Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...344..277l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 344, Sept. 1, 1989, p. 277-291.
Astronomy and Astrophysics
Astrophysics
28
Cosmic Dust, Hydrogen, Interstellar Matter, Lyman Alpha Radiation, Quasars, Absorption Spectra, Abundance, Astronomical Spectroscopy, Doppler Effect, H I Regions, Metal Ions, Milky Way Galaxy
Scientific paper
Spectroscopic and spectrophotometric observations and analyses are presented with the aim of ascertaining the presence of molecular hydrogen and dust in the damped Ly-alpha absorber toward Q1337+113. These observations are not sensitive to dust abundances. It is found that the abundance ratios of the metal elements are consistent with solar values, and that the C exp 0 column density is at least 200 times lower than for the H II region toward Zeta Oph. These results are consistent with a lack of dust in the absorber. A model of the equilibrium abundance of H2 is constructed, and the observed limit to the fractional H2 abundance is found capable of placing an independent upper limit on the dust content of the absorber at less than one-third the Galactic value.
Lanzetta Kenneth M.
Turnshek David A.
Wolfe Arthur M.
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