Deep Searches for High Redshift Molecular Absorption
arXiv:astro-ph/0310589
Abstract
Millimetre-band scans of the frequency space towards optically dim quasars is potentially a highly efficient method for detecting new high redshift molecular absorption systems. Here we describe scans towards 7 quasars over wide bandwidths (up to 23 GHz) with sensitivity limits sufficient to detect the 4 redshifted absorbers already known. With wider frequency bands, highly efficient searches of large numbers of possibly obscured objects will yield many new molecular absorbers.
3 pages, conference proceedings to appear in Highlights of Astronomy, ASP (IAU XXV JD21, The Astrochemistry of External Galaxies)