Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377l..73l&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. L73-L77.
Astronomy and Astrophysics
Astrophysics
82
Absorption Spectra, Galactic Evolution, Lyman Alpha Radiation, Molecular Clouds, Quasars, Red Shift, Astronomical Spectroscopy, Charge Coupled Devices, Cosmology, Fabry-Perot Spectrometers, Line Spectra
Scientific paper
The detection of a galaxy associated with the damped Ly-alpha absorbing cloud seen at z = 2.309 toward the QSO PHL 957 is reported. In addition to a strong but narrow Ly-alpha emission line and weaker C IV and He II lines, the object shows continuum at V about 24, with a slope rising slightly toward the red. This is similar to what is seen in high-redshift radio galaxies, but this galaxy does not correspond to any known radio source. The detected emission lines and continuum are most easily interpreted as light from hot, recently formed stars, implying a sizable star formation rate and a scarcity of dust. The spatial correlation of the absorbing cloud and the companion galaxy supports the interpretation of damped Ly-alpha clouds as objects fundamentally different from the lower column density Ly-alpha forest clouds, which show weak or no clustering.
Brown Laurel
Caulet Adeline
Foltz Craig B.
Green Richard F.
Hogan Craig J.
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