Clustering of primordial black holes: Basic results

Chisholm, James

doi:10.1103/physrevd.73.083504

Cited by 96 publications

(126 citation statements)

References 77 publications

(84 reference statements)

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“…Moreover, within a generic broad mass distribution of PBHs, as produced in our scenario, it is natural that PBHs formed in the early Universe and cluster during the radiation era [99,100]. Furthermore it is possible that a significant fraction of the smaller mass BHs grow to become IMBHs, which could be responsible for the observed ultraluminous x-ray sources [101][102][103][104].…”

Section: The Seed Of Supermassive Black Holesmentioning

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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Section: The Seed Of Supermassive Black Holesmentioning

confidence: 99%

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

2015

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“…Successive mergers of PBHs discussed in this paper could also explain the existence of the binary black holes with such intermediate masses. If the spectrum of density perturbation is broad rather than monochromatic as assumed here, clusters of PBHs can be formed (Chisholm 2006). If this is the case, PBH mergers may occur frequently in clusters to form much larger black holes than the original PBHs (Clesse & Garcia-Bellido 2016;Bird et al 2016).…”

Section: +4mentioning

confidence: 99%

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

Hayasaki

Takahashi

Sendouda

et al. 2016

Publications of the Astronomical Society of Japan

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We propose a new scenario for the evolution of a binary of primordial black holes (PBHs). We consider a dynamical friction by ambient dark matter, scattering of dark matter particles with a highly eccentric orbit besides the standard two-body relaxation process to refill the loss cone, and interaction between the binary and a circumbinary disk, assuming that PBHs do not constitute the bulk of dark matter. Binary PBHs lose the energy and angular momentum by these processes, which could be sufficiently efficient for a typical configuration. Such a binary coalesces due to the gravitational wave emission in a time scale much shorter than the age of the universe. We estimate the density parameter of the resultant gravitational wave background. Astrophysical implication concerning the formation of intermediate-mass to supermassive black holes is also discussed.

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“…For a discussion of the consequences of clustering, see Chisholm (2006). Formation via domain wall collapse, as discussed in Dokuchaev et al (2004), may also lead to clustering, without relying on initial dark matter perturbations.…”

Section: Primordial Black Hole Productionmentioning

confidence: 99%

Growth of Structure Seeded by Primordial Black Holes

Mack

Ostriker

Ricotti

2007

ApJ

157

187

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We discuss the possibilities for the growth of primordial black holes (PBHs) via the accretion of dark matter. In agreement with previous works, we find that accretion during the radiation-dominated era does not lead to a significant mass increase. However, during matter domination, PBHs may grow by up to 2 orders of magnitude in mass through the acquisition of large dark matter halos. We discuss the possibility of PBHs being an important component in dark matter halos of galaxies, as well as their potential to explain the ultraluminous X-ray sources (ULXs) observed in nearby galactic disks. We point out that although PBHs are ruled out as the dominant component of dark matter, there is still a great deal of parameter space that is open to their playing a role in the modern-day universe. For example, a primordial halo population of PBHs each at 10 2.5 M , making up 0.1% of the dark matter, grows to 10 4.5 M via the accumulation of dark matter halos and accounts for $10% of the dark matter mass by a redshift of z % 30. These intermediate-mass black holes may then ''light up'' when passing through molecular clouds, becoming visible as ULXs at the present day, or they may form the seeds for supermassive black holes at the centers of galaxies.

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Clustering of primordial black holes: Basic results

Cited by 96 publications

References 77 publications

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

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

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

Growth of Structure Seeded by Primordial Black Holes

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