
%0 Journal Article
%A McClure-Griffiths, N. M. 
%A Dickey, John M. 
%A Gaensler, B. M. 
%A Green, A. J. 
%A Haynes, R. F. 
%A Wieringa, M. H. 
%T H <font size="-2">I</font> Emission and Absorption in the Southern Galactic Plane Survey
%J Publications of the Astronomical Society of Australia
%D 2001/07/25
%V 18
%N 1
%P 84-90
%K Galaxy &#8212; ISM: bubbles, clouds,structure
%R https://doi.org/10.1071/AS01010
%U https://www.publish.csiro.au/paper/AS01010 
%X We present preliminary results from the Southern Galactic Plane Survey (SGPS) Test Region and Parkes data. As part of the pilot project for the Southern Galactic Plane Survey, observations of a Test Region (325&#183;5&#176; &#8804;l &#8804; 333&#183;5&#176;; &#8722;0&#183;5&#176; &#8804; b &#8804; 3&#183;5&#176;) were completed in December 1998. Single-dish observations of the full survey region (253&#176; &#8804; l &#8804; 358 &#176; |b| &#8804; 1&#176;) with the Parkes Radio Telescope were completed in March 2000. We present a sample of SGPS H I data, with particular attention to the smallest- and largest-scale structures seen in absorption and emission, respectively. On the large scale, we detect many prominent H I shells. On the small scale, we note extremely compact, cold clouds seen in H I self-absorption. We explore how these two classes of objects probe opposite ends of the H I spatial power spectrum. 
