two gamma event

High Energy


Joint Theory Seminar: Yiming Zhong


Joint Theory Seminar
Speaker: Yiming Zhong

Title: Cooling self-interacting dark matter halos

Host:  John Terning

Room: 432

Abstract: Dark sector models naturally introduce elastic and dissipative self-interactions of dark matter. The heat exchange induced by the elastic scattering permits the gravothermal evolution of the halo. Through the evolution, the inner halo  firstly develops a core but ultimately becomes cuspy. Based on a semi-analytic fluid model calibrated with N-body simulations, we find that a mild dissipative scattering can significantly accelerate this evolution. Using near-field dwarf galaxies that exhibit a core-like dark matter density profile, we derive novel constraints on the strength of dissipative interactions and the energy loss per collision.

Date Mon, October 8, 2018
Time 1:30pm-3:00pm PDT
Duration 1 hour 30 minutes
Access Public
Created by High-Energy Seminars
Updated Tue, September 11, 2018 1:24pm PDT
Send Reminder Yes  -  3 days 0 hour 0 minutes before start

Recent changes RSS feed Creative Commons License Powered by PHP