J/MNRAS/495/3943ivo://CDS.VizieR/J/MNRAS/495/3943doi:10.26093/cds/vizier.74953943CDSChiaraluce E.Panessa F.Bruni G.Baldi R.D.Behar E.Vagnetti F.,Tombesi F.McHardy I.2024-10-18T20:16:21Z2023-11-15T18:15:23ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiseyfert-galaxiesinterferometryradio-sourcesx-ray-sourcesA thorough study of radio emission in active galactic nuclei (AGNs) is of fundamental importance to understand the physical mechanisms responsible for the emission and the interplay between accretion and ejection processes. High-frequency radio observations can target the nuclear contribution of smaller emitting regions and are less affected by absorption. We present JVLA 22 and 45GHz observations of 16 nearby (0.003=<z=<0.3) hard-X-ray-selected AGNs at the (sub)-kpc scale with tens {mu}Jy/beam sensitivity. We detected 15/16 sources, with flux densities ranging from hundreds {mu}Jy to tens Jy (specific luminosities from ~10^20^ to ~10^25^W/Hz at 22GHz). All detected sources host a compact core, with eight being core-dominated at either frequencies, the others exhibiting also extended structures. Spectral indices range from steep to flat/inverted. We interpret this evidence as either due to a core+jet system (6/15), a core accompanied by surrounding star formation (1/15), to a jet oriented close to the line of sight (3/15), to emission from a corona or the base of a jet (1/15), although there might be degeneracies between different processes. Four sources require more data to shed light on their nature. We conclude that, at these frequencies, extended, optically thin components are present together with the flat-spectrum core. The L_R_/L_X_~10^-5^ relation is roughly followed, indicating a possible contribution to radio emission from a hot corona. A weakly significant correlation between radio core (22 and 45GHz) and X-ray luminosities is discussed in the light of an accretion-ejection framework.2020MNRAS.495.3943Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/3943CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/186/1 : The 4th IBIS/ISGRI soft gamma-ray survey catalog (Bird+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/3943https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/3943http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/3943https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/3943https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/3943http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/3943GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/3943/tablea1 (Imaging results for the sources in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/3943/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3943/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3943/tablea1?GETtext/xml+votable180.050000true30.276916667-6.8158944440.0055555555555555566/1405 1701-1702 1841 3056 3309 7869 7921 10912 17525 17748 17754 24120 26393 27767https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/3943?format=asciiX-rayRadiodefaultJ/MNRAS/495/3943/tablea1Imaging results for the sources in our sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.maincharBandFrequency band (K, Q or Q-tapered)instr.bandpasscharsigimageImage noise rmsuJy/beamstat.stdev;instr.det.noise;obs.imageintCompComponent (only for the resolved sources)obs.fieldcharl_FtotalLimit flag on Ftotalmeta.code.errorcharFtotal? Integrated flux densitymJyphot.flux.density;em.radiodoublenullablee_Ftotal? Error on FtotalmJystat.errorfloatnullablel_FpeakLimit flag on Fpeakmeta.code.errorcharFpeak? Peak densitymJy/beamphot.flux.density;em.radiodoublenullablee_Fpeak? Error on FpeakmJy/beamstat.errorfloatnullablel_thetaMLimit flag on thetaMmeta.code.errorcharthetaM? Deconvolved FWHM major axis determined from an elliptical Gaussian fitmasphys.angSizefloatnullablee_thetaM? Error on thetaMmasstat.errorintnullablel_thetamLimit flag on thetammeta.code.errorcharthetam? Deconvolved FWHM minor axis determined from an elliptical Gaussian fitExplainmasphys.angSizefloatnullablee_thetam? Error on thetammasstat.errorintnullablePA? Position angledegpos.posAngfloatnullablee_PA? Error on PAdegstat.errorfloatnullableRAJ2000? Right ascension (J2000)pos.eq.ra;meta.mainnullablee_RAJ2000? Error on RAssstat.error;pos.eq.rafloatnullableDEJ2000? Declination (J2000)pos.eq.dec;meta.mainnullablee_DEJ2000? Error on DEsarcsecstat.error;pos.eq.decfloatnullablealpha? Spectral index calculated from the 22GHz and the 45GHz naturally weighted, tapered maps (1)spect.indexfloatnullablee_alpha? Error on alphastat.error;pos.eq.rafloatnullable