Other
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312...50b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 1, 1987, p. 50-65.
Other
39
Absorption Spectra, Astronomical Spectroscopy, Lyman Spectra, Quasars, Stellar Composition, High Resolution, Interstellar Matter, Ionization, Line Spectra, Metallicity
Scientific paper
The authors observed several species of the absorption line system at z = 1.79 toward the bright quasar B2 1225+317 (zem = 2.22, mv = 15.9) with the echelle spectrograph on the MMT, at a resolution of 10 km s-1. The absorption-line profiles differ from species to species, with some velocity components showing absorption in both low-ionization species (Mg I, Mg II, Fe II, Si II, C II) and high-ionization species (C IV and Si IV), while other components show absorption only in C IV and Si IV. The relative column densities of Si II, Mg II, Zn II, Fe II, and H I are consistent with the local interstellar medium values. The properties of the radiation field longward of the Lyman limit are investigated.
Bechtold Jill
Green Richard F.
York Don G.
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