J/AJ/110/2747ivo://CDS.VizieR/J/AJ/110/2747doi:10.26093/cds/vizier.51102747CDSSchweitzer A.E.Cudworth K.M.Majewski S.R.Suntzeff N.B.2023-04-06T16:50:19Z1997-12-09T20:31:55ZCDS support team

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

cds-question@unistra.frproper-motionsastronomical-object-identificationUsing 26 plates taken over the course of more than half a century, we present proper motions and photometry for 1177 stars in the central region of the Sculptor dwarf spheroidal galaxy, down to a limiting magnitude of V~20.25 at the level of the horizontal branch. The proper-motion cleaned color-magnitude diagram retained a broad giant branch, further supporting an intrinsic spread in metallicity. We determined an absolute proper motion for Sculptor, relative to background galaxies, of mu_alpha=+0.036+/-0.022arcsec/century and mu_delta=0.043+/-0.025arcsec/century after correcting for the LSR and peculiar solar motions. Our proper-motion uncertainty is similar to or smaller than those obtained by different groups for other distant satellites of the Galaxy. When combined with Sculptor's distance and radial velocity, this measurement shows the dwarf spheroidal to have a space velocity of roughly 220+/-125km/s. Although our measurement is less than twice its uncertainty, the direction of Sculptor's motion is significant because it rules out motion along the Magellanic Stream. A 2.5 sigma error allows for motion in a direction toward the Fornax dwarf spheroidal galaxy, so Sculptor remains a possible member of the proposed Fornax-Leo-Sculptor stream.1995AJ....110.2747Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/110/2747CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/110/2747https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/110/2747http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/110/2747https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/110/2747https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/110/2747http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/110/2747GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/110/2747/table3 (Sculptor photometry, membership probabilities, positions, and proper motions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/110/2747/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/110/2747/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/110/2747/table3?GETtext/xml+votable180.050000true15.1299167-33.75652780.005555555555555556Cone search capability for table J/AJ/110/2747/table4 (Photometry and positions of possible variable stars in Sculptor)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/110/2747/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/110/2747/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/110/2747/table4?GETtext/xml+votable180.050000true14.9718333-33.68650.0055555555555555566/35549 35720https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/110/2747?format=asciiOpticaldefaultJ/AJ/110/2747/table3Sculptor photometry, membership probabilities, positions, and proper motionsSCMSIdentification from this studymeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintV78? ID from Van Agt, 1978PDDO....3..205Vmeta.idintH65ID from Hodge, 1965ApJ...142.1390Hmeta.idcharKD77? ID from Kunkel & Demers, 1977ApJ...214...21Kmeta.idintFBM82? ID from Frogel et al., 1982ApJ...252..133Fmeta.idintVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatPMemb*? Probability of membership%stat.fit.goodnessintXposX coordinate relative to dSph centerarcsecpos.projdoubleYposY coordinate relative to dSph centerarcsecpos.projdoubleRA2000Right Ascension (2000)pos.eq.ra;meta.mainDE2000Declination sign (2000)pos.eq.dec;meta.mainnullablepmX? Relative proper motion0.01mas.yr**-1pos.pminte_pmX? Standard error in pmX0.01mas.yr**-1stat.errorintpmY? Relative proper motion0.01mas.yr**-1pos.pminte_pmY? Standard error in pmY0.01mas.yr**-1stat.errorintJ/AJ/110/2747/table4Photometry and positions of possible variable stars in SculptorrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSCMSIdentification from this studymeta.id;meta.mainintV78? ID from Van Agt, 1978PDDO....3..205Vmeta.idintH65ID from Hodge, 1965ApJ...142.1390Hmeta.idcharKD77? ID from Kunkel & Demers, 1977ApJ...214...21Kmeta.idintFBM82? ID from Frogel et al., 1982ApJ...252..133Fmeta.idintVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatPMemb*? Probability of membership%stat.fit.goodnessintXposX coordinate relative to dSph centerarcsecpos.projdoubleYposY coordinate relative to dSph centerarcsecpos.projdoubleRA2000Right Ascension (2000)pos.eq.ra;meta.mainDE2000Declination sign (2000)pos.eq.dec;meta.mainnullablepmX? Relative proper motion0.01mas.yr**-1pos.pminte_pmX? Standard error in pmX0.01mas.yr**-1stat.errorintpmY? Relative proper motion0.01mas.yr**-1pos.pminte_pmY? Standard error in pmY0.01mas.yr**-1stat.errorint