Dynamical Instabilities in Hollow Halo Models

Details Dynamical Instabilities in Hollow Halo Models Dynamical Instabilities in Hollow Halo Models

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...419l..17b&link_type=abstract

Astrophysical Journal Letters v.419, p.L17

Astronomy and Astrophysics

Astronomy

3

Cosmology: Dark Matter, Galaxies: Formation, Galaxies: Kinematics And Dynamics, Instabilities

Scientific paper

Massive neutrinos, it has been argued, cannot make up the dark mass in galactic halos without violating cosmological constraints on their phase space density. This argument might be weakened by allowing the neutrino distribution function to be anisotropic; the proposed anisotropic systems have density profiles showing a local minimum at the origin. Here, the dynamical stability of such "hollow halos" is investigated; some are violently unstable.

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