Constraining a Thin Dark Matter Disk with Gaia.

@article{Schutz2018ConstrainingAT,
  title={Constraining a Thin Dark Matter Disk with Gaia.},
  author={Katelin Schutz and Tongyan Lin and Benjamin R. Safdi and Chih-Liang Wu},
  journal={Physical review letters},
  year={2018},
  volume={121 8},
  pages={
          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… 

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References

SHOWING 1-10 OF 175 REFERENCES
Dark-disk universe.
TLDR
It is argued that a subdominant fraction of dark matter could constitute a fraction of all matter roughly as large as the fraction in baryons, and that it could be detected through its gravitational effects on the motion of stars in galaxies, for example.
Massive black holes from dissipative dark matter
We show that a subdominant component of dissipative dark matter resembling the Standard Model can form many intermediate-mass black hole seeds during the first structure formation epoch. We also
INTERSTELLAR GAS AND A DARK DISK
We introduce a potentially powerful method for constraining or discovering a thin dark matter disk in the Milky Way. The method relies on the relationship between the midplane densities and scale
Composite strongly interacting dark matter
It has been suggested that cold dark matter (CDM) has difficulties in explaining tentative evidence for noncuspy halo profiles in small galaxies, and the low velocity dispersions observed in the
Exothermic double-disk dark matter
If a subdominant component of dark matter (DM) interacts via long-range dark force carriers it may cool and collapse to form complex structures within the Milky Way galaxy, such as a rotating dark
On the interpretation of dark matter self-interactions in Abell 3827
Self-interactions of dark matter particles can potentially lead to an observable separation between the dark matter halo and the stars of a galaxy moving through a region of large dark matter
UPDATED KINEMATIC CONSTRAINTS ON A DARK DISK
We update the method of the Holmberg & Flynn study, including an updated model of the Milky Way’s interstellar gas, radial velocities, an updated reddening map, and a careful statistical analysis, to
A new determination of the local dark matter density from the kinematics of K dwarfs
We apply a new method to determine the local disc matter and dark halo matter density to kinematic and position data for ˜2000 K dwarf stars taken from the literature. Our method assumes only that
Limits on the local dark matter density
TLDR
A new method for recovering ρdm is introduced that uses moments of the Jeans equations, combined with a Markov chain Monte Carlo technique, to marginalize over the unknown parameters and shows that it can recover the correct local dark matter density even in the face of disc inhomogeneities, non-isothermal tracers and a non-separable distribution function.
...
...