J/A+A/630/A83ivo://CDS.VizieR/J/A+A/630/A83doi:10.26093/cds/vizier.36300083CDSZajacek M.Busch G.M.Valencia-S.Eckart A.Britzen S.Fuhrmann L.,Schneeloch J.Fazeli N.Harrington K.C.Zensus J.A.2019-09-24T07:48:12Z2019-09-24T08:47:24ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleiradio-sourcesA detailed understanding of how the activity of a galactic nucleus regulates the growth of its host is still missing. To understand the activity and the types of accretion of supermassive black holes in different hosts, it is essential to study radio-optical properties of a large sample of extragalactic sources. In particular, we aim at studying the radio spectral index trends across the optical emission line diagnostic diagrams to search for potential (anti)correlations. To this goal, we combine flux densities from the radio FIRST survey at 1.4GHz (with the flux density range 10mJy<=F1.4<=1000mJy for 209 SDSS sources at intermediate redshift (0.04<=z<=0.4) with the Effelsberg radiotelescope measurements at 4.85GHz and 10.45GHz. The information about the optical emission-line ratios is obtained from the SDSS-DR7 catalogue. Using the Effelsberg data, we were able to infer the two-point radio spectral index distributions for star-forming galaxies, composite galaxies (with a combined contribution to the line emission from the star-formation and AGN activity), Seyferts, and low ionization narrow emission region (LINER) galaxies. While studying the distribution of steep, flat, and inverted sources across optical diagnostic diagrams, we found three distinct classes of radio emitters for our sample: (i) sources with steep radio index, high ionization ratio and high radio loudness, (ii) sources with flat radio index, lower ionization ratio and intermediate radio loudness, (iii) sources with inverted radio index, low ionization ratio and low radio loudness. The classes (i), (ii), (iii) cluster mainly along the transition from Seyfert to LINER sources in the BPT diagram. We interpret these groups as a result of the recurrent nuclear-jet activity.2019A&A...630A..83Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/630/A83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/630/A83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/630/A83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/630/A83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/630/A83https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/630/A83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/630/A83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/630/A83/tablea1 (New measurements at 4.85 and 10.45GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/630/A83/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/630/A83/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/630/A83/tablea1?GETtext/xml+votable180.050000true37.92-1.16770.0055555555555555566/5567 5855 5979 5983 6010 6023 6093 6488 6496-6497 6534-6535 6538 6552 6571 6583 6654 7186 7188 7228 7237 7303 7320 7348 7365 7398 7412 8438 8485 8514 8552 8590 8618 8658 8900 8908 8947 8984 9033 9043 9107 9251 9295 9312 9357 9359 9437 9744 9770 9794 9810 9839 9855 9877 9883 9895 9956 10025 10115-10116 10152 10325 10367 10572 10644 10682 10739 11105 11114 11146 11254 11346 11355 11405 11908 17237 17493-17494 17514 17556 17559 17577 17601-17602 17761 18522 19050 190973.213643678408261e-24 6.924242574589622e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/630/A83?format=asciiRadiodefaultJ/A+A/630/A83/tablea1New measurements at 4.85 and 10.45GHzzSource redshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainF4.85Flux density at 4.85GHzmJyphot.flux.density;em.radio.3-6GHzfloate_F4.851-sigma error at 4.85GHzmJystat.errorfloatF10.45Flux density at 10.45GHzmJyphot.flux.density;em.radio.6-12GHzfloate_F10.451-sigma error at 10.45GHzmJystat.errorfloatTypeGalaxy spectral type (1)src.spTypechar