Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter

Details Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367..507m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Feb. 1, 1991, p. 507-513.

Statistics

Computation

13

Anisotropy, Computational Astrophysics, Dark Matter, Jeans Theory, Neutrinos, Density Distribution, Equations Of State, Fermions

Scientific paper

Zero central density solutions of the spherically symmetric, anisotropic Jeans equation are shown to exist for a wide range of conditions when the transverse velocity dispersion exceeds the radial one. Explicit solutions are described for generalized polytropes with distribution functions like ordinary polytropes multiplied by a power of angular momentum, and for systems with constant phase-space density in velocity ellipsoids (only the first kind of solutions are time-independent). The constant phase-space density systems obey mass-radius relations of the type MR-cubed = constant, and so do the generalized polytropes regardless of the polytropic index n, provided that the maximum value of the phase-space density is fixed. This constraint follows naturally in collisionless systems. In most cases the anisotropic solutions are more massive than their isotropic counterparts for fixed radius. One consequence of this is a weakening of phase-space constraints on the mass of fermionic dark matter, e.g. neutrinos.

Affiliated with

Also associated with

No associations

Rating

Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter 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 Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zero central density solutions of the anisotropic Jeans equation and neutrino dark matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1315782