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High Energy


Joint Theory Seminar: Yiming Zhong

Description <p>Joint Theory Seminar Speaker:&nbsp;Yiming Zhong<br />mail:&nbsp;<br />Title:&nbsp;Cooling self-interacting dark matter halos<br />Host: &nbsp;John Terning<br />Room: 432<br />Abstract:&nbsp;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 &nbsp;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.</p>
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

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