3 papers
hep-ph2026
No Evidence for Superradiant Axions in LIGO-Virgo-KAGRA GWTC-5 Binary Black Hole Spins
Orion Ning, Benjamin R. Safdi, Catherine Welch
The quantum chromodynamics (QCD) axion and axion-like particles may form bound clouds around spinning black holes (BHs) when their Compton wavelength is comparable to the BH gravit…
astro-ph.HE2026
Neutrino opacities in magnetic fields for binary neutron star merger simulations
Mia Kumamoto, Catherine Welch
Neutrino interactions play a central role in transport and flavor evolution in the ejecta of binary neutron star mergers. Simulations suggest that neutron star mergers may produce…
nucl-th2025
Effects of Landau quantization on neutrino emission and absorption
Mia Kumamoto, Catherine Welch
Some neutron stars known as magnetars possess very strong magnetic fields, with surface fields as large as and internal fields that are possibly stronger. Recent o…