2002MNRAS.331..569S -
Mon. Not. R. Astron. Soc., 331, 569-577 (2002/April-2)
Quasar environment in the context of large-scale structure at z ∼0.3.
SOCHTING I.K., CLOWES R.G. and CAMPUSANO L.E.
Abstract (from CDS):
We look at quasar environment in the context of large-scale structure (LSS) - a new approach, giving a more informed interpretation of quasar-galaxy correlations. This paper presents our first results for a sample of z ∼0.3 quasars. We use Voronoi tessellation applied in colour (BJ-R) slices for the detection of galaxy clusters and the minimal spanning tree (MST) to delineate the large-scale structure. This new cluster detection method allows us to find reliably galaxy clusters at z <0.3 from SuperCOSMOS measurements of UK Schmidt Telescope plates. By reconstructing the large-scale structure in a relatively narrow redshift band (0.2<z <0.3), we show that quasars follow the large-scale structure traced by galaxy clusters. None of the quasars in our radio-quiet sample is located in the central area of a galaxy cluster. Two quasars, found in a very rich environment, are actually located between two very close galaxy clusters, consistent with results on z ∼1 quasars, suggesting that cluster mergers may be involved in one of the quasar formation mechanisms.
Abstract Copyright:
2002 Blackwell Science Ltd
Journal keyword(s):
methods: miscellaneous - galaxies: clusters: general - quasars: general - large-scale structure of Universe
Nomenclature:
Table 1: [SCC2002] JHHMMSS.s+DDMMSS N=8. Table 2: [SCC2002] JHHMM.m+DDMM N=72.
Simbad objects:
85
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