VizieR Online Data Catalog: Origin of nuclear activity in low-power radio galaxies (Lin+, 2018)

The radio galaxy (RG) sample used in this section is based on two large RG catalogs: one is that of Lin et al. (2010, J/ApJ/723/1119), which covers the footprint of SDSS DR6 (Cat. III/255) and is available in Table 7, the other is taken from Best & Heckman (2012, J/MNRAS/421/1569), covering DR7 (Cat. II/294). Both studies cross match SDSS galaxy samples with 1.4 GHz radio source catalogs from NVSS and FIRST, largely following the methodology outlined in Best et al. (2005, J/MNRAS/362/9). To ensure the radio sources are powered (primarily) by an active nucleus, a combination of diagnostics is used to select RGs, including the BPT diagram (Baldwin et al. 1981PASP...93....5B), the distributions of objects in the 4000 Å versus radio power, and Hα versus radio power planes (see modifications discussed in Best & Heckman 2012, J/MNRAS/421/1569). To investigate the effect of the ICM on triggering of the radio activity, we make use of the X-ray measurements in the Archive of Chandra Cluster Entropy Profile Tables (ACCEPT) database (Cavagnolo et al. 2009, J/ApJS/182/12), which is an attempt to homogeneously analyze Chandra observations of about 230 galaxy clusters. We can thus use the SDSS (imaging and spectroscopic) data to identify cluster members and study the correlations between the radio activity and the local ICM properties. We have run our RG finding algorithm on the ACCEPT-SDSS clusters, with a flux limit of 1 mJy that is suitable for FIRST and have visually inspected all potential optical-radio matches to finalize our cluster RG sample (see Table 8).

(3 data files).