CMB spectral distortions from black holes formed by vacuum bubbles

Heling Deng, Alexander Vilenkin, Masaki Yamada

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Vacuum bubbles may nucleate and expand during the cosmic inflation. When inflation ends, the bubbles run into the ambient plasma, producing strong shocks followed by underdensity waves, which propagate outwards. The bubbles themselves eventually form black holes with a wide distribution of masses. It has been recently suggested that such black holes may account for LIGO observations and may provide seeds for supermassive black holes observed at galactic centers. They may also provide a significant part or even the whole of the dark matter. We estimate the spectral μ-distortion of the CMB induced by expanding shocks and underdensities. The predicted distortions averaged over the sky are well below the current bounds, but localized peaks due to the largest black holes impose constraints on the model parameters.

Original languageEnglish
Article number059
JournalJournal of Cosmology and Astroparticle Physics
Volume2018
Issue number7
DOIs
Publication statusPublished - 2018 Jul 26
Externally publishedYes

Keywords

  • CMBR theory
  • Primordial black holes
  • cosmological phase transitions
  • massive black holes

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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