GW190425, GW190521 and GW190814: Three candidate mergers of primordial black holes from the QCD epoch

Clesse, S.; García-Bellido, J.

doi:10.1016/j.dark.2022.101111

Cited by 49 publications

(32 citation statements)

References 53 publications

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“…We use the Whittle likelihood approximation in the frequency domain for the residual of the data minus the astrophysical signal. 4 Here, the goal of our analysis will be to compute the posterior probability of θ for a series of simulated signals. In this work, we use the nested sampling algorithm [68,69] implemented by dynesty [70] to estimate p(θ|d).…”

Section: Jcap11(2023)039mentioning

confidence: 99%

“…If some fraction of dark matter is composed of black holes, or gravitationally collapses to form black holes, gravitational waves (GWs) may offer the opportunity to directly probe the nature of dark matter. Recent work has proposed that previous GW signals consistent with stellarmass black holes can be sourced from black holes with a primordial origin [1][2][3][4], however, there is currently no preference for those formation models over astrophysical channels [2,3,[5][6][7][8][9][10][11]. For current-and next-generation ground-based gravitational-wave detectors like Advanced LIGO [12], Advanced Virgo [13], KAGRA [14], Cosmic Explorer [15], and the Einstein Telescope [16], cleaner targets for dark matter searches may be compact object mergers involving a black hole with mass ≲ 1 M ⊙ .…”

Section: Jcap11(2023)039 1 Introductionmentioning

confidence: 99%

“…Other structures, like cosmic loops [34], bubbles of broken symmetry [35], and domain walls [36] could also collide or collapse to form primordial black holes. Additionally, the spectrum of PBH masses would be sensitive to accretion physics [18], and their formation into binaries depends on their clustering dynamics [37][38][39][40][41][42] and their merger rate which are theoretically uncertain [4,43].…”

Section: Jcap11(2023)039 1 Introductionmentioning

confidence: 99%

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Too small to fail: characterizing sub-solar mass black hole mergers with gravitational waves

Wolfe,

Vitale,

Talbot

2023

J. Cosmol. Astropart. Phys.

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The detection of a sub-solar mass black hole could yield dramatic new insights into the nature of dark matter and early-Universe physics, as such objects lack a traditional astrophysical formation mechanism. Gravitational waves allow for the direct measurement of compact object masses during binary mergers, and we expect the gravitational-wave signal from a low-mass coalescence to remain within the LIGO frequency band for thousands of seconds. However, it is unclear whether one can confidently measure the properties of a sub-solar mass compact object and distinguish between a sub-solar mass black hole or other exotic objects. To this end, we perform Bayesian parameter estimation on simulated gravitational-wave signals from sub-solar mass black hole mergers to explore the measurability of their source properties. We find that the LIGO/Virgo detectors during the O4 observing run would be able to confidently identify sub-solar component masses at the threshold of detectability; these events would also be well-localized on the sky and may reveal some information on their binary spin geometry. Further, next-generation detectors such as Cosmic Explorer and the Einstein Telescope will allow for precision measurement of the properties of sub-solar mass mergers and tighter constraints on their compact-object nature.

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Section: Jcap11(2023)039mentioning

confidence: 99%

Section: Jcap11(2023)039 1 Introductionmentioning

confidence: 99%

Section: Jcap11(2023)039 1 Introductionmentioning

confidence: 99%

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Too small to fail: characterizing sub-solar mass black hole mergers with gravitational waves

Wolfe,

Vitale,

Talbot

2023

J. Cosmol. Astropart. Phys.

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“…PBHs could have a lot of implications in our Universe, like being the seeds of supermassive black holes [9][10][11], generating large-scale structures [12,13], ultra-faint dwarf galaxies [14] or changing the thermal history of the Universe [15]. But probably the most remarkable implication is that they can constitute a significant fraction or even the totality of the dark matter [2][3][4][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Simulations of PBH formation at the QCD epoch and comparison with the GWTC-3 catalog

Escrivà

Bagui

Clesse

2023

J. Cosmol. Astropart. Phys.

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The probability of primordial black hole (PBH) formation is known to be boosted during the Quantum Chromodynamics (QCD) crossover due to a slight reduction of the equation of state. This induces a high peak and other features in the PBH mass distribution. But the impact of this variation during the process of PBH formation has so far not been considered in numerical simulations. In this work we simulate the formation of PBHs by taking into account the varying equation of state at the QCD epoch, compute the over-density threshold using different curvature profiles and find that the resulting PBH mass distributions are significantly impacted. The expected merger rate distributions of early and late PBH binaries is comparable to the ones inferred from the GWTC-3 catalog for dark matter fractions in PBHs within 0.1 < f PBH < 1. The distribution of gravitational-wave events estimated from the volume sensitivity could explain mergers around 30–50 M ⊙, with asymmetric masses like GW190814, or in the pair-instability mass gap like GW190521. However, none of the considered cases leads to a multi-modal distribution with a secondary peak around 8–15 M ⊙, as suggested by the GWTC-3 catalog, possibly pointing to a mixed population of astrophysical and primordial black holes.

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“…There is not yet definite proof of the existence of PBHs, but recently, gravitational wave (GW) observation of binary black hole (BBH) mergers is providing rich information on the BH population [14]. Some analysis based on the mass and rate distributions [15][16][17][18][19][20][21] or spin properties [22,23] suggests that the observed BBHs could be primordial origin.…”

Section: Introductionmentioning

confidence: 99%

The Stochastic Gravitational Wave Background from Close Hyperbolic Encounters of Primordial Black Holes in Dense Clusters

García-Bellido¹,

Jaraba²,

Kuroyanagi³

2022

SSRN Journal

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GW190425, GW190521 and GW190814: Three candidate mergers of primordial black holes from the QCD epoch

Cited by 49 publications

References 53 publications

Too small to fail: characterizing sub-solar mass black hole mergers with gravitational waves

Too small to fail: characterizing sub-solar mass black hole mergers with gravitational waves

Simulations of PBH formation at the QCD epoch and comparison with the GWTC-3 catalog

The Stochastic Gravitational Wave Background from Close Hyperbolic Encounters of Primordial Black Holes in Dense Clusters

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