Speaker
Maura E. Ramirez-Quezada
(Johannes-Gutenberg Universität Mainz)
Description
The scattering of dark matter from stellar constituents leads to gravitational capture, with important observational consequences. In particular, white dwarf heating occurs due to the energy transfer in the dark matter capture and thermalisation processes, and the subsequent annihilation of captured dark matter. Here I will discuss the capture of dark matter, our study investigates a model where dark matter interacts with white dwarf ion components via a light scalar mediator. We apply this technique to observations of old white dwarfs in the globular cluster Messier 4, which we assume to be located in a DM subhalo.
Author
Maura E. Ramirez-Quezada
(Johannes-Gutenberg Universität Mainz)