J/MNRAS/453/1079 Sub-mJy radio sources SF properties (Bonzini+, 2015)
Star formation properties of sub-mJy radio sources.
Bonzini M., Mainieri V., Padovani P., Andreani P., Berta S., Bethermin M.,
Lutz D., Rodighiero G., Rosario D., Tozzi P., Vattakunnel S.
<Mon. Not. R. Astron. Soc., 453, 1079-1094 (2015)>
=2015MNRAS.453.1079B 2015MNRAS.453.1079B (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Infrared sources ; Radio sources
Keywords: surveys - galaxies: active - galaxies: starburst -
galaxies: star formation - radio continuum: galaxies
Abstract:
We investigate the star formation properties of ∼800 sources detected
in one of the deepest radio surveys at 1.4GHz. 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.
Description:
In this work, we investigated the SF properties of the faint radio
population as detected by one of the deepest 1.4 GHz survey up-to-date
conducted with the VLA in the E-CDFS. This study builds upon the
results presented in Bonzini et al. (2012, Cat. J/ApJS/203/15 and
2013, Cat. J/MNRAS/436/3759) where we have exploited the wealth of
multiwavelength data available in this field to identify the AGNs,
further divide them into RL and RQ, and characterize the properties of
the radio selected galaxies (e.g. redshift, stellar mass).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 99 779 Star formation properties of the VLA sources
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See also:
J/ApJS/203/15 : Counterparts to 1.4GHz sources in ECDF-S (Bonzini+, 2012)
J/MNRAS/436/3759 : ECDFS sources optical/IR counterparts (Bonzini+, 2013)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- RID Identification number of the radio source,
[MBF2013] NNN in Simbad
5- 10 A6 --- Class Source classification
12- 14 A3 --- Type Source activity (1)
16- 20 F5.3 --- z ?=- Source redshift
23- 29 F7.4 [Msun] logMstar ?=- Stellar mass
31- 36 F6.4 [Msun] e_logMstar ?=- rms uncertainty on logMstar
38- 48 F11.4 Msun/yr SFRr ?=- SFR derived from the radio power
50- 58 F9.4 Msun/yr e_SFRr ?=- rms uncertainty on SFRr
60- 69 F10.4 Msun/yr SFRfir ?=- SFR derived from the FIR luminosity
71- 79 F9.4 Msun/yr e_SFRfir ?=- rms uncertainty on sfrFIR
82- 89 F8.4 [-] logsSFR ?=- Specific SFR (SFR divided by the
stellar mass)
91- 97 F7.4 [-] logsSFRex ?=- Distance with respect to the MS in the
SFR-Mstar plane (Section 8.3)
99 A1 --- PACS? [0-1] PACS flag (2)
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Note (1): source activity as follows:
SB = starburst galaxies
MS = main-sequence galaxies
P = passive galaxies according to the definition given in Section 8
Note (2): PACS flag as follows:
0 = only upper limits in the PACS bands
1 = at least one PACS detection
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Mar-2016