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25 April 2024 |
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HI Emission and Absorption in the Southern Galactic Plane Survey | | N. M. McClure-Griffiths
; John M. Dickey
; B. M. Gaensler
; A. J. Green
; R. F. Haynes
; M. H. Wieringa
; | | Date: |
15 Dec 2000 | | Subject: | astro-ph | | Affiliation: | U of Minnesota, MIT, Sydney University, ATNF | | Abstract: | 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 (325.5 deg < l < 333.5 deg; -0.5 deg < b < 3.5 deg) were completed in December 1998. Single dish observations of the full survey region (253 deg < l < 358 deg; |b| <1 deg) with the Parkes Radio Telescope were completed in March 2000. We present a sample of SGPS HI 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 HI shells. On the small scale, we note extremely compact, cold clouds seen in HI self-absorption. We explore how these two classes of objects probe opposite ends of the HI spatial power spectrum. | | Source: | arXiv, astro-ph/0012359 | | Services: | Forum | Review | PDF | Favorites | |
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