CMB bounds on disk-accreting massive primordial black holes

By V. Poulin, P. Serpico, F. Calore, S. Clesse, K. Kohri. 2017

224 citations recorded by the source corpus.

Stellar-mass primordial black holes (PBH) have been recently reconsidered as a dark matter (DM) candidate after the aLIGO discovery of several binary black hole (BH) mergers with masses of tens of ${M}_{\ensuremath{\bigodot}}$. Matter accretion on such massive objects leads to the emission of high-energy photons, capable of altering the ionization and thermal history of the universe. This, in turn, affects the statistical properties of the cosmic microwave background (CMB) anisotropies. Previous analyses have assumed spherical accretion. We argue that this approximation likely breaks down and that an accretion disk should form in the dark ages. Using the most up-to-date tools to compute the energy deposition in the medium, we derive constraints on the fraction of DM in PBH. Provided that disks form early on, even under conservative assumptions for accretion, these constraints exclude a monochromatic distribution of PBH with masses above $\ensuremath{\sim}2\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$ as the dominant form of DM. The bound on the median PBH mass gets more stringent if a broad, log-normal mass function is considered. A deepened understanding of nonlinear clustering properties and BH accretion disk physics would permit an improved treatment and possibly lead to more stringent constraints.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/1c0ce788feccebc9a12a571435611d71ec3e8b72

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Florian Kuhnel
2. B. Carr
3. K. Kohri
4. T. Terada
5. R. Cai
6. V. Vaskonen
7. J. Silk
8. H. Veermae

Citations in the corpus

• Two populations of LIGO-Virgo black holes (2020, methodology): “5 show the constraints from microlensing results from EROS [76], OGLE [77], and MACHO [78], lensing of type Ia supernovae (SNe) [79], survival of a stars in dwarf galaxies (Seg I and Eri II) [80, 81], distribution of wide binaries (WB) [82], Lyman-α forest data [83, 84] and limits on accretion (Plan”
• Primordial Black Holes as Dark Matter: Recent Developments (2020, background): “[204, 205] argue that the spherical accretion approximation probably breaks down, with an accretion disk forming instead, and this affects the statistical properties of the CMB anisotropies.”
• A Brief Review on Primordial Black Holes as Dark Matter (2021, background): “Some of the results outlined above are still valid if the dimensionless accretion rate λ is suppresed by roughly two orders of magnitude, after accounting for viscosity effects and matter outflows through jets (Poulin et al., 2017b).”
• Revisiting constraints on asteroid-mass primordial black holes as dark matter candidates (2019, background): “The CMB spectral distortions and anisotropies strongly constrain monochromatic masses of PBH due to the non-blackbody spectrum from the additional energy injection by accreting PBHs [44–47].”
• Femtolensing by dark matter revisited (2018, background): “(Stronger CMB limits are obtained if more aggressive assumptions on accretion by PBHs are adopted [61].”
• Generating PBHs and small-scale GWs in two-field models of inflation (2020, background): “The observational constraints represent those from extra-galactic radiation (EG bkg) [77], microlensing by the Subaru Hyper Suprime-Cam (HSC) [78], Kepler [79], EROS [80], survival of ultrafaint dwarf galaxies (UFD) [81] and the accretion on the CMB [82–85].”
• Solar-mass primordial black holes explain NANOGrav hint of gravitational waves (2020, background): “The dark shaded regions at the top are constraints from EROS-2 [88] and MACHO [89] (brown), caustic crossing [90] (purple), Advanced LIGO O2 (subsolar mass range) [91] (gray), Advanced LIGO non-detection of the stochastic GW background [92, 93] (cyan), and the E-mode polarization of the CMB due to t”
• Primordial black holes as dark matter candidates (2021, background): “[157, 158] argue that the spherical accretion approximation probably breaks down, with an accretion disk forming instead.”
• Primordial black holes as generators of cosmic structures (2018, background): “The CMB anisotropy constraints from the Planck satellite are even stronger if the PBHs form accretion discs (Poulin et al. 2017).”