Constraining inflationary magnetogenesis and reheating via GWs in light of PTA data
Cosmology and Nongalactic Astrophysics
2025-05-05 v2 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
By leveraging the limits on primordial magnetic fields (PMFs), their contributions to secondary gravitational waves (GWs), and the recent observations by the pulsar timing arrays (PTAs), we arrive at constraints on the epoch of reheating. We find that the combined spectral energy density of primary and secondary (generated by the PMFs) GWs can be described as a broken power law with different indices. We show that PMFs with blue spectra and appropriate reheating scenarios can successfully explain the PTA observations without invoking any new physics.
Keywords
Cite
@article{arxiv.2401.01864,
title = {Constraining inflationary magnetogenesis and reheating via GWs in light of PTA data},
author = {Subhasis Maiti and Debaprasad Maity and L. Sriramkumar},
journal= {arXiv preprint arXiv:2401.01864},
year = {2025}
}
Comments
Significant changes to the analysis and results; new figures added; conclusions updated to reflect revised findings