http://arxiv.org/abs/1711.03103
If a component of the dark matter has dissipative interactions, it could collapse to form a thin dark disk in our Galaxy that is coplanar with the baryonic disk. It has been suggested that dark disks could explain a variety of observed phenomena, including periodic comet impacts. Using the first data release from the Gaia space observatory, we search for a dark disk via its effect on stellar kinematics in the Milky Way. Our new limits disfavor the presence of a thin dark matter disk, and we present updated measurements on the total matter density in the solar neighborhood.
K. Schutz, T. Lin, B. Safdi, et. al.
Fri, 10 Nov 17
17/55
Comments: 7+19 pages, 2+18 figures