J/A+A/426/463ivo://CDS.VizieR/J/A+A/426/463doi:10.26093/cds/vizier.34260463CDSOrienti M.Dallacasa D.Fanti C.Fanti R.Tinti S.Stanghellini C.2018-08-22T13:16:03Z2004-12-21T21:09:39ZCDS support team

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

cds-question@unistra.frradio-sourcesradio-galaxiesquasarsredshiftedWe present the results of VLBA observations at 6 and 3.6cm for eighteen Compact Steep Spectrum radio sources (CSS) from the B3-VLA CSS sample. In most cases these VLBA images display a "Double/Triple" morphology, and the core is unambiguously detected in seven sources. Multifrequency images allow us to study the spectral properties of the individual source components and to constrain the spectral age. In lobe-dominated sources the radiative ages deduced from the synchrotron theory are in the range of up 5x10^3^ years, if equipartition magnetic field is assumed. Polarized emission is detected at a few percent level for two sources only. They were the only two sources displaying polarized emission in VLA A configuration data, and this implies that beam depolarization is not effective in reducing the integrated fractional polarization for these sources.2004A&A...426..463Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/426/463CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/369/380 : CSS/GPS radio sources VLA observations (Fanti+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/426/463https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/426/463http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/426/463https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/426/463https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/426/463http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/426/463GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/426/463/table1 (The VLBA sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/426/463/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/426/463/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/426/463/table1?GETtext/xml+votable180.050000true10.52999767937.660489020.0055555555555555566/2446 2610 5443 5479 5507 5722 6491 6496 6946 10584 10608 10634 10815 13626 13668 13686 20479 286683.2467741526420485e-24 5.5658981862942334e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/426/463?format=asciiRadiodefaultJ/A+A/426/463/table1The VLBA samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name, HHMM+DDdA (B1950);meta.id;meta.maincharType[GgQE] Optical identification from Paper I, Fanti et al., 2001, Cat. <J/A+A/369/380> (1)src.classcharRmag? R magnitudemagphot.mag;em.opt.Rfloatnullablez? Redshiftsrc.redshiftfloatnullablen_z[R] R indicates a photometric redshift from R (from POSS prints) magnitude (see Paper I for details)meta.notecharS4.9GHzvlaVLA 4.9GHz (6cm) flux density, from Paper ImJyphot.flux.density;em.radio.3-6GHzfloatS5GHzvlbaTotal VLBA 5.0GHz flux density, measured on the images presented heremJyphot.flux.density;em.radio.3-6GHzfloatS8.4GHzvlaVLA 8.4GHz (3.6cm) flux density, from Paper ImJyphot.flux.density;em.radio.6-12GHzfloatS8.4GHzvlba? Total VLBA 8.4GHz flux density, measured on the images presented heremJyphot.flux.density;em.radio.6-12GHzfloatnullableLASVLBA Largest Angular Size, measured on the most suitable images at the different resolution and frequency, presented heremaspos.distance;phys.sizeintl_LLS[~] Limit flag on LLS (2)meta.code.errorcharLLSLargest Linear Size from VLBA data (in kpc/h)kpcphys.angSizefloatFantiDetails from Fanti et al. (J/A+A/369/380)meta.ref.urlchar_RAPosition from Fanti et al. (J/A+A/369/380) (right ascension part)degpos.eq.ra;meta.main_DEPosition from Fanti et al. (J/A+A/369/380) (declination part)degpos.eq.dec;meta.mainJ/A+A/426/463/table2Observational parameters of source componentsNameSource name (B1950)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCompSub-component label of the sourcemeta.code.multipcharn_Comp[~] ~: the component is extended (1)meta.notecharn_Name[*] Note on Name (2)meta.notecharS5.0GHzVLBA flux density at 5.0GHzmJyphot.flux.density;em.radio.3-6GHzfloatS4.8GHz? VLBA flux density at 5.0GHzmJyphot.flux.density;em.radio.3-6GHzfloatnullablel_Sp+Index1Limit flag on Sp+Index(1.67-5.0)meta.code.errorcharSp+Index1? Spectral index {alpha}_1.67_^5.0^ (3)spect.indexfloatnullableSp+Index2? Spectral index {alpha}_5.0_^8.4^ (3)spect.indexfloatnullablethetamaj? Deconvolved angular size of major axis (4)masphys.angSizefloatnullablethetamin? Deconvolved angular size of minor axis (4)masphys.angSize.sminAxisfloatnullablePA? Position angle of the major axis (4)degpos.posAngintnullable