Primordial black hole formation for an anisotropic perfect fluid: Initial conditions and estimation of the threshold

Abstract

This work investigates the formation of primordial black holes within a radiation fluid with an anisotropic pressure. We focus our attention on the initial conditions describing cosmological perturbations in the super horizon regime, using a covariant form of the equation of state in terms of pressure and energy density gradients. The effect of the anisotropy is to modify the initial shape of the cosmological perturbations with respect to the isotropic case. Using the dependence of the threshold ${\delta }_{\mathrm{c}}$ for primordial black holes with respect to the shape of cosmological perturbations, we estimate here how the threshold is varying with respect to the amplitude of the anisotropy. If this variation is large enough it could lead to a significant variation of the abundance of PBHs.

arXiv commentPublished in Physical Review D, Version 4: 16 pages, 7 figures, minor changes in Sec. III

References in corpus (52)

• GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• Did LIGO detect dark matter?
• Constraints on Primordial Black Holes
• Primordial Black Hole Scenario for the Gravitational-Wave Event GW150914
• A new approach to the evolution of cosmological perturbations on large scales
• Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
• A general proof of the conservation of the curvature perturbation
• The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
• GW190412: Observation of a Binary-Black-Hole Coalescence with Asymmetric Masses
• Primordial Black Holes as a dark matter candidate
• The clustering of massive Primordial Black Holes as Dark Matter: measuring their mass distribution with Advanced LIGO
• Anisotropic Stars in General Relativity
• Gravitational Energy in Spherical Symmetry
• The merger rate of primordial-black-hole binaries
• Threshold of primordial black hole formation
• Black hole formation in the Friedmann universe: Formulation and computation in numerical relativity
• Computations of primordial black hole formation
• Spherically symmetric dissipative anisotropic fluids: A general study
• Formation and Evolution of Primordial Black Hole Binaries in the Early Universe
• NANOGrav Hints to Primordial Black Holes as Dark Matter
• Threshold for primordial black holes: Dependence on the shape of the cosmological perturbations
• Primordial black hole formation in the early universe: critical behaviour and self-similarity
• Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse
• Did NANOGrav see a signal from primordial black hole formation?
• A universal threshold for primordial black hole formation
• The Threshold for Primordial Black Hole Formation: a Simple Analytic Prescription
• Lower bound on the primordial black hole merger rate
• Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves
• Non-radial oscillations of anisotropic neutron stars in the Cowling approximation
• Primordial Black Hole Formation during First-Order Phase Transitions
• Primordial Black Holes Confront LIGO/Virgo data: Current situation
• Anisotropic stars as ultracompact objects in General Relativity
• Bayesian analysis of LIGO-Virgo mergers: Primordial vs. astrophysical black hole populations
• Curvature profiles as initial conditions for primordial black hole formation
• The GW190521 Mass Gap Event and the Primordial Black Hole Scenario
• Constraining the primordial black hole scenario with Bayesian inference and machine learning: the GWTC-2 gravitational wave catalog
• The Clustering Evolution of Primordial Black Holes
• Evidence for primordial black hole dark matter from LIGO/Virgo merger rates
• Anisotropic Stars: Exact Solutions and Stability
• Primordial Black Hole Dark Matter and the LIGO/Virgo observations
• Constraints on Primordial Black Holes: the Importance of Accretion
• NANOGrav results and LIGO-Virgo primordial black holes in axion-like curvaton model
• The tidal deformability of an anisotropic compact star: Implications of GW170817
• Primordial black hole merger rates: distributions for multiple LIGO observables
• Testing Stochastic Gravitational Wave Signals from Primordial Black Holes with Optical Telescopes
• Small-scale structure of primordial black hole dark matter and its implications for accretion
• On Ellipsoidal Collapse and Primordial Black-Hole Formation
• GW190425, GW190521 and GW190814: Three candidate mergers of primordial black holes from the QCD epoch
• Spherical and nonspherical models of primordial black hole formation: exact solutions
• Gravitational collapse for a radiating anisotropic fluid

Cited by in corpus (15)

• Inflation and Primordial Black Holes
• Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves
• PBH formation from spherically symmetric hydrodynamical perturbations: a review
• Primordial Black Holes
• Primordial black holes in loop quantum cosmology: The effect on the threshold
• Primordial black holes as dark matter: Interferometric tests of phase transition origin
• Large fluctuations and Primordial Black Holes
• Constraining $F(R)$ bouncing cosmologies with primordial black holes
• Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era
• Exploring Critical Overdensity Thresholds in Inflationary Models of Primordial Black Holes Formation
• Primordial Black Hole Formation in Non-Standard Post-Inflationary Epochs
• Cosmology using numerical relativity
• Primordial Black Holes from Effective Field Theory of Stochastic Single Field Inflation at NNNLO
• Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
• Primordial blackhole formation: Exploring chaotic potential with a sharp step via the GLMS perspective