Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phys...17..205b&link_type=abstract
(Niels Bohr Institut, Teknisk Videnskabelige Forskningsrad, and Nordisk Institut for Teoretisk Atomfysik, Symposium on Quasars a
Astronomy and Astrophysics
Astrophysics
38
Absorption Spectra, Astrophysics, Line Spectra, Quasars, Red Shift, Abundance, Gas Flow, Interstellar Radiation, Line Shape, Mass Flow Rate
Scientific paper
The physical properties of the absorption systems observed in high redshift QSOs are described in some detail. Apart from the very broad absorption lines seen in a few objects, which almost certainly are due to intrinsic mass outflow, the great majority of the narrow absorption lines commonly present in QSO spectra, ranging in relative velocity from a large fraction of c outward to a few thousand km/s inward, all of which are characteristically similar and resemble interstellar lines, can be most naturally explained as being produced in cosmologically distributed intervening material consisting of both enriched and primordial gas.
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