8 papers
Dark Matter and Baryon Asymmetry from Monopole-Axion Interactions
Raymond T. Co, Keisuke Harigaya, Isaac R. Wang +1
We introduce a novel mechanism where the kinetic energy of a rotating axion can be dissipated by the interactions with dark magnetic monopoles. This mechanism leads to a framework…
Warm and Fuzzy Dark Matter: Free Streaming of Wave Dark Matter
Rayne Liu, Wayne Hu, Huangyu Xiao
Wave or fuzzy dark matter that is produced with relativistic wavenumbers exhibits free streaming effects analogous to warm or hot particle dark matter with relativistic momenta. Ax…
Interference with Gravitational Instability: Hot and Fuzzy Dark Matter
Rayne Liu, Wayne Hu, Huangyu Xiao
Wave or fuzzy dark matter produced with high momenta behaves in many ways like hot particle dark matter while also possessing seemingly different phenomenology due to wave interfer…
Radio Killed the Axion Star: Constraining Axion Properties with Radio Telescopes
Patrick J. Fox, Neal Weiner, Huangyu Xiao
Axion dark matter or any ultralight bosonic dark matter can go through Bose-Einstein condensation due to the large phase density, leading to the formation of axion stars or soliton…
Probing Fundamental Constant Oscillation in the Galactic Center with S-Star Spectroscopy
Zhaoyu Bai, Vitor Cardoso, Yifan Chen +5
Astrophysical spectroscopy provides a powerful probe of spacetime variations of fundamental constants, as atomic and ionic emission and absorption lines depend sensitively on the f…
Universal lower bound on the axion decay constant from free streaming effects
Keisuke Harigaya, Wayne Hu, Rayne Liu +1
We show that enhancement of the axion relic abundance compared to the standard misalignment contribution generically leads to the production of nonzero momentum axion modes, result…