Fishing for absorption lines with SEST. The redshift of the gravitational lens to PKS 1830-211.

Details Fishing for absorption lines with SEST. The redshift of the gravitational lens to PKS 1830-211. Fishing for absorption lines with SEST. The redshift of the gravitational lens to PKS 1830-211.

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996msngr..84...23w&link_type=abstract

The Messenger, vol. 84, p. 23-26

Computer Science

1

Gravitational Lenses: Redshifts, Gravitational Lenses: Absorption Lines

Scientific paper

Molecular gas is the cold and dense part of the interstellar medium (ISM) which is directly involved in the formation of stars. The possibility of studying this ISM component at high redshifts would give us an insight in the conditions for stellar formation when these may have been quite different from what is seen in present-day galaxies. Gravitationally magnified CO emission is not the only means to study molecular gas at high redshifts. Just as in the optical wavelength band, it is easier to detect molecular absorption lines than the corresponding emission lines and, with an appropriate alignment of an intervening galaxy and a background radio continuum source, it is possible to probe the molecular ISM at very large distances.

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