HI Clouds Beyond the Galactic Disk
arXiv:astro-ph/0311047 · doi:10.1007/1-4020-2620-X_2
Abstract
Recent observations in the 21cm line with the Green Bank Telescope have changed our view of the neutral interstellar medium (ISM) in several ways. The new data show that in the inner parts of the Milky Way the disk-halo interface is composed of many discrete HI clouds. The clouds lie in a layer more than one kpc thick and follow Galactic rotation. Their origin and evolution is unknown. In the outer Galaxy, the new data show that the high-velocity cloud Complex H is likely a satellite on a retrograde orbit interacting with some extended component of the Milky Way's ISM. These observations place new constraints on models of the ISM and are directly related to the work of Don Cox and Ron Reynolds.
8 pages includes 2 figures. To appear in "How Does the Galaxy Work?", eds. E.J. Alfaro, E. Perez, & J. Franco, Kluwer, Proceedings of a Conference held 23-27 June 2003 in Granada, Spain
References in corpus (5)
- The Magellanic Stream, High-Velocity Clouds and the Sculptor Group
- Discovery of a Population of HI Clouds in the Galactic Halo
- Dynamical evolution of high velocity clouds in the intergalactic medium
- High Velocity Cloud Complex H: A Satellite of the Milky Way in a Retrograde Orbit?
- Tidal radii of globular clusters and the mass of the Milky Way