Absorption-line spectroscopy of close paris of QSOs

Details Absorption-line spectroscopy of close paris of QSOs Absorption-line spectroscopy of close paris of QSOs

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msngr..31...28s&link_type=abstract

ESO Messenger (ISSN 0722-6691), March 1983, p. 28-31.

Mathematics

Logic

Absorption Spectra, Heavy Elements, Intergalactic Media, Interstellar Matter, Quasars, Red Shift, Cosmology, Gravitational Lenses, Halos, Lyman Alpha Radiation, Radial Velocity

Scientific paper

The presently discussed program of absorption line spectroscopy for close QSO pairs has yielded useful data on eight such pairs, which, combined with data on a further four pairs from the literature, offers information on 20 heavy element absorption systems for which common absorption could be detected and 11 QSO pairs in which associated absorption is detectable. The higher incidence of associated absorption, by comparison with common absorption, suggests that the absorption cross section may be enhanced in the vicinity of QSOs. This is plausible, in light of the QSO UV flux domination of the megagalactic flux over a radius comparable with that of a cluster of galaxies. The discovery of associated absorption in close QSO pairs facilitates a new test of the cosmological interpretation of QSO redshifts.

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