{Excesses of faint galaxies around seven radio QSOs at 1.0<z<1.6

Details {Excesses of faint galaxies around seven radio QSOs at 1.0<z<1.6 {Excesses of faint galaxies around seven radio QSOs at 1.0<z<1.6

1999-10-27

arxiv.org/abs/astro-ph/9910485v1

Astronomy and Astrophysics

Astrophysics

1 TeX file,8 figures, Acepted for publishing in Astronomy & Astrophysics

Scientific paper

We have conducted an optical study of the environments of seven radio-loud quasars at redshifts 122.5 and R>22.0) galaxies on scales of r<170'' and r<35'' around the quasars. The number of excess galaxies, their magnitudes and the angular extension of the excesses are compatible with clusters of galaxies at the redshift of the QSOs. We also found that the quasars of our sample are in general {\it not} located at the peak of the density distribution, lying in a projected distance of about $\sim$70'' from it. This result agrees with the scenario of a link between overdensities of galaxies around radio sources and the origin of their radio emission.

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