J/AJ/168/255ivo://CDS.VizieR/J/AJ/168/255doi:10.26093/cds/vizier/be-58-7zCDSHota S.Subramaniam A.Nayak P.K.Subramanian S.2026-07-02T11:45:04Z2025-09-01T14:53:17ZCDS support team

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

cds-question@unistra.frultraviolet-astronomygalaxiesphotometrydwarf-galaxiesmagellanic-cloudssurveysvisible-astronomyinfrared-astronomyThe Small Magellanic Cloud (SMC) is an irregular dwarf galaxy that has recently undergone an interaction with the Large Magellanic Cloud. The young massive stars in the SMC formed in the disturbed low-metallicity environment are important targets in astrophysics. We present a catalog of ~76,800 far-ultraviolet (FUV) sources toward the SMC detected using the Ultra Violet Imaging Telescope onboard AstroSat. We created an FUV catalog with ~62,900 probable SMC members which predominantly comprise main-sequence, giant, and subgiant stars. We selected four young populations (Young 1, Young 2, Young 3, and Blue Loop (BL) stars) identified from the Gaia optical color-magnitude diagram to study the morphology and kinematics of the young SMC using this catalog. We detect a clumpy morphology with a broken bar, a shell-like structure, and the inner SMC Wing for the four stellar populations. The eastern region and the northeastern regions are mainly populated by Young 1, 2, and 3 stars. The central region predominantly has the Young 2 and 3 populations, whereas the SW has BL stars, and Young 2 and 3 stars. The 2D kinematic study using proper motion (PM) reveals that Young 2 and 3 populations show two kinematically distinct subpopulations with low and high PM dispersion, whereas the Young 1 and BL stars show two kinematically distinct populations with low dispersion. Our analysis points to a kinematic disturbance along the R.A. direction for stars younger than ~150Myr located in the eastern region, with no significant disturbance along the decl.2024AJ....168..255Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/255CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/375 : VISTA Magellanic Survey (VMC) cat. (YJKs) DR6 (Cioni+, 2011)II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)J/AJ/113/1011 : UV Observations of the SMC (Cornett+ 1997)J/AJ/127/1531 : Star formation history of SMC (Harris+, 2004)J/AJ/140/416 : IR photometry of massive stars in the SMC (Bonanos+, 2010)J/A+A/517/A50 : Ages & lum. of young SMC/LMC star clusters (Glatt+, 2010)J/other/Sci/337.444 : RV curves of Galactic massive O stars (Sana+, 2012)J/ApJS/213/34 : Veloc. of Cygnus OB2 massive binaries (Kobulnicky+, 2014)J/ApJS/215/15 : SMaSH+: observations and companion detection (Sana+, 2014)J/MNRAS/449/639 : VMC survey. XIV. SFR in SMC (Rubele+, 2015)J/A+A/591/A11 : SMC BV photometry of 9 star cluster fields (Dias+, 2016)J/ApJ/816/49 : Spitzer/IRAC observations of SMC Cepheids (Scowcroft+, 2016)J/AJ/154/199 : SMASH: Survey of MAgellanic Stellar History (Nidever+, 2017)J/MNRAS/472/808 : YJKs light curves of SMC Classical Cepheids (Ripepi+, 2017)J/A+A/616/A187 : SMC clusters age-dating & classification (Nayak+, 2018)J/A+A/628/A51 : Magellanic Clouds reddening map (Joshi+, 2019)J/ApJ/887/267 : OB stars embedded in the HI gas of SMC (Murray+, 2019)J/MNRAS/495/98 : Tidal scars of the Small Magellanic Cloud (De Leo+, 2020)J/ApJ/904/13 : RVel for 10 giant eclipsing binaries (Graczyk+, 2020)J/ApJS/247/47 : UV survey of M31 with UVIT on AstroSat (Leahy+, 2020)J/A+A/649/A7 : MC structure and properties (Gaia Collaboration+, 2021)J/AJ/161/74 : SMASH DR2. 197 SMASH fields (Nidever+, 2021)J/MNRAS/502/2859 : The VMC survey XLI - PMs within the SMC (Niederhofer+, 2021)J/MNRAS/504/2983 : Reddening of SMC red clump stars (Tatton+, 2021)J/MNRAS/513/5847 : Red supergiants in binary systems. I. SMC (Patrick+, 2022)J/ApJ/946/65 : AstroSat/UVIT obs. SMC: point-source cat. (Devaraj+, 2023)J/A+A/672/A65 : Clean SMC stellar samples (Jimenez-Arranz+, 2023)J/A+A/690/A289 : Binarity at LOw Metallicity (BLOeM). I. (Shenar+, 2024)J/ApJS/275/34 : UVIT DR1, comprehensive catalog of UVIT obs. (Piridi+, 2024)http://astrobrowse.issdc.gov.in/astro_archive/archive/Home.jsp : ISRO Sciencehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/255https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/255http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/255https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/255https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/255http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/255GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/255/table2 (FUV catalog of the sources detected in the direction of the SMC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/255/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/255/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/255/table2?GETtext/xml+votable180.050000true10.31532375-73.277605830.0055555555555555566/33293-33295 33297-33299 33304-33306 33316-33317 33319 33328 333301.1169896778146728e-18 1.1968338161368843e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/255?format=asciiUVOpticalInfrareddefaultJ/AJ/168/255/table2FUV catalog of the sources detected in the direction of the SMCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUVIT[0/76837] UVIT identification numbermeta.id;meta.mainintRA_ICRS[9.6/22.9] Right Ascension (ICRS)degpos.eq.ra;meta.mainindexedDE_ICRS[-74/-71] Declination (ICRS)degpos.eq.dec;meta.mainindexedFUVmag[13.2/20.4] FUV (172nm) AB magnitudemagphot.mag;em.UV.100-200nmfloate_FUVmag[0.01/0.2] Uncertainty in FUVmagmagstat.error;phot.mag;em.UV.100-200nmfloatVMC[558345786944/558383763884]? VMC PSF source identifier (1)meta.idnullableGaiaDR3? Gaia DR3 source identifier (source_id) (1)meta.idnullableMm[NY] Probable SMC member? (2)meta.code.memberchar