Kanekar, N. ; Chengalur, J. N. ; Subrahmanyan, R. ; Petitjean, P. (2001) ATCA search for 21 cm emission from a candidate damped Ly-α absorber at z = 0.101 Astronomy & Astrophysics, 367 (1). pp. 46-50. ISSN 0004-6361
Full text not available from this repository.
Official URL: http://www.aanda.org/index.php?option=com_article&...
Related URL: http://dx.doi.org/10.1051/0004-6361:20000420
Abstract
We report a deep search for 21 cm emission/absorption from the z ~ 0.101 candidate damped Lyman-α system towards PKS 0439-433, using the Australia Telescope Compact Array (ATCA). The spectrum shows a weak absorption feature -at the 3.3σ level -which yields a lower limit of 730 K on the spin temperature of the system. No H I emission was detected: the upper limit on the H I mass of the absorber is 2.25 109 MO , for a velocity spread of ~70 km s−1. The low H I mass and the high spin temperature seem to rule out the possibility that the absorber is a large gas-rich spiral galaxy.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to EDP Sciences. |
| Keywords: | Cosmology: Observations; Galaxies: Individual: PKS 0439-433; Radio Lines: General |
| ID Code: | 63533 |
| Deposited On: | 29 Sep 2011 04:03 |
| Last Modified: | 29 Sep 2011 04:03 |
Repository Staff Only: item control page
