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, email@example.com
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
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