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http://hdl.handle.net/2289/723
Title: | GMRT detection of HI 21 cm-line absorption from the peculiar galaxy in Abell 2125. |
Authors: | Dwarakanath, K.S. Owen, F.N. |
Keywords: | Galaxies; Individual (A2 125); Active - galaxies; Clusters; Star-burst; Radio lines; |
Issue Date: | 2001 |
Publisher: | Indian Academy of Sciences, Bangalore, India. |
Citation: | Journal of Astrophysics and Astronomy, 2001, Vol.22, p1-8. |
Abstract: | Using the recently completed Giant Meterwave Radio Telescope, we have detected the HI 21 cm-line absorption from the peculiar galaxy C153 in the galaxy cluster Abell 2125. The HI absorption is at a redshift of 0.2533, with a peak optical depth of 0.36. The full width at half minimum of the absorption line is 100 km/s. The estimated column density of atomic Hydrogen is 0.7e22(Ts/100K) per sq. cm. The HI absorption is redshifted by ~ 400 km/s compared to the [OIII] emission line from this system. We attribute this to an in-falling cold gas, or to an out-flowing ionised gas, or to a combination of both as a consequence of tidal interactions of C153 with either a cluster galaxy or the cluster potential. |
URI: | http://hdl.handle.net/2289/723 |
ISSN: | 0250-6335 |
Copyright: | Indian Academy of Sciences, Bangalore, India. |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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2001_JAA_V22_p1-8.pdf | 8p. | 431.88 kB | Adobe PDF | View/Open |
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