TY - JOUR
T1 - Seven hints for primordial black hole dark matter
AU - Clesse, Sébastien
AU - García-Bellido, Juan
N1 - Funding Information:
This work is supported by the Spanish Research Project FPA2015-68048-C3-3-P [MINECO-FEDER] and the Centro de Excelencia Severo Ochoa Program , Spain SEV-2012-0597 . JGB thanks the Theory Department at CERN , Switzerland for their hospitality during a Sabbatical year at CERN. He also acknowledges support from the Salvador de Madariaga Program , Spain Ref. PRX17/00056 . The work of S.C. is supported by the Belgian Fund for Research FRS-FNRS through a Chargé de Recherche grant.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - 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 [Formula presented] 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.
AB - 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 [Formula presented] 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.
KW - Primordial black holes
KW - Dark Matter
UR - http://www.scopus.com/inward/record.url?scp=85055269459&partnerID=8YFLogxK
U2 - 10.1016/j.dark.2018.08.004
DO - 10.1016/j.dark.2018.08.004
M3 - Article
SN - 2212-6864
VL - 22
SP - 137
EP - 146
JO - Physics of the Dark Universe
JF - Physics of the Dark Universe
ER -