22-29 July 2015
Europe/Vienna timezone

Thermal transport of the solar captured dark matter and its impact on the indirect dark matter search

Jul 24, 2015, 12:15 PM
15m
HS33

HS33

talk Astroparticle Physics, Cosmology, Gravitation Astroparticle Physics, Cosmology, Gravitation

Speaker

Mr Yen-Hsun Lin (Institute of Physics, National Chiao Tung University, Taiwan)

Description

We study the thermal transport occurring in the system of solar captured dark matter (DM) and explore its impact on the DM indirect search signal. We particularly focus on the scenario of self-interacting DM (SIDM). The energy flows in and out of the system include the gravitational capture via DM-nucleon and DM-DM scatterings, the energy dissipation via DM annihilation, and the heat exchange between DM and solar nucleus. We examine the DM temperature evolution and demonstrate that the DM temperature can be higher than the core temperature of the Sun if the DM-nucleon cross section is sufficiently small such that the energy flow due to DM self-interaction becomes relatively important. We argue that the correct DM temperature should be used for accurately predicting the DM annihilation rate and consequently the signal for the indirect detection.

Primary authors

Dr Chian-Shu Chen (Physics Division, National Center for Theoretical Sciences, Taiwan) Prof. Guey-Lin Lin (Institute of Physics, National Chiao Tung University, Taiwan) Mr Yen-Hsun Lin (Institute of Physics, National Chiao Tung University, Taiwan)

Presentation materials