Speaker
Dr
Kensuke Akita
(Institute for Basic Science, Center for Theoretical Physics of the Universe)
Description
The elastic scattering between dark matter (DM) and radiation can potentially explain small-scale observations that the cold dark matter faces as a challenge, as damping density fluctuations via dark acoustic oscillations in the early universe erases small-scale structure. We study a semi-analytical subhalo model for interacting dark matter with radiation, based on the extended Press-Schechter formalism and subhalos' tidal evolution prescription. We also test the elastic scattering between DM and neutrinos using observations of Milky-Way satellites from the Dark Energy Survey and PanSTARRS1. This talk is based on arXiv: 2305.01913.
| Submitted on behalf of a Collaboration? | No |
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Author
Dr
Kensuke Akita
(Institute for Basic Science, Center for Theoretical Physics of the Universe)
Co-author
Shin'ichiro Ando
(University of Amsterdam)
