J/A+A/669/A32ivo://CDS.VizieR/J/A+A/669/A32doi:10.26093/cds/vizier.36690032CDSParaschos G.F.Mpisketzis V.Kim J.-Y.Witzel G.Krichbaum T.P.,Zensus J.A.Gurwell M.A.Laehteenmaeki A.Tornikoski M.Kiehlmann S.,Readhead A.C.S.2023-02-08T05:55:01Z2023-01-03T08:33:52ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiradio-sourcesinterferometrygamma-ray-astronomyTotal intensity variability light curves offer a unique insight into the ongoing debate about the launching mechanism of jets. For this work, we utilised the availability of radio and gamma-ray light curves over a few decades of the radio source 3C 84 (NGC 1275). We calculated the multi-band time-lags between the flares identified in the light curves via discrete cross- correlation and Gaussian process regression. We find that the jet particle and magnetic field energy densities are in equipartition (kr=1.08+/-0.18). The jet apex is located z_91.5GHz_=22-645Rs (2-20x10^-3^pc) upstream of the 3mm radio core; at that position, the magnetic field amplitude is B91.5GHz core =3-10G. Our results are in good agreement with earlier studies that utilised very-long-baseline interferometry. Furthermore, we investigated the temporal relation between the ejection of radio and gamma-ray flares. Our results are in favour of the gamma-ray emission being associated with the radio emission. We are able to tentatively connect the ejection of features identified at 43 and 86GHz to prominent gamma-ray flares. Finally, we computed the multiplicity parameter {lambda} and the Michel magnetisation {sigma}M, and find that they are consistent with a jet launched by the Blandford & Znajek (2007MNRAS.377L..49K) mechanism.2023A&A...669A..32Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/669/A32CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/622/A196 : GMVA 86GHz Stokes IQU images of 3C84 jet (Kim+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/669/A32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/669/A32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/669/A32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/669/A32https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/669/A32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/669/A32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/669/A32/alma (ALMA 91.5 GHz)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/669/A32/alma?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/669/A32/alma?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/669/A32/alma?GETtext/xml+votable180.050000true49.95066712541.51169602780.0055555555555555566/17019.939104355462015e-24 2.4516457410139638e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/669/A32?format=asciiGamma-rayRadiodefaultJ/A+A/669/A32/umraoUMRAO 4.8, 8.0 & 14.8 GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.dateObservation datetime.epoch;obsnullableFreqFrequency (4.8, 8.0 or 14.5)GHzem.freqfloatUTU.T.time.epochfloatSFlux density at FreqJyphot.flux.density;em.radiofloate_SError on Flux density at FreqJystat.errorfloatN[1/8] Nmeta.numberintJ/A+A/669/A32/ovroOVRO 15 GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[54473.03/58871.3] MJD observation datedtime.epochdoubleFlux[13.78/41.93] Flux at 15GHzJyphot.flux.density;em.radio.12-30GHzdoublee_Flux[0.11/1.68] Flux at 15GHz errorJystat.error;phot.fluxdoubleJ/A+A/669/A32/mroMRO 37 GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDate[1979.81/2021.75] Time (Decimal year)yrtime.epochdoubleTimeTimetime.epochcharSourceSourcemeta.id;meta.maincharFreq[37] FrequencyGHzem.freqintCatalogCatalog (Kurp or KURP-GIX)meta.id;meta.datasetcharFlux[7.13/60.53] Flux at 37GHzJyphot.flux.density;em.mm.30-50GHzfloate_Flux[0.1/2.03] Error on Flux at 37GHzJystat.error;phot.fluxfloatJ/A+A/669/A32/almaALMA 91.5 GHzCatCatalogue namemeta.id;meta.tablecharMaxUV? UV Max (in klambda unit)meta.codefloatnullableBandBand (ALMA-Band 3, ALMA-Band 6 or ALMA-Band 7)instr.bandpasscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.dateObservation datetime.epoch;obscharRAJ2000Right ascension (J2000)pos.eq.ra;meta.maine_RAJ2000[0.0/0.01] Right ascension uncertaintyarcsecstat.error;pos.eq.radoubleDEJ2000Declination (J2000)pos.eq.dec;meta.maine_DEJ2000[0.0/0.01] Declination uncertaintyarcsecstat.error;pos.eq.decdoubleFlux[3.8/26.1] Flux density at BandJyphot.fluxfloate_Flux[0.09/2.43] Flux density at Band uncertaintyJystat.error;phot.fluxdoubleFreq[91460000000.0/349500000000.0] FrequencyHzem.freqdoubleNamesNames (separated by |)meta.codecharJ/A+A/669/A32/smaSMA 230 & 345 GHzrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBandBand (1mm or 850)instr.bandpasscharObs.dateUT observation datestime.epoch;obsnullableInst[SMA] Instrumentmeta.id;instrcharFreq[205.99/362.48] FrequencyGHzem.freqfloatFlux[0.08/17.12] Flux at FreqJyphot.flux.density;em.radiofloate_Flux[0.1/1.26] Error on Flux at FreqJystat.error;phot.fluxfloatPIP.I. for fluxobs.observercharJ/A+A/669/A32/gammaFERMI-LAT gamma-raysMINUITMINUIT Return Codemeta.codeintAnalysisLogAnalysis Logstat.fit.paramcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate (UTC)time.epochnullableJD[2454687/2459559] Julian Datedtime.epochintMETMission elapsed timetime.epochlongTSTotal durationstime.durationfloatl_PhFluxLimit flag on PhotonFluxmeta.code.errorcharPhFluxPhoton Flux in 0.1-100GeV bandph.cm**-2.s**-1phot.fluxdoublee_PhFlux? Error on PhFluxph.cm**-2.s**-1stat.errordoublenullablephIndex? Photon Indexspect.indexfloatnullableFitTol[0.0/0.01]? Fit Tolerancestat.fit.paramfloatnullable