Venumadhav²,

Mushkin³

et al. 2022

Preprint

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“…★ E-mail: michela.mapelli@unipd.it Tanikawa 2013;Samsing et al 2014;Rodriguez et al 2016;Askar et al 2017;Fragione & Kocsis 2018;Choksi et al 2019;Hong et al 2018;Kamlah et al 2021), and nuclear star clusters (NSCs, Antonini & Rasio 2016;Petrovich & Antonini 2017;Antonini et al 2019;Arca Sedda et al 2020;Arca Sedda 2020;). Furthermore, gas torques in AGN discs trigger the formation of BBHs and speed up their mergers (e.g., Bartos et al 2017;Stone et al 2017;McKernan et al 2018;Yang et al 2019;Tagawa et al 2020;Ishibashi & Gröbner 2020). Finally, primordial black holes (BHs), born from gravitational collapses in the early Universe, might also pair up and merge via gravitational wave (GW) emission (e.g., Carr & Hawking 1974;Carr et al 2016;Sasaki et al 2016;Ali-Haïmoud et al 2017;Clesse & García-Bellido 2017;De Luca et al 2021).…”

Section: Introductionmentioning

confidence: 99%

The Cosmic Evolution of Binary Black Holes in Young, Globular and Nuclear Star Clusters: Rates, Masses, Spins and Mixing Fractions

Mapelli,

Bouffanais,

Santoliquido

et al. 2021

Preprint

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The growing population of binary black holes (BBHs) observed by gravitational wave detectors is a potential Rosetta stone for understanding their formation channels. Here, we use an upgraded version of our semi-analytic codes and R to investigate the cosmic evolution of four different BBH populations: isolated BBHs and dynamically formed BBHs in nuclear star clusters (NSCs), globular clusters (GCs), and young star clusters (YSCs). We find that the merger rate density of BBHs in GCs and NSCs is barely affected by stellar metallicity (𝑍), while the rate of isolated BBHs changes wildly with 𝑍. BBHs in YSCs behave in an intermediate way between isolated and GC/NSC BBHs. The local merger rate density of Nth-generation black holes (BHs), obtained by summing up hierarchical mergers in GCs, NSCs and YSCs, ranges from ∼ 1 to ∼ 4 Gpc −3 yr −1 and is mostly sensitive to the spin parameter. We find that the mass function of primary BHs evolves with redshift in GCs and NSCs, becoming more top-heavy at higher 𝑧. In contrast, the primary BH mass function almost does not change with redshift in YSCs and in the field. This signature of the BH mass function has relevant implications for Einstein Telescope and Cosmic Explorer. Finally, our analysis suggests that multiple channels contribute to the BBH population of the second gravitational-wave transient catalogue.

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“…The discovery of an IMBH population will bridge this observational gap, probe IMBH formation environments (e.g. accretion disks of active galactic nuclei [23][24][25][26][27][28][29][30][31][32][33][34][35], the centers of * avi.vajpeyi@monash.edu dense stellar clusters [36][37][38][39][40][41][42][43][44][45][46], Population-III stars [47][48][49][50][51]), and illuminate our understanding of supermassive black hole formation [52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

A search for intermediate-mass black holes mergers in the second LIGO--Virgo observing run with the Bayes Coherence Ratio

Vajpeyi,

Smith,

Thrane

et al. 2021

Preprint

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The detection of an intermediate-mass black hole population (10 2 − 10 6 M ) will provide clues to their formation environments (e.g., disks of active galactic nuclei, globular clusters) and illuminate a potential pathway to produce supermassive black holes. Ground-based gravitational-wave detectors are sensitive to a subset of such mergers and have been used to detect one 142 +28 −16 M intermediate-mass black hole formation event. However, ground-based detector data contain numerous incoherent short duration noise transients that can mimic the gravitational-wave signals from merging intermediate-mass black holes, limiting the sensitivity of searches. Here we search for binary black hole mergers using a Bayesian-inspired ranking statistic which measures the coherence or incoherence of triggers in multiple-detector data. We use this statistic to identify candidate events with lab-frame total masses 55 M using data from LIGO's second observing run. Our analysis does not yield evidence for new intermediate-mass black holes. However, we find support for some stellar-mass binary black holes not reported in the first LIGO-Virgo gravitational-wave transient catalog, GWTC-1.

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Evolution of binary black holes in AGN accretion discs: Disc-binary interaction and gravitational wave emission

Cited by 24 publications

References 52 publications

New binary black hole mergers in the LIGO--Virgo O3a data

New binary black hole mergers in the LIGO--Virgo O3a data

The Cosmic Evolution of Binary Black Holes in Young, Globular and Nuclear Star Clusters: Rates, Masses, Spins and Mixing Fractions

A search for intermediate-mass black holes mergers in the second LIGO--Virgo observing run with the Bayes Coherence Ratio

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