J/ApJ/830/126ivo://CDS.VizieR/J/ApJ/830/126doi:10.26093/cds/vizier.18300126CDSFabrizio M.Bono G.Nonino M.Lokas E.L.Ferraro I.Iannicola G.,Buonanno R.Cassisi S.Coppola G.Dall'Ora M.Gilmozzi R.Marconi M.,Monelli M.Romaniello M.Stetson P.B.Thevenin F.Walker A.R.2018-10-08T12:03:09Z2017-02-20T09:24:26ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyradial-velocityinfrared-photometryvisible-astronomyWide-band photometryhorizontal-branch-starsgiant-starsWe present new radial velocity (RV) measurements of old (horizontal branch) and intermediate-age (red clump) stellar tracers in the Carina dwarf spheroidal. They are based on more than 2200 low-resolution spectra collected with VIMOS at Very Large Telescope (VLT). The targets are faint (20<~V<~21.5mag), but the accuracy at the faintest limit is <=9km/s. These data were complemented with RV measurements either based on spectra collected with FORS2 and FLAMES/GIRAFFE at VLT or available in the literature. We ended up with a sample of 2748 stars and among them, 1389 are candidate Carina stars. We found that the intermediate-age stellar component shows a well-defined rotational pattern around the minor axis. The western and the eastern side of the galaxy differ by +5 and -4km/s when compared with the main RV peak. The old stellar component is characterized by a larger RV dispersion and does not show evidence of the RV pattern. We compared the observed RV distribution with N-body simulations for a former disky dwarf galaxy orbiting a giant Milky Way-like galaxy. We rotated the simulated galaxy by 60{deg} with respect to the major axis, we kept the observer on the orbital plane of the dwarf and extracted a sample of stars similar to the observed one. Observed and predicted V_rot_/{sigma} ratios across the central regions are in remarkable agreement. This evidence indicates that Carina was a disky dwarf galaxy that experienced several strong tidal interactions with the Milky Way. Owing to these interactions, Carina transformed from a disky to a prolate spheroid and the rotational velocity transformed into random motions.2016ApJ...830..126Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/830/126CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/814/71 : Carina project IX: UBVI of Carina variables (Coppola+, 2015)J/A+A/580/A18 : Carina Project VIII. {alpha}-element abund. (Fabrizio+, 2015)J/A+A/572/A10 : (BV) photometry in Carina dSph (de Boer+, 2014)J/A+A/538/A100 : Abundances red giants in Carina dSph (Lemasle+, 2012)J/ApJ/751/102 : Equivalent widths of 9 RGB in Carina dSph (Venn+, 2012)J/PASP/124/519 : Iron abundances of red giants in Carina gal. (Fabrizio+, 2012)J/AJ/137/3100 : Radial velocities of 4 dSph galaxies (Walker+, 2009)J/AJ/135/1580 : Element abundances in ten red giants of Car dSph (Koch+, 2008)J/ApJ/649/201 : Velocities & Washington photom. in Carina dSph (Munoz+, 2006)J/AJ/130/2677 : Stars in the Carina dSph galaxy field (Majewski+, 2005)J/AJ/126/197 : Carina project. I. Bright variable stars (Dall'Ora+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/830/126https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/830/126http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/830/126https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/830/126https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/830/126http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/830/126GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/830/126/table2 (Radial velocities of spectroscopic targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/830/126/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/830/126/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/830/126/table2?GETtext/xml+votable180.050000true100.4846-50.92870.0055555555555555566/39091 39094 39097 39099 39100 39102https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/830/126?format=asciiInfraredOpticaldefaultJ/ApJ/830/126/table2Radial velocities of spectroscopic targetsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[3145/162379] Star Name (1)meta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmag[13.8/24.6] Literature V magnitude (1)magphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag (1)magstat.error;phot.mag;em.opt.VfloatBmag[14.5/25]? Literature B magnitude (1)magphot.mag;em.opt.Bfloatnullablee_Bmag? Uncertainty in Bmag (1)magstat.error;phot.mag;em.opt.BfloatnullableImag[12.9/24]? Literature I magnitude (1)magphot.mag;em.opt.Ifloatnullablee_Imag? Uncertainty in Imag (1)magstat.error;phot.mag;em.opt.IfloatnullableRVel[-364/457] Mean Radial Velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[0/37] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatSpecAdopted Spectrograph(s) (2)meta.id;obscharPop[0/4]? Stellar population flag (3)src.classintnullableCCatDisplay data from de Boer+, 2014, J/A+A/572/10 and Walker+, 2009, J/AJ/137/3100, within 1"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar