J/A+A/408/873ivo://CDS.VizieR/J/A+A/408/873doi:10.26093/cds/vizier.34080873CDSCorsini E.M.Pizzella A.Coccato L.Bertola F.2017-09-29T09:02:31Z2003-11-11T20:48:40ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyspectroscopyWe measured the ionized-gas and stellar kinematics along the major and minor axis of a sample of 10 early-type spirals. Much to our surprise we found a remarkable gas velocity gradient along the minor axis of 8 of them. According to the kinematic features observed in their ionized-gas velocity fields, we divide our sample galaxies in three classes of objects. (i) NGC 4984, NGC 7213, and NGC 7377 show an overall velocity curve along the minor axis without zero-velocity points, out to the last measured radius, which is interpreted as due to the warped structure of the gaseous disk. (ii) NGC 3885, NGC 4224, and NGC 4586 are characterized by a velocity gradient along both major and minor axis, although non-zero velocities along the minor axis are confined to the central regions. Such gas kinematics have been explained as being due to non-circular motions induced by a triaxial potential. (iii) NGC 2855 and NGC 7049 show a change of slope of the velocity gradient measured along the major axis (which is shallower in the center and steeper away from the nucleus), as well as non-zero gas velocities in the central regions of the minor axis. This has been attributed to the presence of a kinematically-decoupled gaseous component in orthogonal rotation with respect to the galaxy disk, namely an inner polar disk. The case and origin of inner polar disks are discussed and the list of their host galaxies is presented.2003A&A...408..873Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/408/873CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/408/873https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/408/873http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/408/873https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/408/873https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/408/873http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/408/873GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/408/873/table3Ionized-gas kinematics for the sample galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the galaxymeta.id;meta.maincharprimaryPAPosition angle of the slit (G1)degpos.posAngintrDistance from galaxy centerarcsecpos.angDistancefloatvg(r)Line-of-sight gas mean velocitykm/sphys.veloc;stat.meaninte_vg(r)Error of v_g(r)_km/sstat.errorintsigmagLine-of-sight gas velocity dispersionkm/sphys.veloc.dispersioninte_sigmagError of sigma_g(r)_km/sstat.errorintSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/A+A/408/873/table4Stellar kinematics for the sample galaxiesPAPosition angle of the slit (G1)degpos.posAngintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the galaxymeta.id;meta.maincharprimaryrDistance from galaxy centerarcsecpos.angDistancefloatv*(r)Line-of-sight star mean velocitykm/sphys.veloc;stat.meaninte_v*(r)Error of v_*(r)km/sstat.errorintsigma*Line-of-sight star velocity dispersionkm/sphys.veloc.dispersioninte_sigma*Error of sigma_*(r)km/sstat.errorint