J/A+A/409/115ivo://CDS.VizieR/J/A+A/409/115doi:10.26093/cds/vizier.34090115CDSNagar N.M.Wilson A.S.Falcke H.Veilleux S.Maiolino R.2003-11-13T19:57:02Z2003-11-13T20:56:54ZCDS support team

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

cds-question@unistra.frsurveysgalaxiesinfrared-sourcesactive-galactic-nucleiradio-sourcesThis paper presents the results of a high resolution radio imaging survey of 83 of the 118 ultraluminous infrared galaxies (ULIRGs) in the IRAS 1Jy ULIRG sample (Kim & Sanders, 1998ApJS..119...41K, Veilleux et al., 2002, Cat. <J/ApJS/143/315>). We have observed these ULIRGs at 15-GHz with the Very Large Array (VLA). We find that ~75% of Seyferts (both type 1 and 2) and LINERs have radio nuclei which are compact at our 150mas resolution. The detection rate of HII nuclei is significantly lower (32%); the detections among these are preferentially HII+LINER/Seyfert composite nuclei. Among ULIRGs with multiple optical or near-IR nuclei our observations detected only one (or no) nucleus; in these the radio detection is typically towards the brightest near-IR nucleus. The compactness of the radio sources, the higher detection rates in AGN-type nuclei than HII nuclei, the preferential detection of nuclei with unresolved point sources in the near-IR, the low soft X-ray to nuclear radio luminosity ratio (arguing against thermal emission powering the radio nuclei), and the lack of correlation between radio power and H{alpha} luminosity, all support an origin of the detected radio nuclei in AGN related activity. This result is especially interesting for LINER ULIRGs for which signatures of AGNs have often been ambiguous in other wavebands. Such a high incidence of AGN would provide, for the first time, a large sample in which to study the interplay between AGN, starbursts, and galaxy mergers.2003A&A...409..115Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/409/115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/156 : IRAS Faint Source Catalog, |b|>10, Version 2.0 (Moshir+ 1989)J/ApJS/143/315 : IRAS 1Jy sample of ultraluminous galaxies II. (Veilleux+ 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/409/115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/409/115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/409/115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/409/115https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/409/115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/409/115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/409/115/table1 (New 2cm VLA observations of the IRAS 1Jy ULIRG sample.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/409/115/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/409/115/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/409/115/table1?GETtext/xml+votable180.050000true2.93030417-7.368705560.0055555555555555566/4113 4689 5116 5213 5560 5758 7777 8133 8410 8637 8673 9998 10086 10134 10187 10317 11101 11206 11410 11462 11623 17263-17264 17606 17819 18813 18919 19628 20211 21142 23148 26087 26103 26292 26298 26443 26491 27502 27555 27617 27873 27892 28074 28212 31327 48561 48759https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/409/115?format=asciiInfraredRadiodefaultJ/A+A/409/115/table1New 2cm VLA observations of the IRAS 1Jy ULIRG sample.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFSCIRAS FSC name (FHHMMm+DDMM or ZHHMMm+DDMM)meta.id;meta.maincharn_FSCMultiplicity index on FSC (1)meta.notecharATypeNuclear activity type (2)src.classcharRAJ2000? 15GHz radio right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? 15GHz radio declination (J2000)pos.eq.dec;meta.mainnullableDelta? Offset between the 15GHz radio position and the position of the near-IR nucleus as listed in KVS (Veilleux et al., 2002, Cat. <J/ApJS/143/315>)arcsecpos.angDistancefloatnullableSpeak? Peak flux density at 15GHz (in mJy/beam)mJyphot.flux.density;em.radio.12-30GHzfloatnullablel_StotLimit flag on Stotmeta.code.errorcharStotTotal flux at 15GHzmJyphot.flux.density;em.radio.12-30GHzfloatzRedshift of the ULIRGsrc.redshiftfloatl_logPcoreLimit flag on logPcoremeta.code.errorcharlogPcoreCore radio power at 15GHzlog(W.Hz**-1)phot.flux.density;em.radio.12-30GHzfloatComComments (3)meta.notechar