Hydrodynamical description of Galactic Dark Matter
| dc.creator | Cabral-Rosetti, Luis G. | |
| dc.creator | Nunez, Dario | |
| dc.creator | Sussman, Roberto A. | |
| dc.creator | Matos, Tonatiuh | |
| dc.date | 2002-06-08 | |
| dc.date.accessioned | 2026-07-07T03:47:14Z | |
| dc.date.available | 2026-07-07T03:47:14Z | |
| dc.description | We consider simple hydrodynamical models of galactic dark matter in which the galactic halo is a self-gravitating and self-interacting gas that dominates the dynamics of the galaxy. Modeling this halo as a sphericaly symmetric and static perfect fluid satisfying the field equations of General Relativity, visible barionic matter can be treated as ``test particles'' in the geometry of this field. We show that the assumption of an empirical ``universal rotation curve'' that fits a wide variety of galaxies is compatible, under suitable approximations, with state variables characteristic of a non-relativistic Maxwell-Boltzmann gas that becomes an isothermal sphere in the Newtonian limit. Consistency criteria lead to a minimal bound for particle masses in the range $30 \hbox{eV} \alt m \alt 60 \hbox{eV}$ and to a constraint between the central temperature and the particles mass. The allowed mass range includes popular supersymmetric particle candidates, such as the neutralino, axino and gravitino, as well as lighter particles ($m\sim$ keV) proposed by numerical N-body simulations associated with self-interactive ``cold'' and ``warm'' dark matter structure formation theories. | |
| dc.description | RevTex4 style, 7 pages including 3 figures. Final version to appear in Proceeedings of the IV Taller de la Division de Gravitacion y Fisica Matematica de la Sociedad Mexicana de Fisica (DGyFM-SMF). Chapala, Jalisco, Mexico November 25 - November 30, 2001 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0206082 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0206082 | |
| dc.identifier | Rev.Mex.Fis. 49S2 (2003) 91-97 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/41586 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Hydrodynamical description of Galactic Dark Matter | |
| dc.type | text |