187 citations · 709 across the 23 of their papers we have counts for
3 papers · 1 filter
Probing New Physics with High-Redshift Quasars: Axions and Non-standard Cosmology
Chen Sun, Manuel A. Buen-Abad, JiJi Fan
The Hubble diagram of quasars, as candidates to ``standardizable" candles, has been used to measure the expansion history of the Universe at late times, up to very high redshifts (…
Stepped Partially Acoustic Dark Matter: Likelihood Analysis and Cosmological Tensions
Manuel A. Buen-Abad, Zackaria Chacko, Can Kilic +2
We generalize the recently proposed Stepped Partially Acoustic Dark Matter (SPartAcous) model by including additional massless degrees of freedom in the dark radiation sector. We f…
Gravitational-wave signatures from reheating
Manuel A. Buen-Abad, Jae Hyeok Chang, Anson Hook
We initiate a study of the gravitational-wave signatures of a phase transition that occurs as the Universe's temperature increases during reheating. The gravitational-wave signatur…