Rapid merger of binary primordial black holes: An implication for GW150914

Hayasaki, Kimitake; Takahashi, Keitaro; Sendouda, Yuuiti; Nagataki, Shigehiro

doi:10.1093/pasj/psw065

Cited by 35 publications

(38 citation statements)

References 57 publications

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“…• They may interact with a circumbinary accretion disk of baryons [57][58][59][60]. As we have seen in our simulations, catastrophic feedback between the PBHs and their DM halos is a key feature of the binaries.…”

Section: Discussionmentioning

confidence: 62%

Merger rate of a subdominant population of primordial black holes

2018

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The formation of astrophysical and primordial black holes influences the distribution of dark matter surrounding them. Black holes are thus expected to carry a dark matter 'dress' whose properties depend on their formation mechanism and on the properties of the environment. Here we carry out a numerical and analytical study of the merger of dressed black holes, and show that the distribution of dark matter around them dramatically affects the dynamical evolution of the binaries. Although the final impact on the merger rate of primordial black holes is rather small with respect to the case of 'naked' black holes, we argue that our analysis places the calculation of this rate on more solid ground, with LIGO-Virgo observations ruling out a dark matter fraction of 10 −3 for primordial black holes of 100 solar masses, and it paves the way to more detailed analyses of environmental effects induced by dark matter on the gravitational wave emission of binary black holes.

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Section: Discussionmentioning

confidence: 62%

Merger rate of a subdominant population of primordial black holes

2018

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“…Then, a large number of stellar-mass BH candidates in nearby galaxies should be detected by x-ray observations. Moreover, PBH binaries should emit gravitational waves that could be detected by future gravitational wave experiments such as LIGO, DECIGO and eLISA [70,71]. Finally, x-ray photons that are emitted by PBHs at high redshifts should affect the reionization of the nearby intergalactic medium and leave imprints on the 21 cm signal from the reionization and the late dark ages [67].…”

Section: Resultsmentioning

confidence: 99%

“…The signal induced by PBHs in the mass range 10 19 kg ≲ M PBH ≲ 10 25 kg and contributing to more than one percent dark matter should be detected [69]. Binaries of PBHs forming a fraction of dark matter should emit gravitational waves; this results in a background of gravitational waves that could be observed by LIGO, DECIGO and eLISA [70][71][72].…”

Section: Primordial Black Holes and Observational Constraintsmentioning

confidence: 99%

Massive primordial black holes from hybrid inflation as dark matter and the seeds of galaxies

2015

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In this paper we present a new scenario where massive primordial black holes (PBHs) are produced from the collapse of large curvature perturbations generated during a mild-waterfall phase of hybrid inflation. We determine the values of the inflaton potential parameters leading to a PBH mass spectrum peaking on planetarylike masses at matter-radiation equality and producing abundances comparable to those of dark matter today, while the matter power spectrum on scales probed by cosmic microwave background (CMB) anisotropies agrees with Planck data. These PBHs could have acquired large stellar masses today, via merging, and the model passes both the constraints from CMB distortions and microlensing. This scenario is supported by Chandra observations of numerous BH candidates in the central region of Andromeda. Moreover, the tail of the PBH mass distribution could be responsible for the seeds of supermassive black holes at the center of galaxies, as well as for ultraluminous x-ray sources. We find that our effective hybrid potential can originate e.g. from D-term inflation with a Fayet-Iliopoulos term of the order of the Planck scale but sub-Planckian values of the inflaton field. Finally, we discuss the implications of quantum diffusion at the instability point of the potential, able to generate a Swiss-cheese-like structure of the Universe, eventually leading to apparent accelerated cosmic expansion.

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“…The accretion of dark matter and baryonic gas onto the PBH binaries was investigated in [252]. According to this study, the continuous accumulation of matter onto the binaries can rapidly decrease the binary radius by the dynamical friction and the merger may happen in the early Universe.…”

Section: Pbh Binaries Formed In the Early Universementioning

confidence: 99%

Primordial black holes—perspectives in gravitational wave astronomy

Sasaki¹,

Suyama²,

Tanaka³

et al. 2018

Class. Quantum Grav.

883

989

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This is a review article on the primordial black holes (PBHs), with particular focus on the massive ones ( 10 15 g) which have not evaporated by the present epoch by the Hawking radiation. By the detections of gravitational waves by LIGO, we have gained a completely novel tool to observationally search for PBHs complementary to the electromagnetic waves. Based on the perspective that gravitational-wave astronomy will make a significant progress in the next decades, a purpose of this article is to give a comprehensive review covering a wide range of topics on PBHs. After discussing PBH formation as well as several inflation models leading to PBH production, we summarize various existing and future observational constraints. We then present topics on formation of PBH binaries, gravitational waves from PBH binaries, various observational tests of PBHs by using gravitational waves.

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Rapid merger of binary primordial black holes: An implication for GW150914

Cited by 35 publications

References 57 publications

Merger rate of a subdominant population of primordial black holes

Merger rate of a subdominant population of primordial black holes

Massive primordial black holes from hybrid inflation as dark matter and the seeds of galaxies

Primordial black holes—perspectives in gravitational wave astronomy

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