Evidence for primordial black hole dark matter from LIGO/Virgo merger rates

Jedamzik, Karsten

doi:10.48550/arxiv.2007.03565

Cited by 27 publications

(36 citation statements)

References 47 publications

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“…which is defined in terms of the current age of the universe t 0 , the total mass of the binary M tot = m 1 + m 2 and the PBH mass function ψ(m) at formation. The suppression factor S (M tot , f PBH , ψ) ≡ S 1 × S 2 takes into account the reduction of the PBH merger rate arising from interactions with surrounding inhomogeneities in the dark matter fluid and neighbouring PBHs [7,10] around the binary formation epoch, while the second term S 2 tracks the successive disruption of binaries in clusters or sub-structure environments [13,20,33,44,[47][48][49],…”

Section: The Pbh Merger Ratementioning

confidence: 99%

The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors

De Luca,

Franciolini,

Pani

et al. 2021

Preprint

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The next generation of gravitational-wave experiments, such as Einstein Telescope, Cosmic Explorer and LISA, will test the primordial black hole scenario. We provide a forecast for the minimum testable value of the abundance of primordial black holes as a function of their masses for both the unclustered and clustered spatial distributions at formation. In particular, we show that these instruments may test abundances, relative to the dark matter, as low as 10 −10 .

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Section: The Pbh Merger Ratementioning

confidence: 99%

The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors

De Luca,

Franciolini,

Pani

et al. 2021

Preprint

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“…Does the currently extant data provide some insight into this issue? The recent GW compact object merger events have sparked research on this and related topics [65][66][67].…”

Section: Arxiv:200812780v1 [Astro-phhe] 28 Aug 2020mentioning

confidence: 99%

Test for the Origin of Solar Mass Black Holes

2021

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Solar-mass black holes are not expected from conventional stellar evolution, but can be produced naturally via neutron star (NS) implosions induced by capture of small primordial black holes (PBHs) or from accumulation of some varieties of particle dark matter (DM). We argue that a unique signature of such "transmuted" solar-mass BHs is that their mass distribution would follow that of the NSs. This would be distinct from the mass function of black holes in the solar-mass range predicted either by conventional stellar evolution or early universe PBH production. We propose that analysis of the solar-mass BH population mass distribution within a narrow mass window of ∼ 1 − 2.5 M can provide a simple yet powerful test of the origin of these BHs. Recent LIGO/VIRGO gravitational wave (GW) observations of the binary merger events GW190425 and GW190814 are consistent with a BH mass in the range ∼ 1.5 − 2.6 M . Though these results have fueled speculation on dark matter-transmuted solar-mass BHs, we demonstrate that it is unlikely that the origin of these particular events stems from NS implosions. Data from upcoming GW observations will be able to distinguish between solar-mass BHs and NSs with high confidence. This capability will facilitate and enhance the efficacy of our proposed test.

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“…In particular, if their masses are in the 10 M M 100 M range, they could potentially account for some of the detected gravitational-wave merger events in the Laser Interferometer Gravitational-Wave Observatory [3] (LIGO), see for example Refs. [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Constraining Primordial Black Hole Dark Matter with CHIME Fast Radio Bursts

Krochek,

Kovetz

2021

Preprint

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Strong lensing of Fast Radio Bursts (FBRs) has been proposed as a relatively clean probe of primordial black hole (PBH) dark matter. Recently, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) published a first catalog of 536 FRBs, 62 of which are from repeating sources. In light of this new data, we re-examine the prospects to constrain the abundance of PBHs via FRBs. Extending previous forecasts, we calculate a PBH dark matter bound using the intrinsic burst width and a calibrated flux-ratio threshold per FRB. In addition, we take into account the uncertainty in the relation between the FRB dispersion measure and source redshift. We outline an algorithm to detect lensed FRBs and a method to simulate its performance on real data and set a flux-ratio threshold for each event, which we use to infer realistic forecasts. We then attempt to extract a preliminary bound using the publicly available CHIME data. Unfortunately, both instrumental noise and the provided ∼ 1 ms time-resolution of the public data hinder this effort. We identify one candidate event where a double burst could be explained via strong lensing by a O(10 M )-mass PBH, which will require follow-up study at higher time resolution to either confirm or discard. We show that with a few times the size of the first catalog-sampled at the full instrumental timeresolution so that candidates can be efficiently scrutinized-CHIME will be able to find strong evidence for or robustly rule out PBHs with mass above ∼ 10 M as the dark matter. Finally, we demonstrate that stacking repeating FRBs can improve the constraints, especially for lower masses.

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Evidence for primordial black hole dark matter from LIGO/Virgo merger rates

Cited by 27 publications

References 47 publications

The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors

The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors

Test for the Origin of Solar Mass Black Holes

Constraining Primordial Black Hole Dark Matter with CHIME Fast Radio Bursts

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