Article (Scientific journals)
Spectroscopic observations of thirteen optically-selected QSOs in a large field centred around NGC 5334
Surdej, Jean; Swings, Jean-Pierre; Arp, H. C. et al.
1982In Astronomy and Astrophysics, 114, p. 182-187
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Keywords :
QUASARS; RED SHIFT; SPECTRAL LINE WIDTH; ABSORPTION SPECTRA; LUMINOSITY; SPACE DENSITY; SPECTRUM ANALYSIS; ULTRAVIOLET SPECTRA; ASTRONOMICAL SPECTROSCOPY
Abstract :
[en] A large field (approximately 25 sq deg) around NGC 5334 was searched for QSO candidates with ultraviolet-excess, in order to investigate the space density, distribution, and luminosity of quasars near as well as far from bright galaxies. Spectroscopic data obtained with the European Southern Observatory 3.6 m telescope are presented for 13 quasars identified within a sample of 23 observed candidates. As expected, the redshift of these optically selected quasars was found to fall in the range 0.23-2.08, with only one exception. Two, and possibly three, of the quasars of the largest redshift show absorption lines, while the remaining 10 faint blue objects display zero-redshift stellar spectra.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Swings, Jean-Pierre ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Arp, H. C.;  Mount Wilson and Las Campanas Observatories, Pasadena, CA
Barbier, R.;  European Southern Observatory, La Silla, Chile
Language :
English
Title :
Spectroscopic observations of thirteen optically-selected QSOs in a large field centred around NGC 5334
Publication date :
1982
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
114
Pages :
182-187
Peer reviewed :
Peer Reviewed verified by ORBi
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