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Core formation from self-heating dark matter

23 Jul 2018, 17:30
20m
Room C

Room C

Speaker

Xiaoyong Chu (Institute of High Energy Physics, Vienna (A))

Description

This talk introduces a novel solution to astrophysical small-scale problems, (i.e. core/cusp and too-big-to-fail) by invoking a certain class of dark matter self-annihilating processes. Such processes lead to the formation of dark matter cores at late times by considerably reducing the inner mass density of dwarf-sized halos. An important aspect of this new solution is that the semi-annihilation effects are much more prominent in dwarf-sized halos than in the more massive halos that host galaxies and clusters, even if the corresponding cross sections are the same.

Parallel Session Dark Matter, Astroparticle Physics

Primary author

Xiaoyong Chu (Institute of High Energy Physics, Vienna (A))

Co-author

Presentation materials