J/A+A/318/416ivo://CDS.VizieR/J/A+A/318/416doi:10.26093/cds/vizier.33180416CDSPont F.Queloz D.Bratschi P.Mayor M.1997-12-09T16:51:03Z1997-12-09T17:50:58ZCDS support team

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

cds-question@unistra.frvariable-starsradial-velocityphotometryRadial velocities and distances have been measured for a sample of 48 remote classical Cepheids located in the outer disc of the Galaxy (118deg<l<274deg). The distances are determined from BVI photometry, with semi-empirical metallicity corrections calibrated on the Magellanic Clouds. Using these Cepheids as tracers, the rotation curve of the disc is determined between R_0_ and 2R_0_. The result is a flat rotation curve about 30km/s lower than theta_0_, V_rot_=193+/-4km/s for R_0_==8.5kpc and theta_0_=220kms/s assumed, or V_rot_=167+/-4km/s for R_0_=8kpc and theta_0_=200km/s. The possible presence of non-axisymmetric components in the rotation of the outer disc is considered. We find a very small or vanishing value for any radial motion of the LSR or expansion/contraction motion.1997A&A...318..416Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/318/416CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/318/416https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/318/416http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/318/416https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/318/416https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/318/416http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/318/416GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/318/416/coravelCoravel measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RV? rms uncertainty on RVkm/sstat.errorfloatNameObject namemeta.id;meta.maincharComComment (1)meta.notecharJ/A+A/318/416/elodieElodie measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocetric Julian datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVrms uncertainty in RV (photon noise only)km/sstat.errorfloatNameObject namemeta.id;meta.maincharJ/A+A/318/416/photomPhotometric measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharHJDHeliocentric Julian datedtime.epochdoubleVmagV (Geneva) filtermagphot.mag;em.opt.VfloatV-BV-B (Geneva) filtermagphot.colorfloatV-RV-R (Gunn) filtermagphot.colorfloatV-IV-I (Cousins) filermagphot.color;em.opt.V;em.opt.IfloatComComment (1)meta.notechar