J/MNRAS/495/3576ivo://CDS.VizieR/J/MNRAS/495/3576doi:10.26093/cds/vizier.74953576CDSKovalev Y.Y.Pushkarev A.B.Nokhrina E.E.Plavin A.V.Beskin V.S.,Chernoglazov A.V.Lister M.L.Savolainen T.2024-08-21T20:14:49Z2023-03-29T07:29:58ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsbl-lacertae-objectsradio-sourcesObservational studies of collimation in jets in active galactic nuclei (AGN) are a key to understanding their formation and acceleration processes. We have performed an automated search for jet shape transitions in a sample of 367 AGN using VLBA data at 15 and 1.4GHz. This search has found 10 out of 29 nearby jets at redshifts z<0.07 with a transition from a parabolic to conical shape, while the full analysed sample is dominated by distant AGN with a typical z~=1. The ten AGN are UGC 00773, NGC 1052, 3C 111, 3C 120, TXS 0815-094, Mrk 180, PKS 1514+00, NGC 6251, 3C 371, and BL Lac. We conclude that the geometry transition may be a common effect in AGN jets. It can be observed only when sufficient linear resolution is obtained. Supplementing these results with previously reported shape breaks in the nearby AGN 1H 0323+342 and M87, we estimate that the break occurs at 10^5^-10^6^ gravitational radii from the nucleus. We suggest that the jet shape transition happens when the bulk plasma kinetic energy flux becomes equal to the Poynting energy flux, while the ambient medium pressure is assumed to be governed by Bondi accretion. In general, the break point may not coincide with the Bondi radius. The observational data support our model predictions on the jet acceleration and properties of the break point.2020MNRAS.495.3576Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/3576CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/3576https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/3576http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/3576https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/3576https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/3576http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/3576GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/3576/table1 (Properties for 12 sources with a detected jet shape break from this study as well as Hada et al. (2018ApJ...860..141H, 1H 0323+342) and Asada & Nakamura (2012ApJ...745L..28A, M87))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/3576/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3576/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3576/table1?GETtext/xml+votable180.050000true4.940776773.45833830.005555555555555556Cone search capability for table J/MNRAS/495/3576/table3 (Derived best-fitting parameters of a single fit dependence d=alpha(r+r_0_)^k^ for 319 AGN, and their k-values)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/3576/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3576/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3576/table3?GETtext/xml+votable180.050000true2.26638426.47256750.0055555555555555566/532 579 674 700 893 911 968 1154 1263 1450 1509 1702 1782 2214 2228 2280 2397 2414 2710 2721 2836 3024 3096 3309 3820 3971 4054 4285 4572 4695 4770 4820 5154 5353 5423 5448 5458 5546 5597 5693 5767 5817 5848 6018 6164 6252 6368 6496 6507 6647 6751 6853 6948 6984 7181 7226 7371 7389 7548 7570 7653 7851 7896 8031 8199 8299 8466 8487 8515 8615 8717 8915 9075 9204 9248 9442 9460 9545 9612 9633 9676 9711 9714 9998 10006 10163 10249 10422 10548 11212 11430 11639-11640 11715 11845 12047 12241 12466 12475 12580 12604 12619 13156 13320 13352 13496 13582 13820 13927 14520 14641 14737 14842 15023 15067 15147 15969 16027 16049 16059 16093 16247 16281 16298 16301 17184 17364 17541 17579 17857 17927 18002 18005 18035 18037 18214 18271 18378 18457 18624 18661 18718 18907 19088 19101 19190 19271 19370 19398 19487 19523 19567 19593 19622 19831 20099 20224 20935 21121 21266 21358 21437 21564 21758 21768 21935 21960 21968 21972 22363 22375 22396 22501 22658 22917 22950 23015 23099 23121 23323 23416 23691 24084 24571 24845 25016 25196 25255 25302 25503 25630 25742 25818 25864 26083 26115 26131 26303 26491 26550 26614 27060 27310 27417 27423 27765 28315 28339 28454 28479 28492 28517 29017 29570 29675 29714 31190 31211 31391 31399 31451 31559 31663 31894 32311 32345 32660 32764 34675 35706 35786 36058 36151 36188 36554 36785 38763 40479 40527 40730 40874 42901 42980 44147 44247 44805 44908 45011 46963 48023 48595 48610 48846 48965 49071https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/3576?format=asciiRadiodefaultJ/MNRAS/495/3576/table1Properties for 12 sources with a detected jet shape break from this study as well as Hada et al. (2018ApJ...860..141H, 1H 0323+342) and Asada & Nakamura (2012ApJ...745L..28A, M87)SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (B1950)meta.id;meta.maincharONameOther namemeta.idcharlogMBH2? Black hole mass estimated by a stellar velocity dispersion method and associated Fundamental Plane method (for 2200+420)log(solMass)phys.massfloatnullabler_logMBH2Reference for logMBH2, in refs.dat filemeta.ref;pos.framechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainn_Name[*] Note on name (1)meta.notecharClass[QBNG] Optical class (2)src.classcharz? Redshiftsrc.redshiftfloatnullabler_zReference for Redshift, in refs.dat filemeta.ref;pos.framecharbetaapp? Maximum apparent radial speed from Lister et al. (2019ApJ...874...43L, Cat. J/ApJ/874/43)cphys.velocfloatnullabledelta? variability Doppler factor from Hovatta et al. (2009A&A...494..527H)spect.dopplerParamfloatnullablen_delta[a] Note on delta (3)meta.notecharthetaviewing anglearcminpos.posAngfloatn_theta[bc] Note on theta (3)meta.notecharlogMBH? Black hole mass estimated basing on assumption of virialized BLR movement and correlation between the size of BLR and ultraviolet (UV)/optical luminositylog(solMass)phys.massfloatnullabler_logMBHReference for logMBH, in refs.dat filemeta.ref;pos.framecharJ/MNRAS/495/3576/table3Derived best-fitting parameters of a single fit dependence d=alpha(r+r_0_)^k^ for 319 AGN, and their k-valuesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource name (B1950)meta.id;meta.maincharBand[U UL] Observing band designations (1)instr.bandpasscharrminMinimum core separation in fitmaspos.angDistance;stat.minfloatrmaxmaximum core separation in fitmaspos.angDistancefloatalphaFitted alpha-parameter (in mas^1-k^ unit)meta.unit;meta.modelledfloate_alphaFitted alpha-parameter error (in mas^1-k^ unit)stat.error;pos.eq.rafloatr0Fitted r_0_ parametermasstat.param;meta.modelledfloate_r0Fitted r_0_ parameter errormasstat.errorfloatkFitted power-law indexspect.indexfloate_kFitted power-law index errorstat.errorfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableJ/MNRAS/495/3576/refsReferencesRefReferencemeta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBibCodeBibCodemeta.bib.bibcodecharComCommentsmeta.notechar