Molecular absorption lines at high redshift

Details Molecular absorption lines at high redshift Molecular absorption lines at high redshift

1997-12-10

arxiv.org/abs/astro-ph/9712139v1

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, to be published in the Proceedings of the Green Bank Symposia ``Highly Redshifted Radio Lines'' Oct 9-11 1

Scientific paper

The four known molecular absorption line systems at redshifts z$=$0.25--0.89 are discussed. Two of the systems originate in the galaxy hosting the `background' AGN, while in two cases the absorption occurs in truely intervening galaxies. Indirect evidence for the existence of very small scale structure in the molecular ISM is presented. A new absorption line at z$=$0.89 towards PKS1830--211 opens up interesting possibilities to accurately derive the mass of the lensing galaxy.

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