Galaxy Models with Tangentially Anisotropic Velocity Distributions

Details Galaxy Models with Tangentially Anisotropic Velocity Distributions Galaxy Models with Tangentially Anisotropic Velocity Distributions

2005-01-06

arxiv.org/abs/astro-ph/0501092v3

Astron.J. 131 (2006) 782-789

Astronomy and Astrophysics

Astrophysics

to appear in AJ, extended appendix, typo corrected from the 2nd version (completely rewritten from the 1st version, see also a

Scientific paper

10.1086/499305

This paper provides two families of flexible and simple galaxy models. Representatives of many of the families possess the important cosmological cusps, with the density behaving like 1/r or 1/r^1.33 or 1/r^1.5 at small radii. The density falls off between 1/r^3 and 1/r^5 at large radii. We provide analytic and anisotropic distribution functions for all the models. Unlike many existing methods, our algorithm can yield tangentially anisotropic velocity dispersions in the outer parts, and so is useful for modeling populations of satellite galaxies and substructure in host galaxy halos. As an application, we demonstrate the degeneracy between mass and anisotropy for the satellite galaxy population of the Milky Way. This can introduce a factor of ~3 uncertainty in the mass of the Milky Way as inferred from the kinematics of the satellite population.

Affiliated with

Also associated with

No associations

Rating

Galaxy Models with Tangentially Anisotropic Velocity Distributions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Galaxy Models with Tangentially Anisotropic Velocity Distributions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galaxy Models with Tangentially Anisotropic Velocity Distributions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-292326