2 papers
astro-ph.CO2026
Interpretation of Nanohertz Gravitational Waves via Cosmic Strings in Post-BBN Matter and Kination Domination
Raymond T. Co, Siu Cheung Lam, Taegyu Lee
Recent pulsar timing array (PTA) observations have reported evidence for a common low frequency signal consistent with a stochastic gravitational wave background. In this work, we…
astro-ph.CO2025
Reviving sub-keV warm dark matter: a UVLF-based analysis
Raymond T. Co, Siu Cheung Lam, Sai Chaitanya Tadepalli +1
Thermal warm dark matter (WDM) particles with are ruled out at more than by multiple observational probes, owing to the strong suppression of…