High velocity gas from the Galactic dark halo
| dc.creator | Walker, Mark | |
| dc.creator | Wardle, Mark | |
| dc.date | 1998-11-13 | |
| dc.date.accessioned | 2026-07-07T02:29:06Z | |
| dc.date.available | 2026-07-07T02:29:06Z | |
| dc.description | We present the germ of a new model for High Velocity Clouds, derived from the idea that the dark matter halo of our Galaxy is in the form of cold, planetary-mass gas clouds. In this picture HVCs arise as a result of disruptive collisions between dark matter clouds: high velocity atomic gas is a natural consequence of the dark halo kinematics, and is intimately associated with assembly of the visible Galaxy. Quasi-spherical halo models predict a broad 21 cm line background, together with a number of individually detectable, low-mass HVCs conforming to a particular velocity field. A halo model which incorporates satellite substructure -- after the fashion of the current paradigm of hierarchical structure formation -- includes both these components and, in addition, some massive HVCs. These latter HVCs are simply the wakes of the orbiting satellite halos, and each may have a mass up to 0.3% of the mass of the satellite. | |
| dc.description | 7 pages, 1 figure, LaTeX (uses paspconf.sty) To appear in Proc. Stromlo Workshop on High Velocity Clouds (PASP) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9811209 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9811209 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13334 | |
| dc.subject | Astrophysics | |
| dc.title | High velocity gas from the Galactic dark halo | |
| dc.type | text |