J/ApJS/247/71 Large-scale environment of radio galaxies. II. (Massaro+, 2020)
Deciphering the large-scale environment of radio galaxies in the local universe.
II. A statistical analysis of environmental properties.
Massaro F., Capetti A., Paggi A., Baldi R.D., Tramacere A., Pillitteri I.,
Campana R., Jimenez-Gallardo A., Missaglia V.
<Astrophys. J. Suppl. Ser., 247, 71 (2020)>
=2020ApJS..247...71M 2020ApJS..247...71M
ADC_Keywords: Galaxies, radio; Redshifts; Velocity dispersion; Clusters, galaxy;
Optical; X-ray sources
Keywords: Relativistic jets; Astrostatistics; Active galaxies; Radio galaxies;
Galaxy clusters
Abstract:
In our previous analysis we investigated the large-scale environment
of two samples of radio galaxies (RGs) in the local universe (i.e.,
with redshifts zsrc≤0.15), classified as FR I and FR II on the
basis of their radio morphology. The analysis was carried out using
(i) extremely homogeneous catalogs and (ii) a new method, known as
cosmological overdensity, to investigate their large-scale
environments. We concluded that, independently of the shape of their
radio extended structure, RGs inhabit galaxy-rich large-scale
environments with similar characteristics and richness. In the present
work, we first highlight additional advantages of our procedure, which
does not suffer cosmological biases and/or artifacts, and then we
carry out an additional statistical test to strengthen our previous
results. We also investigate properties of RG environments using those
of the cosmological neighbors. We find that large-scale environments
of both FR Is and FR IIs are remarkably similar and independent of the
properties of central RG. Finally, we highlight the importance of
comparing radio sources in the same redshift bins to obtain a complete
overview of their large-scale environments.
Description:
We selected two radio galaxy catalogs to carry out our analysis
starting from the radio-loud sample of Best & Heckman
(2012, J/MNRAS/421/1569).
The first catalog is the combination of FRICAT and sFRICAT both
described in Capetti+ (2017, J/A+A/598/A49). This combines radio
galaxies at redshift zsrc≤0.15, all hosted in red early-type
galaxies and spectroscopically classified low excitation radio
galaxies (LERGs) for a total of 209 radio sources.
The second sample is the FRIICAT (Capetti+ 2017, J/A+A/601/A81),
composed of 105 edge-brightened radio sources (FRII type) within the
same redshift range of the previous catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 125 324 Environmental parameters for the FRICAT
(Capetti+ 2017, J/A+A/598/A49) and
the FRIICAT (Capetti+ 2017, J/A+A/601/A81)
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See also:
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
J/MNRAS/301/881 : The ROSAT brightest cluster sample - I. (Ebeling+, 1998)
J/MNRAS/348/866 : 2dFGRS Percolation-Inferred Galaxy Group (Eke+, 2004)
J/ApJS/155/257 : NBC Quasar Candidate Catalog (Richards+, 2004)
J/ApJS/167/1 : Galaxy groups and clusters from SDSS (Berlind+, 2006)
J/MNRAS/396/223 : QSO candidates selection in VO era (D'Abrusco+, 2009)
J/A+A/514/A102 : SDSS DR7 groups of galaxies (Tago+, 2010)
J/AJ/141/88 : Galaxy cluster environments of radio sources (Wing+, 2011)
J/MNRAS/421/1569 : Properties of 18286 SDSS radio galaxies (Best+, 2012)
J/MNRAS/423/1024 : XCS-DR1 Cluster Catalogue (Mehrtens+, 2012)
J/A+A/540/A106 : SDSS-DR8 groups and clusters of galaxies (Tempel+, 2012)
J/MNRAS/430/3086 : CoNFIG AGN sample (Gendre+, 2013)
J/ApJS/209/10 : UGSs. V. kernel approach (Massaro+, 2013)
J/ApJ/767/15 : Hectospec Cluster Survey (HeCS) (Rines+, 2013)
J/MNRAS/440/269 : X-ray survey of the 2Jy sample. I. (Mingo+, 2014)
J/MNRAS/453/2682 : Observation & modelling for radio-loud AGN (Ineson+, 2015)
J/A+A/598/A49 : FRICAT. FIRST catalog of FRI radio galaxies (Capetti+, 2017)
J/A+A/601/A81 : FIRST catalog of FR II radio galaxies (Capetti+, 2017)
J/MNRAS/466/4346 : Properties of extended radio galaxies (Miraghaei+, 2017)
J/A+A/609/A1 : FR0CAT. a FIRST cat. of FR 0 radio galaxies (Baldi+, 2018)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS SDSS identifier (JHHMMSS.ss+DDMMSS.s)
25- 28 A4 --- Class Radio class (1)
30- 34 F5.3 --- z [0.017/0.15] Spectroscopic redshift of source
36- 44 E9.2 --- Deltaz [-0.005/0.005] Absolute redshift difference (2)
46- 52 F7.2 kpc dproj [0/1991] Physical distance (3)
54- 57 F4.1 --- N500cn [0/34] Number of cosmolocigal
neighbors <500kpc (3)
59- 62 F4.1 --- N1000cn [0/70] Number of cosmolocigal
neighbors <1000kpc (3)
64- 68 F5.1 --- N2000cn [0/164] Number of cosmolocigal
neighbors <2000kpc (3)
70- 74 F5.3 --- zetacn [0/1] The concentration parameter
76- 80 F5.3 --- zcn [0/0.2] Average redshift (4)
82- 89 E8.2 --- sigmaz [0/0.004] Standard deviation of
z distribution (4)
91- 97 F7.2 kpc dcnproj [0/1891] Physical distance (3)(4)
99-105 F7.2 kpc dcnm [0/1891] Average distance (4)
107-112 F6.2 km/s sigmav [0/915] Velocity dispersion (4)
114-118 F5.2 Msun Menv [10/13.2]? Environmental mass from velocity
dispersion (5)
120-125 F6.2 mW/m2 Fx [-16/-10.6]? X-ray flux estimated from
velocity dispersion; in erg/s/cm2 units
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Note (1): To distinguish between source belonging to the FRICAT and the FRIICAT.
Note (2): Of the redshift difference between the radio galaxy (RG) and
the closest galaxy cluster in the T12 (Tempel+, 2012, J/A+A/540/A106)
catalog.
Note (3): Computed at the z of the central radio galaxy.
Note (4): Of the cosmological neighbors in 2Mpc.
Note (5): The mass includes the galaxies, intergalactic medium, and
the dark matter content.
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History:
From electronic version of the journal
References:
Massaro et al. Paper I. 2019ApJS..240...20M 2019ApJS..240...20M
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Jun-2020