Star formation properties of sub-mJy radio sources

Journal
Date Issued
2015
Author(s)
Bonzini, M.
•
Mainieri, V.
•
Padovani, P.
•
Andreani, P.
•
Berta, S.
•
Bethermin, M.
•
Lutz, D.
•
Rodighiero, G.
•
Rosario, D.
•
•
Vattakunnel, S.
DOI
Description
This work is based on observations with the National Radio Astronomy Observatory which is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KU Leuven, CSL, IMEC (Belgium); CEA, LAM (France); MPIA (Germany); INAF-IFSI/OAA/OAP/OAT, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI/INAF (Italy), and CICYT/MCYT (Spain).
Abstract
We investigate the star formation properties of ̃800 sources detected in one of the deepest radio surveys at 1.4 GHz. Our sample spans a wide redshift range (̃0.1-4) and about four orders of magnitude in star formation rate (SFR). It includes both star-forming galaxies (SFGs) and active galactic nuclei (AGNs), further divided into radio-quiet (RQ) and radio-loud objects. We compare the SFR derived from the far-infrared luminosity, as traced by Herschel, with the SFR computed from their radio emission. We find that the radio power is a good SFR tracer not only for pure SFGs but also in the host galaxies of RQ AGNs, with no significant deviation with redshift or specific SFR. Moreover, we quantify the contribution of the starburst activity in the SFG population and the occurrence of AGNs in sources with different level of star formation. Finally, we discuss the possibility of using deep radio survey as a tool to study the cosmic star formation history.
Volume
453
Issue
1
Start page
1079
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2015MNRAS.453.1079B
Rights
open.access
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