| Description: | The two-way flow of matter into and out of the disk of the Milky Way is critical to the Galaxy's survival and evolution. The lower halo (z<2 kpc), in particular, is a hive of activity. Observations with the Green Bank Telescope in 2002 by Lockman revealed a surprising wealth of small scale structure in the lower halo and suggested that as much as one-half the mass of the halo might be locked in previously undetected small scale, tens of parsecs-sized, clouds. To understand the nature of these clouds and their role in the disk-halo interaction of the Milky Way we conducted the Galactic All-Sky Survey (GASS) with the Parkes Radio Telescope. GASS is a high angular and spectral resolution survey of the atomic hydrogen south of declination zero. In this talk I will present the newly released GASS data, discuss the distribution and nature of small-scale halo clouds, and suggest a possible origin for the clouds.
The image above is a result of the GASS (Galactic All-Sky Survey) project of atomic hydrogen in the Southern sky. |
