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The Environment of Radio Sources in the VLA-COSMOS Survey Field

Abstract : This work studies the correlation among environmental density and radio AGN presence up to z = 2. Using data from the photometric COSMOS survey and its radio 1.4 GHz 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 1 Mpc 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.
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https://hal-insu.archives-ouvertes.fr/insu-03690639
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Submitted on : Wednesday, June 8, 2022 - 2:25:48 PM
Last modification on : Friday, June 10, 2022 - 3:03:43 AM

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N. Malavasi, S. Bardelli, P. Ciliegi, O. Ilbert, L. Pozzetti, et al.. The Environment of Radio Sources in the VLA-COSMOS Survey Field. The Universe of Digital Sky Surveys, Astrophysics and Space Science Proceedings, 0000, à renseigner, Unknown Region. pp.109, ⟨10.1007/978-3-319-19330-4_17⟩. ⟨insu-03690639⟩

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