2024/06/10 by James Barbieri, Barbieri, James, George Chapline +1 · 1 citation
Engineering · Physics and Astronomy · #Astrophysical Phenomena and Observations #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2406.06827
openalex publication_date 2024/06/10 · openalex created_date 2024/06/13 · openalex updated_date 2026/07/28
In this note we outline how a modest violation in the conservation of mass during the merger of two PBHs affects the PBH mass spectrum that we previously obtained using a Boltzmann equation model for the evolution of the mass spectrum with no mass loss. We find that if the initial cosmological redshift is on the order 1012, then the fraction of primordial holes with masses greater than 103 solar masses appears be close to what is required to provide the seeds for galaxies. In addition we note that as a result of rapid collisions and strong coupling to electromagnetic radiation for temperatures > GeV (Chapline 2018), there will be an effective low mass cutoff in the mass spectrum for PBH masses less than a certain PBH mass less than than 0.1M\odot. We also point out that this cutoff in the mass spectrum below ∼ 0.1 M_\odot can be confirmed by combining future microlensing observations from the Roman Space Telescope and the Vera C. Rubin Observatory with astrometric observations.