3 papers
astro-ph.CO2026
Isocurvature Induced Gravitational Waves at Pulsar Timing Arrays
Yi-Fu Cai, Peizhi Du, Jiahang Zhong
Gravitational waves (GWs) are powerful probes of new physics in the early Universe. In particular, GWs induced by primordial isocurvature perturbations encode information of novel…
astro-ph.CO2025
Cosmological Constraints on Secluded Dark Radiation
Jae Hyeok Chang, Peizhi Du, Subhajit Ghosh +1
Dark radiation (DR) is ubiquitous in physics beyond the Standard Model (SM), and its interactions with the SM and dark matter (DM) lead to a variety of interesting effects on cosmo…
astro-ph.CO2025
General Constraints on Isocurvature from the CMB and Ly- Forest
Matthew R. Buckley, Peizhi Du, Nicolas Fernandez +1
Current cosmological data are well-described by the Lambda-Cold Dark Matter (CDM) model, which assumes adiabatic initial conditions for the primordial density perturbations. Th…