Detecting the stochastic gravitational wave background from primordial black holes in slow-reheating scenarios
Volume
2024
Publisher
DOI
10.1088/1475-7516/2024/12/011
Journal
Journal of Cosmology and Astroparticle Physics
Issue
Metadata
Show full item recordAbstract
After primordial inflation, the universe may have experienced a prolonged reheating epoch, potentially leading to a phase of matter domination supported by the oscillating inflaton field. During such an epoch, perturbations in the inflaton virialize upon reentering the cosmological horizon, forming inflaton structures. If the primordial overdensities are sufficiently large, these structures collapse to form primordial black holes (PBHs). To occur at a significant rate, this process requires an enhanced primordial power spectrum (PPS) at small scales. The enhancement of the PPS, as well as the formation and tidal interaction of the primordial structures, will in turn source a stochastic gravitational wave background (SGWB) that could be detected by current and/or future gravitational wave detectors. In this paper, we study the SGWB arising from these different sources during slow-reheating, focusing on a PPS that satisfies the requirements necessary for the formation of PBHs with a mass of MPBH ≃ 1021 and that constitute the entirety of dark matter in the universe.
Authors
Padilla, LE; Hidalgo, JC; Malik, KA; Mulryne, DCollections
- Physics and Astronomy [1510]