Massive Primordial Black Holes as Dark Matter and their detection with Gravitational Waves
By Juan García-Bellido. 2017
188 citations recorded by the source corpus.
Massive Primordial Black Holes (MPBH) can be formed after inflation due to broad peaks in the primordial curvature power spectrum that collapse gravitationally during the radiation era, to form clusters of black holes that merge and increase in mass after recombination, generating today a broad mass-spectrum of black holes with masses ranging from 0.01 to 105 M⊙. These MPBH could act as seeds for galaxies and quick-start structure formation, initiating reionization, forming galaxies at redshift z > 10 and clusters at z > 1. They may also be the seeds on which SMBH and IMBH form, by accreting gas onto them and forming the centers of galaxies and quasars at high redshift. They form at rest with zero spin and have negligible cross-section with ordinary matter. If there are enough of these MPBH, they could constitute the bulk of the Dark Matter today. Such PBH could be responsible for the observed fluctuations in the CIB and X-ray backgrounds. MPBH could be directly detected by the gravitational waves emitted when they merge to form more massive black holes, as recently reported by LIGO. Their continuous merging since recombination could have generated a stochastic background of gravitational waves that could eventually be detected by LISA and PTA. MPBH may actually be responsible for the unidentified point sources seen by Fermi, Magic and Chandra. Furthermore, the ejection of stars from shallow potential wells like those of Dwarf Spheroidals (DSph), via the gravitational slingshot effect, could be due to MPBH, thus alleviating the substructure and too-big-to-fail problems of standard collisionless CDM. Their mass distribution peaks at a few tens of M⊙ today, and could therefore be detected also with long-duration microlensing events, as well as by the anomalous motion of stars in the field of GAIA. Their presence as CDM in the Universe could be seen in the time-dilation of strong-lensing images of quasars. The hierarchical large scale structure behaviour of MPBH does not differ from that of ordinary CDM.
Subfields: Astronomy and Astrophysics, Instrumentation, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/005402756a04f89e0d7307f8b16de809dc660a0e
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Citations in the corpus
- Single field double inflation and primordial black holes (2017, result): “eds for supermassive black holes and therefore for galaxy formation [26,44{47]. The properties of PBHs could also explain other astrophysical and cosmological puzzles (for a review and references see [48]). All the current measurements of the cosmic microwave background (CMB) perturbations [49,50] a”
- Reconstructing the spectral shape of a stochastic gravitational wave background with LISA (2019, unknown): “[119–121] for general reviews, and refs.”
- Primordial black holes as generators of cosmic structures (2018, methodology): “This point has also been emphasized by Clesse & Garcia-Bellido (2017b).”
- Gravitational wave signatures of inflationary models from Primordial Black Hole dark matter (2017, background): “To conclude, PBH offer an exciting new possibility for dark matter, with several experimental consequences [1].”
- The exponential tail of inflationary fluctuations: consequences for primordial black holes (2019, background): “[30, 31] for reviews), since PBHs leave several imprints throughout the history of the universe: by injecting energy into their surrounding environment, by providing a source of gravitational lensing, by sourcing various dynamical effects, and by emitting gravitational waves [32–34].”
- A Brief Review on Primordial Black Holes as Dark Matter (2021, background): “…being of primordial nature, although there is no strong preference over stellar BHs (Sasaki et al., 2016; Ali-Haïmoud et al., 2017; Clesse and García-Bellido, 2017; Clesse and García-Bellido, 2018; Garcia-Bellido et al., 2020; De Luca et al., 2020b; De Luca et al., 2021; Wong et al., 2021).”
- Primordial black holes as dark matter candidates (2021, background): “This goes against a stellar binary origin [225] but is a prediction of the PBH scenario [226], although accretion could modify this conclusion [227].”