EAS Publications Series
Volume 56, 2012The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall?
|Page(s)||285 - 289|
|Section||The Active Disk-Halo Connection: Infall vs. Outflows|
|Published online||17 September 2012|
Miguel A. de Avillez (ed)
EAS Publications Series, 56 (2012) 285–289
Implications of the Distribution of HI Clouds in the Lower Galactic Halo
1 Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail H39, PO Box 218, Hawthorn, Victoria 3122, Australia ;
2 Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 1710, Australia
3 National Radio Astronomy Observatory, PO Box 2, Green Bank, WV 24944, USA
We have detected hundreds of HI clouds in the lower Galactic halo within the Galactic All-Sky Survey pilot region, a region spanning 325∘≤ l ≤ 343∘ and |b|≤ 20∘. The motions of these clouds are governed by Galactic rotation, they are seen within the disk and up to heights of 2.5 kpc, and they span a wide range of Galactocentric radii. However, these clouds are not uniformly distributed and appear to be associated with Galactic structures such as spiral arms or superbubbles.
© EAS, EDP Sciences, 2012