Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...382...26t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 382, Nov. 20, 1991, p. 26-31. Research supported by NASA and ESA.
Astronomy and Astrophysics
Astrophysics
20
Galactic Evolution, Quasars, Red Shift, Absorption Spectra, Emission Spectra, Luminosity, Lyman Alpha Radiation, Spectral Line Width, Star Formation
Scientific paper
The discovery of an unresolved radio-quiet object with a redshift of 3.409 and visual magnitude of 24.3 +/-0.5 is reported. The object was identified during an imaging search for Ly-alpha emission near the redshift of a z(abs) = 3.390-damped Ly-alpha absorption-line system which appears in the spectrum of the z(em) = 4.11 QSO 0000-2619. It is determined that the bulk of the object's Ly-alpha and continuum emission comes from an unresolved region less than 9 kpc, and its absolute magnitude in the rest-frame UV near Ly-alpha is about -21.2. A long-slit CCD spectrum at 500 km/s resolution shows that it has kinematically unresolved Ly-alpha emission with a rest equivalent width in the range of about 10-20 A. The object is observed to be about 135 kpc in projection from the sight line to the WSO. No emission at the redshift of the damped Ly-alpha absorber is detected.
Bencke M. V.
Hazard Cyril
Macchetto Ferdinando
McMahon Richard G.
Sparks William B.
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