If a component of the dark matter has dissipative interactions, it could collapse to form a thin dark disk in our Galaxy coincident with the baryonic disk. It has been suggested that dark disks could explain a variety of observed phenomena, including mass extinction events due to periodic comet impacts. Using the first data release from the Gaia space observatory, I will present the results of a search for a dark disk via its effect on stellar kinematics in the Milky Way. I will discuss our strong new limits that disfavor the presence of a thin dark matter disk and present updated measurements on the total matter density in the solar neighborhood.
Pheno & Vino Seminar
Excluding a Thin Dark Matter Disk in the Milky Way with Gaia DR1
University of California, Berkeley
Natural Sciences, Natural Sciences
Date & Time
November 14, 2017 | 4:00 – 5:00pm
Jadwin Hall, Room 303