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Thermal Evolution of Neutron Stars as a Probe of Physics beyond the Standard Model
Keisuke Yanagi
Thermal evolution of neutron stars (NSs) is studied as a probe of physics beyond the standard model. We first review the standard cooling theory of NSs in detail, with an emphasis…
Constraining FIMP from the structure formation of the Universe: analytic mapping from
Ayuki Kamada, Keisuke Yanagi
A feebly interacting massive particle (FIMP), contrasting with a weakly interacting massive particle (WIMP), is an intriguing dark matter (DM) candidate. Light (keV-scale) FIMP DM…
Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars
Koichi Hamaguchi, Natsumi Nagata, Keisuke Yanagi
Dark matter (DM) particles in the Universe accumulate in neutron stars (NSs) through their interactions with ordinary matter. It has been known that their annihilation inside the N…
Limit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A
Koichi Hamaguchi, Natsumi Nagata, Keisuke Yanagi +1
The observed rapid cooling of the neutron star (NS) located at the center of the supernova remnant Cassiopeia A (Cas A) can be explained in the minimal NS cooling scenario. This co…
Self-interacting dark matter and muon in a gauged U model
Ayuki Kamada, Kunio Kaneta, Keisuke Yanagi +1
We construct a self-interacting dark matter model that could simultaneously explain the observed muon anomalous magnetic moment. It is based on a gauged U extensio…
Colder Freeze-in Axinos Decaying into Photons
Kyu Jung Bae, Ayuki Kamada, Seng Pei Liew +1
We point out that 7 keV axino dark matter (DM) in the R-parity violating (RPV) supersymmetric (SUSY) Dine-Fischler-Srednicki-Zhitnitsky model can simultaneously reproduce the 3.5ke…