Primordial Origin of Supermassive Black Holes from Axion Bubbles
Cosmology and Nongalactic Astrophysics
2023-10-23 v1 High Energy Physics - Phenomenology
Abstract
We study a modification of the primordial black hole (PBH) formation model from axion bubbles. We assume that the Peccei-Quinn scalar rolls down in the radial direction from a large field value to the potential minimum during inflation, which suppresses the axion fluctuations and weakens the clustering of PBHs on large scales. We find that the modified model can produce a sufficient number of PBHs that seed the supermassive black holes while avoiding the observational constraints from isocurvature perturbations and angular correlation of the high-redshift quasars.
Keywords
Cite
@article{arxiv.2310.13333,
title = {Primordial Origin of Supermassive Black Holes from Axion Bubbles},
author = {Kentaro Kasai and Masahiro Kawasaki and Naoya Kitajima and Kai Murai and Shunsuke Neda and Fuminobu Takahashi},
journal= {arXiv preprint arXiv:2310.13333},
year = {2023}
}
Comments
17 pages, 8 figures