Constraining the primordial black hole scenario with Bayesian inference and machine learning: The GWTC-2 gravitational wave catalog

Wong, Kaze W. K.; Franciolini, Gabriele; Luca, Valerio De; Baibhav, Vishal; Berti, Emanuele; Pani, Paolo; Riotto, Antonio

doi:10.1103/physrevd.103.023026

Cited by 130 publications

(102 citation statements)

References 119 publications

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“…This scenario is compatible with the gravitational waves detected during the O1/O2 and O3 observational runs [7][8][9][10] of the LIGO/Virgo Collaboration, and has motivated several studies on the primordial origin of these events [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In particular, the GWTC-2 catalog is found to be compatible with the primordial scenario [27] and a possible detection of a stochastic gravitational wave background by the NANOGrav collaboration [28] could be ascribed to PBHs [29][30][31][32][33][34].…”

Section: Introductionsupporting

confidence: 68%

Primordial black hole formation for an anisotropic perfect fluid: initial conditions and estimation of the threshold

Musco,

Papanikolaou

2021

Preprint

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Section: Introductionsupporting

confidence: 68%

Primordial black hole formation for an anisotropic perfect fluid: initial conditions and estimation of the threshold

Musco,

Papanikolaou

2021

Preprint

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“…Numerous attempts have been made to leverage GW observations for characterizing the branching fractions between these channels or constraining uncertain physical processes governing these channels (Stevenson et al 2015;Rodriguez et al 2016b;Farr et al 2017a,b;Mandel et al 2017;Stevenson et al 2017a;Talbot & Thrane 2017;Vitale et al 2017;Zevin et al 2017;Barrett et al 2018;Taylor & Gerosa 2018;Arca Sedda & Benacquista 2019;Powell et al 2019;Roulet & Zaldarriaga 2019;Wysocki et al 2019;Abbott et al 2020c;Antonini & Gieles 2020a;Arca Sedda et al 2020;Baibhav et al 2020;Bavera et al 2020a;Bouffanais et al 2020;Farmer et al 2020;Fishbach & Holz 2020;Hall et al 2020;Kimball et al 2020a,b;Roulet et al 2020;Safarzadeh 2020;Wong et al 2020Wong et al , 2021Bhagwat et al 2021). However, due to the high complexity and dimensionality of the problem, these studies often restrict themselves to targeting a single channel or a small subset of channels.…”

Section: Introductionmentioning

confidence: 99%

One Channel to Rule Them All? Constraining the Origins of Binary Black Holes Using Multiple Formation Pathways

Zevin

Bavera

Berry

et al. 2021

ApJ

292

259

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The second LIGO-Virgo catalog of gravitational-wave (GW) transients has more than quadrupled the observational sample of binary black holes. We analyze this catalog using a suite of five state-of-the-art binary black hole population models covering a range of isolated and dynamical formation channels and infer branching fractions between channels as well as constraints on uncertain physical processes that impact the observational properties of mergers. Given our set of formation models, we find significant differences between the branching fractions of the underlying and detectable populations, and that the diversity of detections suggests that multiple formation channels are at play. A mixture of channels is strongly preferred over any single channel dominating the detected population: an individual channel does not contribute to more than 70% of the observational sample of binary black holes. We calculate the preference between the natal spin assumptions and common-envelope efficiencies in our models, favoring natal spins of isolated black holes of 0.1, and marginally preferring common-envelope efficiencies of 2.0 while strongly disfavoring highly inefficient common envelopes. We show that it is essential to consider multiple channels when interpreting GW catalogs, as inference on branching fractions and physical prescriptions becomes biased when contributing formation scenarios are not considered or incorrect physical prescriptions are assumed. Although our quantitative results can be affected by uncertain assumptions in model predictions, our methodology is capable of including models with updated theoretical considerations and additional formation channels.

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“…Besides, the current observational constraints do not exclude the existence of a substantial amount of PBHs in several interesting "mass windows" [330][331][332][333][334][335][336][337][338][339][340][341][342][343][344][345], which can yield fruitful phenomena. For instance, the LIGO O3a data set of LIGO/Virgo implies that there might be two populations of black holes [346], which can be explained by the combination of the astrophysical black holes and PBHs of ∼20 solar mass [347][348][349]. PBHs might be the supermassive or stupendously large BHs which seed the galaxy or even structure formation [350][351][352][353][354][355][356].…”

Section: Induced Gravitational Wavesmentioning

confidence: 99%

The Gravitational-wave physics II: Progress

Bian

Cai

Cao

et al. 2021

Sci. China Phys. Mech. Astron.

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It has been a half-decade since the first direct detection of gravitational waves, which signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave cosmology. The increasing number of the detected gravitational-wave events has revealed the promising capability of constraining various aspects of cosmology, astronomy, and gravity. Due to the limited space in this review article, we will briefly summarize the recent progress over the past five years, but with a special focus on some of our own work for the Key Project "Physics associated with the gravitational waves" supported by the National Natural Science Foundation of China. In particular, (1) we have presented the mechanism of the gravitational-wave production during some physical processes of the early Universe, such as inflation, preheating and phase transition, and the cosmological implications of gravitational-wave measurements; (2) we have put constraints on the neutron star maximum mass according to GW170817 observations; (3) we have developed a numerical relativity algorithm based on the finite element method and a waveform model for the binary black hole coalescence along an eccentric orbit.

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Constraining the primordial black hole scenario with Bayesian inference and machine learning: The GWTC-2 gravitational wave catalog

Cited by 130 publications

References 119 publications

Primordial black hole formation for an anisotropic perfect fluid: initial conditions and estimation of the threshold

Primordial black hole formation for an anisotropic perfect fluid: initial conditions and estimation of the threshold

One Channel to Rule Them All? Constraining the Origins of Binary Black Holes Using Multiple Formation Pathways

The Gravitational-wave physics II: Progress

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