Reference : A search for quasars in a field around NGC 520
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/32952
A search for quasars in a field around NGC 520
English
Gosset, Eric mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Clowes, R. G. [Royal Observatory, Edinburgh, Scotland]
Surdej, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Swings, Jean-Pierre [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
1-Jul-1990
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
245
71-81
Yes (verified by ORBi)
International
0035-8711
Oxford
United Kingdom
[en] QUASARS ; SKY SURVEYS (ASTRONOMY) ; ASTRONOMICAL PHOTOGRAPHY ; COMPUTATIONAL ASTROPHYSICS ; COMPUTER PROGRAMS ; IMAGE ANALYSIS ; SPATIAL DISTRIBUTION
[en] An objective-prism search for quasars was performed in a field around the galaxy NGC 520. The automated quasar detection software has been applied, and a sample of 175 highly rated quasar candidates has been selected. The two- and three-dimensional distributions of the candidates have been analyzed. The distribution on the celestial sphere turns out to be nonrandom. The deviations from randomness are both a tendency to exhibit anticorrelation at the scale of a few arcmin and a significant excess of objects at separations of about 20 arcmin. Finally, in order to test the claims by Arp and Duhalde (1985) that an excess of quasars exists near NGC 520 and that there is a preferential NE-SW alignment of bright quasars across this amorphous galaxy, various statistical analyses of the distribution of the high-grade quasar candidates with respect to NGC 520 were performed. No sign of any possible relation is present in the data.
Researchers ; Professionals
http://hdl.handle.net/2268/32952
http://adsabs.harvard.edu/abs/1990MNRAS.245...71G
The authors thank SAO/NASA ADS Astronomy Abstract Service for their deposit authorization and Blackwell Publishing for publication. The definitive version is available at www.blackwell-synergy.com

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