J/ApJS/247/57ivo://CDS.VizieR/J/ApJS/247/57doi:10.26093/cds/vizier.22470057CDSCheng X.-P.An T.Frey S.Hong X.-Y.He X.Kellermann K.I.,Lister M.L.Lao B.-Q.Li X.-F.Mohan P.Yang J.Wu X.-C.Zhang Z.-L.,Zhang Y.-K.Zhao W.2020-10-07T13:00:55Z2020-07-20T09:21:07ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiradio-sourcesinterferometryquasarsWe present the results from the 43GHz Very Long Baseline Array (VLBA) observations of 124 compact radio-loud active galactic nuclei (AGNs) that were conducted between 2014 November and 2016 May. The typical dimensions of the restoring beam in each image are about 0.5masx0.2mas. The highest resolution of 0.2mas corresponds to a physical size of 0.02pc for the lowest redshift source in the sample. The 43GHz very long baseline interferometry (VLBI) images of 97 AGNs are presented for the first time. We study the source compactness on milliarcsecond and submilliarcsecond scales, and suggest that 95 sources in our sample are suitable for future space VLBI observations. By analyzing our data supplemented with other VLBA AGN surveys from the literature, we find that the core brightness temperature increases with increasing frequency below a break frequency ~7GHz, and decreases between ~7 and 240GHz but increases again above 240GHz in the rest frame of the sources. This indicates that the synchrotron opacity changes from optically thick to thin. We also find a strong statistical correlation between radio and {gamma}-ray flux densities. Our correlation is tighter than those in the literature derived from lower-frequency VLBI data, suggesting that the {gamma}-ray emission is produced more cospatially with the 43GHz VLBA core emission. This correlation can also be extrapolated to the unbeamed AGN population, implying that a universal {gamma}-ray production mechanism might be at work for all types of AGNs.2020ApJS..247...57Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/247/57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)J/MNRAS/204/151 : Bright radio sources at 178 MHz (3CRR) (Laing+ 1983)J/ApJS/98/1 : First Caltech-Jodrell Bank VLBI Survey. I. (Polatidis+ 1995)J/A+AS/131/303 : GHz-Peaked-Spectrum radio sources (Stanghellini+ 1998)J/A+A/363/887 : High frequency peakers. I. Bright sample (Dallacasa+, 2000)J/ApJS/128/17 : VLBA obs. of radio reference frame sources. III. (Fey+, 2000)J/ApJS/131/95 : VSOP 5 GHz continuum survey (Fomalont+, 2000)J/ApJS/141/13 : VLBA calibrator survey: VCS1 catalog (Beasley+, 2002)J/AJ/126/2562 : Second VLBA calibrator survey: VCS2 (Fomalont+, 2003)J/PASJ/55/351 : ATCA observations of 202 compact radio sources (Tingay+, 2003)J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004)J/ApJ/616/110 : VSOP 5GHz AGN Survey. IV (Horiuchi+, 2004)J/ApJS/155/33 : VSOP 5 GHz AGN Survey. III (Scott+, 2004)J/AJ/130/2473 : Fine-scale structure in 250 sources at 15GHz (Kovalev+, 2005)J/AJ/129/1163 : Third VLBA calibrator survey: VCS3 (Petrov+, 2005)J/A+A/450/959 : VLBA images of High Frequency Peakers (Orienti+, 2006)J/A+A/476/L17 : 86 and 43GHz observations of NRAO 150 (Agudo+, 2007)J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007)J/ApJ/658/203 : VLBA imaging and polarimetry survey at 5GHz (Helmboldt+, 2007)J/ApJS/175/314 : VSOP 5GHz AGN survey V. (Dodson+, 2008)J/AJ/136/159 : Global 86GHz VLBI survey of compact radio sources (Lee+, 2008)J/AJ/138/1874 : MOJAVE. VI. Kinematic analysis of blazar jets (Lister+, 2009)J/ApJS/189/1 : A 3.5mm polarimetric survey of radio-loud AGNs (Agudo+, 2010)J/AJ/139/1713 : Celestial Reference Frame at 24 and 43GHz. II (Charlot+, 2010)J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010)J/AJ/139/1695 : Celestial Reference Frame at 24 and 43 GHz (Lanyi+, 2010)J/ApJ/741/30 : Radio/{gamma}-ray correlation in AGN (Ackermann+, 2011)J/A+A/535/A69 : AGN Fermi/LAT {gamma}-ray and 37GHz fluxes (Nieppola+, 2011)J/ApJS/194/29 : Observations of blazars at 15GHz (Richards+, 2011)J/ApJ/758/84 : Relativistic jets in RRFID database. II. 10yr (Piner+, 2012)J/A+A/544/A34 : Bright AGN VLBI imaging study at 2 and 8GHz (Pushkarev+, 2012)J/AJ/146/120 : MOJAVE. X. Parsec-scale kinematics of AGNs (Lister+, 2013)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)J/ApJ/810/14 : Third catalog of LAT-detected AGNs (3LAC) (Ackermann+, 2015)J/AJ/150/58 : VLBI ICRF2 (Fey+, 2015)J/ApJS/226/20 : X-ray, opt. & radio SEDs of Fermi blazars (Fan+, 2016)J/AJ/152/12 : MOJAVE. XIII. New 15GHz obs. on 1994-2013 (Lister+, 2016)J/ApJ/846/98 : Jet kinematics of blazars at 43GHz with VLBA (Jorstad+, 2017)J/A+A/622/A92 : Ultracompact radio sources at 86GHz (Nair+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/247/57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/247/57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/247/57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/247/57https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/247/57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/247/57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/247/57/sources (General source properties (Table 1) and image parameters (Table 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/247/57/sources?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/247/57/sources?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/247/57/sources?GETtext/xml+votable180.050000true12.7842075833-6.83395252780.0055555555555555566/110 180 438 514 532 700 1154 1622 1702 3309 3330 3675 4285 5597 5693 6252 6496 6548 6963 6984 7389 7911 8299 8615 8858 9618 9676 9998 10006 10249 10474 10548 11067 11640 11715 11845 12241 12475 12547 12604 12619 13230 13320 13352 13410 13582 14608 15023 15036 15429 15916 15936 16027 16049 16059 16281 17184 17186 17188 17414 17541 17909 17927 18005 18035 18214 18506 18624 18669 18718 18907 19101 19370 19609 19622 20888 20935 21358 21758 21768 21924 21935 21960 22363 22375 22658 22659 23691 23882 24123 25016 25196 25255 25256 25501 25818 26115 26303 27310 27417 27423 27765 28339 29218 30928 31190 31391 31399 31430 31451 31559 31664 34675 36554 40344 40730 40762 44805 48123 48595 48610 48798 48878 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/247/57?format=asciiRadiodefaultJ/ApJS/247/57/sourcesGeneral source properties (Table 1) and image parameters (Table 3)SimbadNameSimbad column added by the CDSmeta.idcharONameSource aliasmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNcNumber of components for this source (link to Table 4)meta.numberintnullableIDIdentifier (HHMM+DDMM; B1950)meta.id;meta.maincharprimarySet[BC] Observing session (G1)meta.codecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainz[0.004/3.3]? Spectroscopic redshiftsrc.redshiftfloatnullableClassOptical classification (1)meta.code.classcharNote[NY] Source comments (see notes.dat file)meta.notecharSGam[4/401]? Fermi-LAT 100MeV-300GeV flux (from Acero+ 2015, J/ApJS/218/23)1e-10ph.cm**-2.s**-1phot.flux.density;em.gamma.hardintnullableDateObservation datetime.epoch;obsnullableBmaj[0.39/0.94] FWHM of restoring beam major axismasphys.angSize;instr.beamfloatBmin[0.14/0.31] FWHM of restoring beam minor axismasphys.angSize;instr.beamfloatBPA[-30/40.7] Position angle of major axis measured from north through eastdegpos.posAngfloatStot[0.1/3] Integrated flux densityJyphot.flux.density;em.mm.30-50GHzfloatSpeak[0.07/2.8] Peak specific intensityJy/beamphot.flux.density;em.mm.30-50GHzfloatsigma[0.1/2.7] Off-source rms noise in clean imagemJy/beamstat.stdev;instr.det.noise;obs.imagefloatSS[0.1/2.9] Shortest baseline correlated flux densityJyphot.flux.density;em.mm.30-50GHzfloatBS[17/85] Shortest baseline length in million wavelengths unitsinstr.baselineintSL[0.04/2.9] Longest baseline correlated flux densityJyphot.flux.density;em.mm.30-50GHzfloatBL[204/540] Longest baseline length in million wavelengths unitsmeta.unit;em.wlintNEDNED column added by the CDSmeta.ref.urlcharJ/ApJS/247/57/table4Model fit parameters of sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentifier (HHMM+DDMM; B1950)meta.id;meta.maincharSet[BC] Observing session (G1)meta.codecharm_IDComponent identifiermeta.code.multipcharStot[0.004/2.9] Fitted Gaussian model component integrated flux densityJyphot.flux.density;em.mm.30-50GHzfloatSpeak[0.001/2.8] Peak intensityJy/beamphot.flux.density;em.mm.30-50GHzfloatR[0.1/7.1]? Radial distance from the coremasphys.angSizefloatnullablePA[-180/179]? Position angle with respect to the coredegpos.posAngfloatnullablel_dLimit flag on dmeta.code.errorchard[0.01/1.9] Component sizemasphys.angSizefloatl_TbLimit flag on Tbmeta.code.errorcharTb[0.04/254.4]? Core brightness temperature1e+10Kphys.temperaturefloatnullableJ/ApJS/247/57/notesNotesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIAU identifier (HHMM+DDMM; B1950)meta.id;meta.maincharONameOther namemeta.idcharNoteText of the notemeta.note