J/MNRAS/502/2859ivo://CDS.VizieR/J/MNRAS/502/2859CDSNiederhofer F.Cioni M.-R.L.Rubele S.Schmidt T.Diaz J.D.,Matijevic G.Bekki K.Bell C.P.M.de Grijs R.El Youssoufi D.,Ivanov V.D.Oliveira J.M.Ripepi V.Subramanian S.Sun N.-C.,van Loon J.T.2023-11-16T09:12:29Z2023-11-16T10:11:49ZCDS support team

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

cds-question@unistra.frmagellanic-cloudsproper-motionsinfrared-astronomyWe used data from the near-infrared Visible and Infrared Telescope for Astronomy (VISTA) survey of the Magellanic Cloud system (VMC) to measure proper motions (PMs) of stars within the Small Magellanic Cloud (SMC). The data analysed in this study comprise 26 VMC tiles, covering a total contiguous area on the sky of ~40deg^2^. Using multi-epoch observations in the K_s_ band over time baselines between 13 and 38 months, we calculated absolute PMs with respect to ~130000 background galaxies. We selected a sample of ~2160000 likely SMC member stars to model the centre-of-mass motion of the galaxy. The results found for three different choices of the SMC centre are in good agreement with recent space-based measurements. Using the systemic motion of the SMC, we constructed spatially resolved residual PM maps and analysed for the first time the internal kinematics of the intermediate-age/old and young stellar populations separately. We found outward motions that point either towards a stretching of the galaxy or stripping of its outer regions. Stellar motions towards the North might be related to the 'Counter Bridge' behind the SMC. The young populations show larger PMs in the region of the SMC Wing, towards the young Magellanic Bridge. In the older populations, we further detected a coordinated motion of stars away from the SMC in the direction of the Old Bridge as well as a stream towards the SMC.2021MNRAS.502.2859Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/502/2859CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/502/2859https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/502/2859http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/502/2859https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/502/2859https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/502/2859http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/502/2859GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/502/2859/oldpm (Binned absolute PMs of the old SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/oldpm?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/oldpm?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/oldpm?GETtext/xml+votable180.050000true28.63602785-73.801443510.005555555555555556Cone search capability for table J/MNRAS/502/2859/oldres (Binned residual PMs of the old SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/oldres?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/oldres?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/oldres?GETtext/xml+votable180.050000true28.63602785-73.801443510.005555555555555556Cone search capability for table J/MNRAS/502/2859/combpm (Binned absolute PMs of the combined SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/combpm?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/combpm?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/combpm?GETtext/xml+votable180.050000true28.88235239-74.087468470.005555555555555556Cone search capability for table J/MNRAS/502/2859/combres (Binned residual PMs of the combined SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/combres?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/combres?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/combres?GETtext/xml+votable180.050000true28.88235239-74.087468470.005555555555555556Cone search capability for table J/MNRAS/502/2859/youngpm (Binned absolute PMs of the young SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/youngpm?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/youngpm?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/youngpm?GETtext/xml+votable180.050000true28.20207023-73.754582520.005555555555555556Cone search capability for table J/MNRAS/502/2859/youngres (Binned residual PMs of the young SMC stellar population)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/502/2859/youngres?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/502/2859/youngres?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/502/2859/youngres?GETtext/xml+votable180.050000true28.20207023-73.754582520.0055555555555555564/2082 5/8323-8326 8332 6/32953-32956 32958-32959 33285-33287 33289-33291 33308-33310 33332 33336-33338 33409 33412-33413 45329 45332-45333https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/502/2859?format=asciiInfrareddefaultJ/MNRAS/502/2859/oldpmBinned absolute PMs of the old SMC stellar populationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloate_pmWError on pmW (G3)mas/yrstat.errorfloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberintJ/MNRAS/502/2859/oldresBinned residual PMs of the old SMC stellar populationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloate_pmWError on pmW (G3)mas/yrstat.errorfloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberintJ/MNRAS/502/2859/combpmBinned absolute PMs of the combined SMC stellar populationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloate_pmWError on pmW (G3)mas/yrstat.errorfloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberintJ/MNRAS/502/2859/combresBinned residual PMs of the combined SMC stellar populatione_pmWError on pmW (G3)mas/yrstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberintJ/MNRAS/502/2859/youngpmBinned absolute PMs of the young SMC stellar populationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloate_pmWError on pmW (G3)mas/yrstat.errorfloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberintJ/MNRAS/502/2859/youngresBinned residual PMs of the young SMC stellar populationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (G1)degpos.eq.dec;meta.mainpmWProper motion {mu}_W_=-{mu}_{alpha}_cos{delta} (G2)mas/yrpos.pm;pos.eq.rafloate_pmWError on pmW (G3)mas/yrstat.errorfloatpmNProper motion {mu}_N_={mu}_{delta}_ (G2)mas/yrpos.pm;pos.eq.decfloate_pmNError on pmN (G3)mas/yrstat.errorfloatNNumber of stars within the binmeta.numberint