Volume 394, Number 3, November II 2002
|Page(s)||763 - 768|
|Published online||21 October 2002|
A search for molecules in damped Lyman-alpha absorbers occulting millimetre-loud quasars*
School of Physics, University of New South Wales, Sydney NSW 2052, Australia
2 European Southern Observatory, Casilla 19001, Santiago 19, Chile
3 Observatorio Cerro Calan, Universidad de Chile, Santiago, Chile
4 Onsala Space Observatory, Chalmers University of Technology, 439 92 Onsala, Sweden
5 Astronomical Observatory, Volgina 7, 11160 Belgrade, Serbia
Corresponding author: S. Curran, firstname.lastname@example.org
Accepted: 27 August 2002
We have used the SEST 15-metre and Onsala 20-metre telescopes to perform deep ( mJy) integrations of various molecular rotational transitions towards damped Lyman-alpha absorption systems (DLAs) known to occult millimetre-loud quasars. We have observed 6 new systems and improved the existing limits for 11 transitions. These limits may be approaching the sensitivities required to detect new systems and we present a small number of candidate systems which we believe warrant further observation.
Key words: quasars: absorption lines / cosmology: observations / cosmology: early Universe
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.