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Projected Clustering Around 1 < Z < 2 Radiogalaxies

Published online by Cambridge University Press:  25 May 2016

E. Martínez-González ,
N. Benítez ,
J. I. González-Serrano  and
L. Cayón
E. Martínez-González
Affiliation:
Dpto. de Física Moderna, Universidad de Cantabria and Instituto de Física de Cantabria, CSIC–Universidad de Cantabria, Facultad de Ciencias, Avda. de Los Castros s/n, 39005 Santander, Spain
N. Benítez
Affiliation:
Dpto. de Física Moderna, Universidad de Cantabria and Instituto de Física de Cantabria, CSIC–Universidad de Cantabria, Facultad de Ciencias, Avda. de Los Castros s/n, 39005 Santander, Spain
J. I. González-Serrano
Affiliation:
Dpto. de Física Moderna, Universidad de Cantabria and Instituto de Física de Cantabria, CSIC–Universidad de Cantabria, Facultad de Ciencias, Avda. de Los Castros s/n, 39005 Santander, Spain
L. Cayón
Affiliation:
Lawrence Berkeley Laboratory and Center for Particle Astrophysics, Berkeley, CA 94720, USA

Abstract

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We have taken deep R-band images of fields around five radiogalaxies: 0956+47, 1217+36, 3C256, 3C324 and 3C294 with 1 < z < 2. We found a statistically significant excess of bright (19.5 < R < 22) galaxies on scales of 2 arcmin around the radiogalaxies. The excess has been determined empirically to be at ≳99.5% level. It is remarkable that this excess is not present for 22 < R < 23.75 galaxies within the same area, suggesting that the excess is not physically associated to the galaxies but due to intervening groups and then related to gravitational lensing.

Type
Part II: Contributed Papers
Information
Symposium - International Astronomical Union , Volume 168: Examining the Big Bang and the Diffuse Background Radiations , 1996 , pp. 493 - 496
Copyright
Copyright © Kluwer 1996 

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