FRICAT - FIRST Catalog of FR I Radio Galaxies
This HEASARC table contains both the 219 radio galaxies in the main FRICAT sample listed in Table B.1 of the reference paper and the 14 radio galaxies in the additional sFRICAT sample listed in Table B.2 of the reference paper. To enable users to distinguish from which sample an entry has been taken, the HEASARC created a parameter galaxy_sample which is set to 'M' for galaxies from the main sample, and to 'S' for galaxies from the supplementary sFRICAT sample.
Throughout the paper, the authors adopted a cosmology with H0 = 67.8 km s-1 Mpc-1, OmegaM = 0.308, and OmegaLambda = 0.692 (Planck Collaboration XIII 2016).
FRICAT: A FIRST catalog of FR I radio galaxies Capetti, A., Massaro, F., Baldi, R.D. <Astron. Astrophys. 598, A49 (2017)> =2017A&A...598A..49C (SIMBAD/NED BibCode)
This HEASARC-created the parameter is set to 'M' for the 219 radio galaxies from the main sample, and to 'S' for the 14 radio galaxies from the supplementary sFRICAT sample.
The J2000.0 position-based SDSS source designation.
The Right Ascension of the radio galaxy in the selected equinox. This was given to an implicit precision of 0.01 seconds of time in the SDSS name.
The Declination of the radio galaxy in the selected equinox. This was given to an implicit precision of 0.1 arcseconds in the SDSS name.
The Galactic Longitude of the radio galaxy.
The Galactic Latitude of the radio galaxy.
The redshift of the radio galaxy, taken from Best & Heckman (2012, MNRAS, 421, 1569).
The NVSS 1.4-GHz flux density of the radio galaxy, taken from Best & Heckman (2012, MNRAS, 421, 1569).
The O [III] line flux of the radio galaxy, in erg s-1 cm-2, taken from the MPA-JHU DR7 release of spectrum measurements.
The SDSS DR7 r-band AB magnitude of the radio galaxy, corrected for Galactic extinction, taken from the MPA-JHU DR7 release of spectrum measurements.
The Dn(4000) spectroscopic index of the radio galaxy, taken from the MPA-JHU DR7 release of spectrum measurements. Dn(4000) is defined according to Balogh et al. (1999, ApJ, 527, 54) as the ratio between the flux density measured on the "red" side of the Ca II break (4000-4100 Angstroms) and that on the "blue" side (3850-3950 Angstroms). Low redshift (z < 0.1) red galaxies show Dn(4000) = 1.98 +/- 0.05, which is a value that decreases to 1.95 +/- 0.05 for 0.1 < z < 0.15 galaxies (Capetti & Raiteri 2015, A&A, 580, A73). The presence of young stars or of non-stellar emission reduces the Dn(4000) index. The authors estimate a median error of 0.03 for the Dn(4000) index values quoted herein.
The stellar velocity dispersion of the radio galaxy sigma*, in km s-1, taken from the MPA-JHU DR7 release of spectrum measurements. The authors estimate a median error of 9 km s-1 for the stellar dispersion values quoted herein.
The concentration index Cr of the radio galaxy taken directly from the SDSS database. The authors estimate a median error of 0.08 for the concentration index values quoted herein. The concentration index Cr is defined as the ratio of the radii including 90% and 50% of the light in the r band, respectively. Early-type galaxies (ETGs) have higher values of Cr than do late-type galaxies. Two thresholds have been suggested to define ETGs: a more conservative value at Cr >~ 2.86 and a more relaxed selection at Cr >~ 2.6. See Section 4.1 of the reference paper for more details.
The logarithm of the radio luminosity nu*L(nu) at 1.4 GHz, in erg s-1, calculated from the 1.4-GHz flux density and the redshift of the radio galaxy using the Planck-derived cosmological parameters listed in the Overview above.
The logarithm of the [O III] line luminosity, in erg s-1, calculated from the [O III] flux and the redshift of the radio galaxy using the Planck-derived cosmological parameters listed in the Overview above.
The logarithm of the black hole mass MBH in the radio galaxy, in solar masses. The black hole masses were estimated by the authors from the stellar velocity dispersion and the sigma* - MBH relation of Tremaine et al. (2002, ApJ, 574, 740). The errors in the MBH values are dominated by the spread of the relation used (rather than by the errors in the measurements of sigma*, resulting in an uncertainty of a factor of ~2.