J/MNRAS/478/3848 Radio-emitting AGN environmental prop. (Magliocchetti+, 2018)
The environmental properties of radio-emitting AGN.
Magliocchetti M., Popesso P., Brusa M., Salvato M.
<Mon. Not. R. Astron. Soc., 478, 3848-3854 (2018)>
=2018MNRAS.478.3848M 2018MNRAS.478.3848M (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Radio sources ; Redshifts
Keywords: galaxies: active - galaxies: starburst - dark matter -
large-scale structure of Universe - cosmology: observations -
radio continuum: galaxies
Abstract:
We study the environmental properties of z≤1.2 radio-selected active
galactic nuclei (AGNs) belonging to the ∼2deg2 of the COSMOS field,
finding that about 20 per cent of them appear within overdense
structures. AGNs with P1.4GHz>1023.5W/Hz/sr are twice more likely
to be found in clusters with respect to fainter sources (∼38 per cent
vs ∼15 per cent), just as radio-selected AGNs with stellar masses
M*>1011M☉ are twice more likely to be found in overdense
environments with respect to objects of lower mass (∼24 per cent vs
∼11 per cent). Comparisons with galaxy samples further suggest that
radio-selected AGN of large stellar mass tend to avoid underdense
environments more than normal galaxies with the same stellar content.
Stellar masses also seem to determine the location of radio-active AGN
within clusters: ∼100 per cent of the sources found as satellite
galaxies have M*<1011.3M☉, while ∼100 per cent of the AGNs
coinciding with a cluster central galaxy have M*>1011M☉. No
different location within the cluster is instead observed for AGN of
various radio luminosities. Radio AGN, which also emit in the
Mid-Infrared show a marked preference to be found as isolated galaxies
(∼70 per cent) at variance with those also active in the X-ray that
all seem to reside within overdensities. What emerges from our work is
a scenario whereby physical processes on sub-pc and kpc scales (e.g.
emission, respectively, related to the AGN and to star formation) are
strongly interconnected with the large-scale environment of the AGN
itself.
Description:
We present the environmental properties of z≤1.2 radio-selected AGN
obtained by pinpointing their location within the cosmic web of
galaxies as identified in the COSMOS field by Darvish et al.
(2017ApJ...837...16D 2017ApJ...837...16D, Cat. J/ApJ/837/16).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 91 863 Properties of the considered sample
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See also:
J/A+A/532/A90 : PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011)
J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)
J/ApJ/837/16 : Cosmic web of galaxies in the COSMOS field (Darvish+, 2017)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID ID from Darvish et al.,
2017ApJ...837...16D 2017ApJ...837...16D, Cat. J/ApJ/837/16
8- 15 F8.4 deg RAdeg Right ascension (J2000) (1)
17- 22 F6.4 deg DEdeg Declination (J2000) (1)
24- 28 F5.2 mJy F1.4GHz 1.4GHz flux (1)
30- 34 F5.2 [W/Hz/sr] logP1.4GHz Log10 1.4GHz luminosity
36- 38 A3 --- Type Type (AGN or SF) (2)
40- 43 F4.2 --- zph Photometric redshift (3)
45- 49 F5.2 Msun M* Stellar mass (3)
51- 58 A8 --- Env Environmental properties, Cosmic Web
Environment (4)
61- 70 A10 --- Pos Environmental properties, Galaxy type (4)
71- 76 F6.2 uJy F100um ?=- 100um flux (5)
78- 83 F6.2 uJy F160um ?=- 160um flux (5)
85- 87 A3 --- MIR [yes no] yes if source also AGN
in the MIR (2)
89- 91 A3 --- Xray [yes no] yes if the source also AGN
in the X-ray (2)
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Note (1): from Bondi et al. (2008ApJ...681.1129B 2008ApJ...681.1129B).
Note (2): from Magliocchetti et al. (2018MNRAS.473.2493M 2018MNRAS.473.2493M)
Note (3): from Laigle et al. (2016ApJS..224...24L 2016ApJS..224...24L, Cat. J/ApJS/224/24)
Note (4): from Darvish et al. (2017ApJ...837...16D 2017ApJ...837...16D, Cat. J/ApJ/837/16)
Note (5): from Lutz et al. (2011A&A...532A..90L 2011A&A...532A..90L, Cat. J/A+A/532/A90)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Sep-2021