Probing dark matter self-interaction with ultrafaint dwarf galaxies
作者： Masahiro Ibe , Kohei Hayashi , Satoshi Shirai , Shin Kobayashi , Yuhei Nakayama
DOI: 10.1103/PHYSREVD.103.023017
关键词:
摘要: Self-interacting dark matter (SIDM) has gathered growing attention as a solution to the small-scale problems of collisionless cold (CDM). We investigate SIDM using stellar kinematics 23 ultra-faint dwarf (UFD) galaxies with phenomenological halo model. The UFDs are DM-dominated and have less active star formation history. Therefore, they ideal objects test SIDM, their profiles hardly affected by baryonic processes. found no favor nonzero self-interaction some provide stringent constraints. Our result challenges simple modeling which urges further investigation subhalo dynamical evolution SIDM.
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