J/MNRAS/486/2995ivo://CDS.VizieR/J/MNRAS/486/2995doi:10.26093/cds/vizier.74862995CDSMalhan K.Ibata R.A.2024-08-19T20:18:16Z2019-07-04T08:56:58ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyphotometryWe use ESA/Gaia astrometry together with SEGUE and LAMOST measurements of the GD-1 stellar stream to explore the improvement on the Galactic gravitational potential that these new data provide. Assuming a realistic universal model for the dark matter halo together with reasonable models of the baryonic components, we find that the orbital solutions for GD-1 require the circular velocity at the Solar radius to be V_circ_(R_{sun}_)=244+/-4km/s, and also that the density flattening of the dark halo is q_rho_=0.82^+0.25^_-0.13_. The corresponding Galactic mass within 20kpc was estimated to be M_MW_(<20kpc)=2.5+/-0.2x10^11^M_{sun}_. Moreover, Gaia's excellent proper motions also allowed us to constrain the velocity dispersion of the GD-1 stream in the direction tangential to the line of sight to be <2.30km/s (95% confidence limit), confirming the extremely cold dynamical nature of this system.2019MNRAS.486.2995Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/486/2995CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/486/2995https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/486/2995http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/486/2995https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/486/2995https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/486/2995http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/486/2995GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/486/2995/table2 (GD-1 star members with measured line-of-sight velocities from SEGUE and LAMOST)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/486/2995/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/486/2995/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/486/2995/table2?GETtext/xml+votable180.050000true138.3998622.412980.0055555555555555566/4538 4933-4935 4946-4947 4950-4953 4957 5641 5659 5663 5699 5708-5709 5715 5718-5719 5721-5726 5890-5891 5894-5896 5900-5901 5905-5907 5910-5913 5915-5916 5958 5972-5973 11007 11131 11165 11167 11174-11175 11180-11181 11186-11187 11216-11217 11490https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/486/2995?format=asciidefaultJ/MNRAS/486/2995/table2GD-1 star members with measured line-of-sight velocities from SEGUE and LAMOSTSimbadNameSimbad column added by the CDSmeta.idcharRAJ2000Right ascension (J2000) (1)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDEJ2000Declination (J2000) (1)degpos.eq.dec;meta.mainGmag0Extinction corrected Gaia magnitude G (2)magphot.mag;arith.difffloat(GBP-GRP)0Extinction corrected Gaia color GBP-GRP (2)magphot.color;em.opt.B;em.opt.RfloatVlosObserved line of sight velocitieskm/sphys.velocfloate_VlosUncertainties in observed line of sight velocitieskm/sstat.errorfloat[Fe/H]? Observed metallicitiesphys.abund.Fedoublenullablee_[Fe/H]? Uncertainties in observed metallicitiesstat.error;phys.abund.FedoublenullableSource[LS- ] Whether source is from SDSS/SEGUE or LAMOST surveymeta.codecharPmember[YN] Membership probabilitystat.probabilitychar