Spins of primordial black holes formed in the radiation-dominated phase of the universe: first-order effect

Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri +2

The standard deviation of the initial values of the nondimensional Kerr parameter $a_{\ast }$ of primordial black holes (PBHs) formed in the radiation-dominated phase of the universe i…