J/A+A/698/A210ivo://CDS.VizieR/J/A+A/698/A210doi:10.26093/cds/vizier/bc-nt/lcbaCDSToscano T.Molina S.N.Gomez J.L.Zeng A.-L.Dahale R.Cho I.,Moriyama K.Wielgus M.Fuentes A.Foschi M.Roeder J.Myserlis I.,Angelakis E.Zensus A.2026-02-27T20:00:51Z2025-06-17T08:40:50ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsvery-long-baseline-interferometrypolarimetryWe present a study on rotation measure (RM) of the quasar 3C 273. This analysis aims to discern the magnetic field structure and its temporal evolution. The quasar 3C 273 is one of the most studied active galactic nuclei due to its high brightness, strong polarization, and proximity, which enables resolving the transverse structure of its jet in detail. We used polarized data from 2014, collected at six frequencies (5, 8, 15, 22, 43, 86 GHz) with the Very Long Baseline Array, to produce total and linear polarization intensity images, as well as RM maps. Our analysis reveals a well-defined transverse RM gradient across the jet, indicating a helical, ordered magnetic field that threads the jet and likely contributes to its collimation. Furthermore, we identified temporal variations in the RM magnitude when compared with prior observations. These temporal variations show that the environment around the jet is dynamic, with changes in the density and magnetic field strength of the sheath that are possibly caused by interactions with the surrounding medium.2025A&A...698A.210Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/698/A210CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/392/1181 : BV(RI)c photometry of 3C 273 (Dai+, 2009)J/ApJS/213/26 : Optical light curves of PHL 1811 and 3C 273 (Fan+, 2014)J/A+A/576/A122 : 3C 273 high energy spectrum (Esposito+, 2015)J/A+A/601/A35 : High-fidelity VLA imaging of 3C 273 (Perley+, 2017)J/A+A/604/A111 : 22GHz image of 3C 273 (Bruni+, 2017)J/ApJS/229/21 : VRI monitoring of the QSO 3C 273 in 2005-2016 (Xiong+, 2017)J/ApJ/876/49 : 3C 273 10yr reverberation mapping campaign (Zhang+, 2019)J/ApJ/880/155 : RI photometry of blazars S5 0716+714 and 3C 273 (Liu+, 2019)J/A+A/636/A62 : Light curves of 3C273 during 2015-2019 (Kim+, 2020)J/AJ/159/259 : Quasar 3C 273 opt-NIR light curve (Sobrino Figaredo+, 2020)J/ApJ/897/18 : Swift UVOT observation of radio quasar 3C 273 (Li+, 2020)J/A+A/658/A8 : Resolved jet of 3C 273 at 150MHz (Harwood+, 2022)J/A+A/683/L5 : FITS images of 3C 273 host galaxy (Ren+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/698/A210https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/698/A210http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/698/A210https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/698/A210https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/698/A210http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/698/A210GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/698/A210/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/698/A210/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/698/A210/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/698/A210/list?GETtext/xml+votable180.050000true187.2778752.05236110.0055555555555555566/26292https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/698/A210?format=asciiRadiodefaultJ/A+A/698/A210/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Simbad Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination (J2000)pos.eq.dec;meta.mainObs.dateObservation date'Y:M:D'time.epoch;obsnullableFreqObserved frequencyHzem.freqdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar