J/A+A/609/A1 FR0CAT. a FIRST catalog of FR 0 radio galaxies (Baldi+, 2018)
FR0CAT: a FIRST catalog of FR 0 radio galaxies.
Baldi R.D., Capetti A., Massaro F.
<Astron. Astrophys., 609, A1 (2018)>
=2018A&A...609A...1B 2018A&A...609A...1B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Galaxies, radio
Keywords: galaxies: active - galaxies: jets
Abstract:
With the aim of exploring the properties of the class of FR 0 radio
galaxies, we selected a sample of 108 compact radio sources, called
FR0CAT, by combining observations from the NVSS, FIRST, and SDSS
surveys. We included in the catalog sources with redshift ≤0.05, with
a radio size ≤5kpc, and with an optical spectrum characteristic of
low-excitation galaxies. Their radio luminosities at 1.4GHz are in the
range 1038≤νL1.4≤1040erg/s. The FR0CAT hosts are mostly
(86%) luminous (-21≥Mr≥-23) red early-type galaxies with black
hole masses 108≤MBH≤109M☉. These properties are similar
to those seen for the hosts of FR I radio galaxies, but they are on
average a factor ∼1.6 less massive. The number density of FR0CAT
sources is ∼5 times higher than that of FR Is, and thus they represent
the dominant population of radio sources in the local Universe.
Different scenarios are considered to account for the smaller sizes
and larger abundance of FR 0s with respect to FR Is. An age-size
scenario that considers FR 0s as young radio galaxies that will all
eventually evolve into extended radio sources cannot be reconciled
with the large space density of FR 0s. However, the radio activity
recurrence, with the duration of the active phase covering a wide
range of values and with short active periods strongly favored with
respect to longer ones, might account for their large density number.
Alternatively, the jet properties of FR 0s might be intrinsically
different from those of the FR Is, the former class having lower bulk
Lorentz factors, possibly due to lower black hole spins. Our study
indicates that FR 0s and FR I/IIs can be interpreted as two extremes
of a continuous population of radio sources that is characterized by a
broad distribution of sizes and luminosities of their extended radio
emission, but shares a single class of host galaxies.
Description:
We explored the properties of compact radio sources associated with
low-redshift (z<0.05) galaxies. We selected these objects by
cross-matching the SDSS, FIRST, and NVSS catalogs with a radio flux
>5mJy, a radio size ≲5kpc, and an LEG optical spectrum. We named
these sources FR 0s, in contrast to the other extended FR classes, and
formed the FR0CAT catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 80 108 Properties of the FR 0s candidates sample
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/92 : FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
II/294 : SDSS Photometric Catalog Release 7 (Adelman-McCarthy+, 2009)
J/MNRAS/421/1569 : Properties of 18286 SDSS radio galaxies (Best+, 2012)
J/A+A/598/A49 : FRICAT FIRST catalog of FRI radio galaxies (Capetti+, 2017)
J/A+A/601/A81 : FRIICAT FIRST catalog of FRII radio galaxies (Capetti+ 2017)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
6- 24 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s)
26- 30 F5.3 --- z Redshift
32- 37 F6.1 mJy F1.4GHz NVSS 1.4 GHz flux density
39- 43 F5.1 10-20W/m2 F[OIII] ? [OIII] flux in 10-17erg/cm2/s
45- 50 F6.3 mag rmag SDSS DR7 r band AB magnitude
52- 55 F4.2 --- Dn Dn(4000) index
57- 59 I3 km/s sigma* Stellar velocity dispersion
61- 64 F4.2 --- Cr Concentration index
66- 70 F5.2 [10-7W] logLr logarithm of the radio luminosity
72- 76 F5.2 [10-7W] logL[OIII] logarithm of the [OIII] line luminosity
78- 80 F3.1 [Msun] logMBH logarithm of the black hole mass
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Sep-2018