Letter to the Editor
The strange case of a sub-DLA with very little HI
Kapteyn Astronomical Institute, University of Groningen, Post Bag 800, 9700 AV Groningen, The Netherlands e-mail: firstname.lastname@example.org
2 National Centre for Radio Astrophysics, Post Bag 3, Ganeshkhind Pune – 411 007, India e-mail: email@example.com
Accepted: 26 November 2004
We report a deep search for HI 21cm emission from the sub-DLA toward PG1216+069 with the Giant Metrewave Radio Telescope. No emission was detected and our upper limit on the mass of any associated galaxy is , nearly 3 orders of magnitude less than . The 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.
Key words: galaxies: evolution / galaxies: formation / galaxies: ISM / cosmology: observations / radio lines: galaxies
© ESO, 2005