Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..605p&link_type=abstract
Astrophysical Journal, Part 1, vol. 218, Dec. 15, 1977, p. 605-610. NSF-supported research.
Astronomy and Astrophysics
Astronomy
26
Absorption Spectra, H Lines, Magnesium, Quasars, Radio Sources (Astronomy), Galaxies, H I Regions, Metal Ions, Red Shift
Scientific paper
At least two QSOs, PHL 938 and 3C 286, and two BL Lacertae objects, AO 0235+164 and PKS 0735+178, show absorption lines characteristic of material in a low-ionization state. Optical and radio observations of these objects are analyzed to determine whether the absorption lines are consistent with the hypothesis that the absorption occurs in H I regions, such as might be expected in an intervening galaxy. The results are consistent with this hypothesis, although other possible origins of the absorption lines cannot be excluded. The magnesium abundances and iron-to-magnesium ratios are consistent with solar values. Evidence is presented for the existence of multiple redshift systems in PHL 938.
Coleman Gary D.
Peterson Bradley. M.
Strittmatter Peter A.
Williams Robert E.
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