Mathematics – Logic
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..598s&link_type=abstract
IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr
Mathematics
Logic
5
Absorption Spectra, Astronomical Spectroscopy, Quasars, Cosmology, Line Spectra, Red Shift
Scientific paper
The comparison of the absorption spectra of close pairs of QSOs makes it possible to study directly the sizes and clustering of absorbing regions. Phenomena of interest are related to Common Absorption (absorption in both spectra at the same redshift), and Associated Absorption (absorption at the redshift of the foreground QSO in the spectrum of the other member of the pair). The present study is concerned with a recent observation of the pair Q1548 + 114A,B. This pair was studied spectroscopically by Wampler et al. (1973) and by Burbidge et al. (1977). Spectra obtained of these two QSOs show that the absorption lines in B can be accounted for by five absorption systems. It was found that Q1548 + 114A,B exhibits neither associated nor common absorption. The implications of this result are discussed, taking into account the cosmological interpretation of QSO redshifts and the nature of the absorbing matter.
Robertson Gordon J.
Shaver Peter A.
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