The strange case of a sub-DLA with very little HI

Kanekar, N. ; Chengalur, J. N. (2005) The strange case of a sub-DLA with very little HI Astronomy & Astrophysics, 429 (3). L51-L54. ISSN 0004-6361

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We report a deep search for HI 21cm emission from the z= 0.00632 sub-DLA toward PG1216+069 with the Giant Metrewave Radio Telescope. No emission was detected and our 5σ upper limit on the mass of any associated galaxy is MHI ≲ 107 M , nearly 3 orders of magnitude less than MHI*. The z ~ 0.006 absorber is thus the most extreme known deviation from the standard paradigm in which high column density quasar absorption lines arise in the disks of gas-rich galaxies.

Item Type:Article
Source:Copyright of this article belongs to EDP Sciences.
Keywords:Galaxies: Evolution; Galaxies: Formation; Galaxies: ISM; Cosmology: Observations; Radio Lines: Galaxies
ID Code:63576
Deposited On:29 Sep 2011 04:07
Last Modified:29 Sep 2011 04:07

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