Lawrence Berkeley National Laboratory
Constraining a Thin Dark Matter Disk with Gaia.
- Author(s): Schutz, K
- Lin, T
- Safdi, BR
- Wu, C-L
- et al.
Published Web Locationhttps://doi.org/10.1103/physrevlett.121.081101
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.