Evolution of a primordial binary black hole due to interaction with cold dark matter and the formation rate of gravitational wave events

Пилипенко, С. В.; Tkachev, M. V.; Ivanov, P. B.

doi:10.1103/physrevd.105.123504

Cited by 12 publications

(11 citation statements)

References 45 publications

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“…This is especially true for very asymmetric binaries, which potentially has implications for searches for dressed PBH IMRIs and EMRIs. These results strongly disagree with [56,57] in the sense that the presence of DM spikes around PBHs might only leads to increase the merger rates of PBH binaries. We would also like to point out that the focus of our numerical results was on the present-day merger rates of PBH binaries.…”

Section: Discussioncontrasting

confidence: 64%

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Impact of dark matter spikes on the merger rates of Primordial Black Holes

Jangra,

Kavanagh,

Diego

2023

J. Cosmol. Astropart. Phys.

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Mergers of Primordial Black Holes (PBHs) may contribute to the gravitational wave mergers detected by the LIGO-Virgo-KAGRA (LVK) Collaboration. We study the dynamics of PBH binaries dressed with dark matter (DM) spikes, for PBHs with extended mass functions. We analyze the impact of DM spikes on the orbital parameters of the PBH binaries formed in the early Universe and calculate their merger rates at the age of the Universe today. We consider two possible scenarios for the dynamics of the dressed binaries: assuming that either the DM spikes are completely evaporated from the binaries before merger or they remain static until the merger. Contrary to previous studies, we find that the presence of spikes may increase or decrease the present-day PBH merger rates, in some cases dramatically. Comparing with merger rates reported by the LVK Collaboration in the third Gravitational Wave Transient Catalog (GWTC-3), we derive approximate constraints on the fraction of Solar-mass PBHs in cold dark matter as f pbh ≤ 𝒪(10-5–10-3), depending on the mass function. Our calculations are valid only for the idealized scenarios in which the DM spikes are either evaporated or static. However, they suggest that the impact of DM spikes on PBH merger rates may be more complicated than previously thought and motivate the development of a more general description of the merger dynamics, including feedback of the DM spikes in highly eccentric PBH binaries.

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Section: Discussioncontrasting

confidence: 64%

“…Taking this into account, ref. [57] showed that the merger rate of PBH binaries with DM spikes may be as much as 6-8 times larger than PBH binaries without DM spikes.…”

Section: Introductionmentioning

confidence: 99%

Impact of dark matter spikes on the merger rates of Primordial Black Holes

Jangra,

Kavanagh,

Diego

2023

J. Cosmol. Astropart. Phys.

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“…Taking such mergers into account would lead to stronger sensitivity, though the partial overlap of halo mass profiles of DM and luminous matter renders such mergers subdominant. Specific clustering of COs (as recently discussed for PBHs in [28]) may also increase the merger rate and therefore modify our results. Moreover, we have only considered the inspiral regime of compact object mergers.…”

Section: Discussionmentioning

confidence: 55%

Gravitational wave constraints on extended dark matter structures

2023

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“…Taking such mergers into account would lead to stronger sensitivity, though the partial overlap of halo mass profiles of DM and luminous matter renders such mergers subdominant. Then, specific clustering of COs (as recently discussed for PBHs in [23]) may also increase the merger rate and therefore modify our results.…”

Section: Discussionmentioning

confidence: 59%