Derivation of the anisotropy profile, constraints on the local velocity dispersion, and implications for direct detection
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- Physics Department and The McDonnell Center for the Space Sciences, Washington University, St. Louis, MO, 63130 (United States)
We study the implications of a pseudo-phase-space density power-law for the anisotropy profile of a Milky Way-like dark matter halo. Requiring that the anisotropy parameter does not take non-physical values within the virial radius places a maximum value on the local radial velocity dispersion. For a plausible range of halo parameters, it is possible to take a local total velocity dispersion of up to about 300 km/s. Making this choice uniquely specifies the anisotropy and dispersion profiles. We introduce a way to model the local velocity distribution that incorporates this anisotropy and study the impact on direct detection.
- OSTI ID:
- 22369761
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 02; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stellar velocity dispersion and anisotropy of the Milky Way inner halo
On the shoulders of giants: properties of the stellar halo and the Milky Way mass distribution
VELOCITY DISPERSION PROFILE OF THE MILKY WAY HALO
Journal Article
·
Tue Nov 10 00:00:00 EST 2015
· Astrophysical Journal
·
OSTI ID:22369761
On the shoulders of giants: properties of the stellar halo and the Milky Way mass distribution
Journal Article
·
Fri Oct 10 00:00:00 EDT 2014
· Astrophysical Journal
·
OSTI ID:22369761
+1 more
VELOCITY DISPERSION PROFILE OF THE MILKY WAY HALO
Journal Article
·
Fri Jan 15 00:00:00 EST 2010
· Astronomical Journal (New York, N.Y. Online)
·
OSTI ID:22369761
+1 more