arXiv : Seven Hints for Primordial Black Hole Dark Matter

Clesse, Sebastien; García-Bellido, Juan

doi:10.1016/j.dark.2018.08.004

Article
Report number	arXiv:1711.10458 ; IFT-UAM-CSIC-17-108 ; CERN-TH-2017-239
Title	Seven Hints for Primordial Black Hole Dark Matter
Related title	Seven Hints for Primordial Black Hole Dark Matter
Author(s)	Clesse, Sebastien (Louvain U., CP3 ; Namur U. ; RWTH Aachen U.) ; García-Bellido, Juan (Madrid, IFT ; CERN)
Publication	2018-12
Imprint	2017-11-28
Number of pages	10
Note	12 pages, 3 figures, appendix added
In:	Phys. Dark Univ. 22 (2018) 137-146
DOI	10.1016/j.dark.2018.08.004
Subject category	hep-th ; Particle Physics - Theory ; gr-qc ; General Relativity and Cosmology ; astro-ph.GA ; Astrophysics and Astronomy ; astro-ph.CO ; Astrophysics and Astronomy
Abstract	Seven observations point towards the existence of primordial black holes (PBH), constituting the whole or an important fraction of the dark matter in the Universe: the mass and spin of black holes detected by Advanced LIGO/VIRGO, the detection of micro-lensing events of distant quasars and stars in M31, the non-detection of ultra-faint dwarf satellite galaxies with radius below 15 parsecs, evidences for core galactic dark matter profiles, the correlation between X-ray and infrared cosmic backgrounds, and the existence of super-massive black holes very early in the Universe's history. Some of these hints are newly identified and they are all intriguingly compatible with the re-constructed broad PBH mass distribution from LIGO events, peaking on PBH mass $m_{\rm PBH} \approx 3 M_\odot$ and passing all other constraints on PBH abundances. PBH dark matter also provides a new mechanism to explain the mass-to-light ratios of dwarf galaxies, including the recent detection of a diffuse galaxy not dominated by dark matter. Finally we conjecture that between 0.1% and 1% of the events detected by LIGO will involve a PBH with a mass below the Chandrasekhar mass, which would unambiguously prove the existence of PBH.
Copyright/License	Elsevier B.V. (License: arXiv nonexclusive-distrib. 1.0)

$Reconstruction of the PBH mass spectrum assuming a log-normal density distribution of mean $\mu$ and width $\sigma$, for the extended halo mass function (Ext.HMF, left panel) and the dominant clustering scale (DCS, right panel) models. The color scale of the MCMC points represent the model merger rates in units of $\rm{Gpc^{-3} yr^{-1}}$. The shaded blue region is the parameter space excluded by the dynamical heating of star clusters in the faint dwarf galaxy Eridanus II, assuming it has a central $6500 M_\odot$ IMBH (solid blue), or not (dashed blue). M31 and quasar microlensing events favor the regions between the red and green dashed lines respectively.$ $Reconstruction of the PBH mass spectrum assuming a log-normal density distribution of mean $\mu$ and width $\sigma$, for the extended halo mass function (Ext.HMF, left panel) and the dominant clustering scale (DCS, right panel) models. The color scale of the MCMC points represent the model merger rates in units of $\rm{Gpc^{-3} yr^{-1}}$. The shaded blue region is the parameter space excluded by the dynamical heating of star clusters in the faint dwarf galaxy Eridanus II, assuming it has a central $6500 M_\odot$ IMBH (solid blue), or not (dashed blue). M31 and quasar microlensing events favor the regions between the red and green dashed lines respectively.$ $Single merging event likelihood for a PBH model with a braod log-normal density spectrum with central value $\mu = 2.5 \Msun$ and width $\sigma = 0.5$. The best-fit BH masses of LIGO merging events are represented by the black points.$ Show more plots

Corresponding record in: Inspire

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ჩანაწერი შექმნილია 2017-11-29, ბოლოს შესწორებულია 2025-07-20

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