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The environment of radio sources in the VLA-COSMOS survey field

Astrophysics and Space Science Proceedings, ISSN: 1570-6605, Vol: 42, Page: 109-112
2016
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Conference Paper Description

This work studies the correlation among environmental density and radio AGN presence up to z D 2. Using data from the photometric COSMOS survey and its radio 1.4GHz follow-up (VLA-COSMOS), a sample of radio AGNs has been defined. The environment was studied using the richness distributions inside a parallelepiped with base side of 1Mpc and height proportional to the photometric redshift precision. Radio AGNs are found to be always located in environments significantly richer than those around galaxies with no radio emission. Moreover, a distinction based on radio AGN power shows that the significance of the environmental effect is only maintained for low-power radio sources. The results of this work show that denser environments play a significant role in enhancing the probability that a galaxy hosts a radio AGN and, in particular, low-power ones.

Bibliographic Details

N. Malavasi; S. Bardelli; P. Ciliegi; L. Pozzetti; E. Zucca; O. Ilbert

Springer Science and Business Media LLC

Physics and Astronomy; Computer Science; Chemistry; Earth and Planetary Sciences

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