Imaging of galaxies to study the interstellar medium on scales of a few pc is difficult. However, for the Milky Way galaxy two major Galactic all sky HI 21-cm line surveys will become available soon with unprecedented quality. We present the Galactic All Sky Survey (GASS) obtained with the Parkes 64-m telescope for the southern hemisphere with a resolution of 15 arcmin. The Effelsberg Bonn HI Survey (EBHIS) will complete the survey for the northern sky with 9 arcmin resolution and we describe this project. A combined All Sky Survey will become available in 2010/2011, early enough to serve as short spacing information for ASKAP. We envision a Galactic 21-cm line database with arcsecond resolution for all declinations <30 deg.
@article{arxiv.0910.5910,
title = {A panoramic view of the Milky Way HI gas},
author = {Peter M. W. Kalberla and N. M. McClure-Griffiths and J. Kerp},
journal= {arXiv preprint arXiv:0910.5910},
year = {2009}
}
Comments
4 pages, 1 figure, in proceedings of "Panoramic Radio Astronomy: Wide-field 1-2 GHz research on galaxy evolution - PRA2009"