Speaker
Lina Necib
(MIT)
Description
In this talk, I will show that metal poor halo stars have similar kinematics as dark matter in the solar neighborhood, using the hydrodynamic zoom-in simulation Eris of the Milky Way. Within this expectation, I extract the first empirically-determined dark matter velocity distribution using the velocity dispersions of the halo stars as measured by the Sloan Digital Sky Survey, and show that using this newly-found velocity distribution, the direct detection limits on dark matter scattering off nuclei are loosened by almost an order of magnitude at low dark matter masses.
Primary author
Lina Necib
(MIT)
Co-authors
Mariangela Lisanti
(Stanford University)
Prof.
Piero Madau
(UC Santa Cruz)
Jonah Herzog-Arbeitman
(Princeton University )
