Dark matter density spikes around primordial black holes

@article{Eroshenko2016DarkMD,
  title={Dark matter density spikes around primordial black holes},
  author={Yu. N. Eroshenko},
  journal={Astronomy Letters},
  year={2016},
  volume={42},
  pages={347-356}
}
We show that density spikes begin to form from dark matter particles around primordial black holes immediately after their formation at the radiation-dominated cosmological stage. This stems from the fact that in the thermal velocity distribution of particles there are particles with low velocities that remain in finite orbits around black holes and are not involved in the cosmological expansion. The accumulation of such particles near black holes gives rise to density spikes. These spikes are… 
Dark matter around primordial black hole at the radiation-dominated stage
  • Y. Eroshenko
  • Physics
    International Journal of Modern Physics A
  • 2020
The accumulation of dark matter particles near the primordial black holes starts at the radiation-dominated cosmological stage and produces the central density spikes. The spikes can be the bright
In-depth analysis of the clustering of dark matter particles around primordial black holes. Part I. Density profiles
Primordial black holes may have been produced in the early stages of the thermal history of the Universe after cosmic inflation. If so, dark matter in the form of elementary particles can be
Neutrino point source searches for dark matter spikes
Any dark matter spikes surrounding black holes in our Galaxy are sites of significant dark matter annihilation, leading to a potentially detectable neutrino signal. In this paper we examine 10−105M
Intermediate mass black holes and dark matter at the Galactic center
Could there be a large population of intermediate-mass black holes (IMBHs) formed in the early universe? Whether primordial or formed in Population III, these are likely to be very subdominant
Constraints on primordial black holes
TLDR
The constraints on the fraction of the Universe that may have gone into primordial black holes (PBHs) over the mass range 10−5 to 1050 g are updated and even if PBHs make a small contribution to the DM, they could play an important cosmological role and provide a unique probe of the early Universe.
Measuring the dark matter environments of black hole binaries with gravitational waves
Large dark matter overdensities can form around black holes of astrophysical and primordial origin as they form and grow. This “dark dress” inevitably affects the dynamical evolution of binary
Dark Matter Signatures of Supermassive Black Hole Binaries
A natural consequence of the galaxy formation paradigm is the existence of supermassive black hole (SMBH) binaries. Gravitational perturbations from a far-away SMBH companion can induce high orbital
Can primordial black holes as all dark matter explain fast radio bursts?
Primordial black holes (PBHs) are one of the most interesting non-particle dark matter (DM) candidates. They may explain all the DM content in the Universe in the mass regime about 10−14M − 10−11M .
Detecting dark matter around black holes with gravitational waves: Effects of dark-matter dynamics on the gravitational waveform
A dark matter overdensity around a black hole may significantly alter the dynamics of the black hole's merger with another compact object. We consider here intermediate mass-ratio inspirals of
Constraints on mixed dark matter model of particles and primordial black holes from the Galactic 511 keV line
The 511 keV line was first detected in 1970's but its origin is still unknown. It was proposed that positrons from dark matter (DM) particles in the halo of galaxy are possible sources. We consider a
...
...

References

SHOWING 1-10 OF 67 REFERENCES
Signatures of primordial black hole dark matter
The nonbaryonic dark matter of the Universe is assumed to consist of new stable forms of matter. Their stability reflects symmetry of micro world and mechanisms of its symmetry breaking. In the early
The Primordial black hole mass spectrum
We examine what mass spectrum of primordial black holes should result if the early universe consisted of small density fluctuations superposed on a Friedmann background. It is shown that only a
Constraints on primordial black holes as dark matter candidates from capture by neutron stars
We investigate constraints on primordial black holes (PBHs) as dark matter candidates that arise from their capture by neutron stars (NSs). If a PBH is captured by a NS, the star is accreted onto the
Primordial Black Holes as Dark Matter: Almost All or Almost Nothing
Primordial black holes (PBHs) are expected to accrete particle dark matter around them to form ultracompact minihalos (UCMHs), if the PBHs themselves are not most of the dark matter. We show that if
Growth of Structure Seeded by Primordial Black Holes
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
New cosmological constraints on primordial black holes
We update the constraints on the fraction of the Universe going into primordial black holes in the mass range 10{sup 9}-10{sup 17} g associated with the effects of their evaporations on big bang
Stochastic Correlation Model of Galactic Bulge Velocity Dispersions and Central Black Holes Masses
We consider the cosmological model in which a part of the Universe \Omega_h\sim 10^-5 is in the form of primordial black holes with mass \sim 10^5M_\odot. These primordial black holes would be
Generalised constraints on the curvature perturbation from primordial black holes
Primordial black holes (PBHs) can form in the early Universe via the collapse of large density perturbations. There are tight constraints on the abundance of PBHs formed due to their gravitational
The Structure of cold dark matter halos
High resolution N-body simulations show that the density profiles of dark matter halos formed in the standard CDM cosmogony can be fit accurately by scaling a simple “universal” profile. Regardless
...
...