Constraining primordial black holes as a fraction of dark matter through accretion disk luminosity

Abstract

In this paper, we consider the hypothesis that fractions of dark matter could be constituted by primordial black holes (PBHs). To test this possibility, we work out the observational properties of a static black hole embedded in the dark matter envelope made of a PBH source. The corresponding modifications of geometry due to such a physical system are investigated, with a particular focus on the accretion disk luminosity in spiral galaxies. The impact of the PBH presence is analyzed through modification of the disk luminosity and kinematic quantities. Thus, we discuss possible constraints on the PBH abundance in view of the most recent theoretical bounds. The results of our study indicate that suitable PBH masses are $M_{\text{PBH}}\in [10^6,10^{12}]M_{\odot }$ for PBH fractions $f_{\text{PBH}}\in [10^{-3},1]$. In particular, a comparison with the predictions of the exponential sphere density profile for dark matter suggests that the best-matching configuration is achieved for $f_{\text{PBH}}=1$ and $M_{\text{PBH}}=10^6{M}_{\odot }$. Consequences with respect to the current knowledge on primordial black hole physics are discussed.

10 pages, 6 figures, Accepted for publication in Phys. Rev. D

References in corpus (17)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Primordial Black Holes as Dark Matter: Recent Developments
• Extended Gravity Cosmography
• Dark matter and the early Universe: a review
• Thin accretion disks in stationary axisymmetric wormhole spacetimes
• Testing the space-time geometry around black hole candidates with the analysis of the broad K$\alpha$ iron line
• Can accretion disk properties distinguish gravastars from black holes?
• Primordial Black Hole Evaporation and Dark Matter Production: I. Solely Hawking radiation
• The Clustering Evolution of Primordial Black Holes
• Do Evaporating Black Holes Form Photospheres?
• Accretion disk luminosity for black holes surrounded by dark matter
• Note on the effect of a massive accretion disk in the measurements of black hole spins
• Forecasting constraints on deviations from general relativity in $f(Q)$ gravity with standard sirens
• Indirect Probes of Dark Matter and Globular Cluster Properties From Dark Matter Annihilation within the Coolest White Dwarfs
• Gravitational waves from binary black holes as probes of the structure formation history

Cited by in corpus (5)

• Observational Evidence for Primordial Black Holes: A Positivist Perspective
• Primordial black holes from null energy condition violation during inflation
• Can the NANOGrav observations constrain the geometry of the universe?
• Epicyclic oscillations and accretion disk around a special Buchdahl-inspired spacetime
• Primordial black holes and the velocity acoustic oscillations features in 21 cm signals from the cosmic Dark Ages