Browsing by Author "47d76988-fb9e-4c80-b76d-aef57e4e7235"

Now showing items 1-4 of 4

    • A 3D Voronoi+Gapper Galaxy Cluster Finder in Redshift Space to z ∼ 0.2. II. An Abundant Cluster Population ... 
      Campusano Brown, Luis; Marinello, Gabriel; Clowes, Roger G.; Haines, Christopher P.; Pereira, Sebastián; Pizarro, Daniel; Hitschfeld Kahler, Nancy; Söchting, Ilona K. (IOP, 2020)
      We identify 1901 galaxy clusters (N-g >= 2) with the VoML+G algorithm (Paper I) on the Two-Degree Field Galaxy Redshift Survey. We present the 341 clusters with at least 10 galaxies that are within 0.009 < z < 0.14 (the ...
    • Compatibility of the large quasar groups with the concordance cosmological model 
      Marinello, Gabriel E.; Clowes, Roger G.; Campusano Brown, Luis; Williger, Gerard M.; Sochting, Ilona K.; Graham, Matthew J. (2016)
      We study the compatibility of large quasar groups with the concordance cosmological model. Large quasar groups are very large spatial associations of quasars in the cosmic web, with sizes of 50-250 h(-1) Mpc. In particular, ...
    • Relation of radio-quiet quasars to galaxy clusters at z < 0.3 
      Söchting, Ilona K.; Clowes, Roger G.; Campusano Brown, Luis (2004)
      We investigate whether radio-quiet quasars (RQQs) with z < 0.3 (and predominantly of low luminosity) are located preferentially in specific regions with respect to the centres and boundaries of neighbouring galaxy clusters. ...
    • Ultraviolet Fe ii emission in fainter quasars: luminosity dependences, and the influence of environments 
      Clowes, Roger G.; Haberzettl, Lutz; Raghunathan, Srinivasan; Williger, Gerard M.; Mitchell, Sophia M.; Sochting, Ilona K.; Graham, Matthew J.; Campusano Brown, Luis (Oxford Univ. Press, 2016)
      We investigate the strength of ultraviolet Fe ii emission in fainter quasars compared with brighter quasars for 1.0 a parts per thousand currency sign z a parts per thousand currency sign 1.8, using the Sloan Digital Sky ...