Deep Searches for High Redshift Molecular Absorption

(2) Institute of Astronomy; (3) Nobeyama Radio Observatory; Australia; Japan); J. K. Webb (1); M. T. Murphy (2); N. Kuno (3) ((1) University of New South Wales; S. J. Curran (1); UK

arxiv: astro-ph/0310589 · v1 · submitted 2003-10-21 · 🌌 astro-ph

Deep Searches for High Redshift Molecular Absorption

S. J. Curran (1) , J. K. Webb (1) , M. T. Murphy (2) , N. Kuno (3) ((1) University of New South Wales , Australia , (2) Institute of Astronomy , UK , (3) Nobeyama Radio Observatory

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keywords molecularabsorbersabsorptionefficientfrequencyhighhighlyquasars

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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.

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Deep Searches for High Redshift Molecular Absorption

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