2020
DOI: 10.48550/arxiv.2010.06470
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Power spectrum of density fluctuations, halo abundances and clustering with primordial black holes

Nelson Padilla,
Juan Magana,
Joaquin Sureda
et al.

Abstract: We calculate the effect of dark matter (DM) being encapsulated in primordial black holes (PBHs) on the power spectrum of density fluctuations P (k); we also look at its effect on the abundance of haloes and their clustering. We adopt a growth of Poisson fluctuations that starts only after the moment of matter and radiation equality and study both monochromatic and extended Press-Schechter distributions. We present updated monochromatic black hole mass constraints by demanding < 10% deviations from the Λ cold d… Show more

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Cited by 3 publications
(3 citation statements)
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“…For more realistic extended mass functions, the abundance, size and evolution of DM halos, partially or entirely made of PBHs, is impacted by several effects, see e.g. [59][60][61][62][63][64][65][66][67][68][69]. Let us mention a Poissonian noise from the discrete nature of PBHs, a seeding effect from heavy PBHs, the enhancement of the primordial power spectrum at the origin of PBH formation, the dynamical heating and evaporation of clusters, etc.…”
Section: Merging Rate From Pbh Clustersmentioning
confidence: 99%
“…For more realistic extended mass functions, the abundance, size and evolution of DM halos, partially or entirely made of PBHs, is impacted by several effects, see e.g. [59][60][61][62][63][64][65][66][67][68][69]. Let us mention a Poissonian noise from the discrete nature of PBHs, a seeding effect from heavy PBHs, the enhancement of the primordial power spectrum at the origin of PBH formation, the dynamical heating and evaporation of clusters, etc.…”
Section: Merging Rate From Pbh Clustersmentioning
confidence: 99%
“…Finally, as dark matter is (posited to be) made of discrete massive entities (i.e., primordial black holes), there is a further effect that has to be accounted for in the power spectrum. This last effect corresponds to the Poisson sampling noise, which is currently being studied (Padilla et al 2020). All in all, the matter power spectrum is given by…”
Section: The Matter Power Spectrummentioning
confidence: 99%
“…Recently, LIGO detections of gravitational waves have introduced another potential source of information about the early universe, and have lead to renewed interest in the possibility of primordial black holes [5] [6] [7] [8]. See [9] for an analysis based on quantum gravity considerations, and [10] for an analysis based on ΛCDM phenomenology, plus compilations of references relevant to these different perspectives. If black holes existed in the early universe it is possible that the effects could be observed in the CMBR.…”
Section: Introductionmentioning
confidence: 99%