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2018

Modeling evolution of dark matter substructure and annihilation boost

Hiroshima, Nagisa, Ando, Shin'ichiro, Ishiyama, Tomoaki

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We study evolution of dark matter substructures, especially how they lose the mass and change density profile after they fall in gravitational potential of larger host halos.

We develop an analytical prescription that models the subhalo mass evolution and calibrate it to results of N-body numerical simulations of various scales from very small (Earth size) to large (galaxies to clusters) halos.
We then combine the results with halo accretion histories, and calculate the subhalo mass function that is physically motivated down to Earth-mass scales.
Our results --- valid for arbitrary host masses and redshifts --- show reasonable agreement with those of numerical simulations at resolved scales.

Modeling evolution of dark matter substructure and annihilation boost · Around

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