J/ApJ/752/45ivo://CDS.VizieR/J/ApJ/752/45doi:10.26093/cds/vizier.17520045CDSTollerud E.J.Beaton R.L.Geha M.C.Bullock J.S.Guhathakurta P.,Kalirai J.S.Majewski S.R.Kirby E.N.Gilbert K. M.Yniguez B.,Patterson R.J.Ostheimer J.C.Cooke J.Dorman C.E.Choudhury A.,Cooper M.C.2017-12-06T07:37:57Z2014-02-24T12:51:49ZCDS support team

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

cds-question@unistra.frphotometryradial-velocityline-intensitiesgalaxiesWe present a resolved star spectroscopic survey of 15 dwarf spheroidal (dSph) satellites of the Andromeda galaxy (M31). We filter foreground contamination from Milky Way (MW) stars, noting that MW substructure is evident in this contaminant sample. We also filter M31 halo field giant stars and identify the remainder as probable dSph members. We then use these members to determine the kinematical properties of the dSphs. For the first time, we confirm that And XVIII, XXI, and XXII show kinematics consistent with bound, dark-matter-dominated galaxies. From the velocity dispersions for the full sample of dSphs we determine masses, which we combine with the size and luminosity of the galaxies to produce mass-size-luminosity scaling relations. With these scalings we determine that the M31 dSphs are fully consistent with the MW dSphs, suggesting that the well-studied MW satellite population provides a fair sample for broader conclusions. We also estimate dark matter halo masses of the satellites and find that there is no sign that the luminosity of these galaxies depends on their dark halo mass, a result consistent with what is seen for MW dwarfs. Two of the M31 dSphs (And XV, XVI) have estimated maximum circular velocities smaller than 12 km/s (to 1{sigma}), which likely places them within the lowest-mass dark matter halos known to host stars (along with Bootes I of the MW). Finally, we use the systemic velocities of the M31 satellites to estimate the mass of the M31 halo, obtaining a virial mass consistent with previous results.2012ApJ...752...45Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/752/45CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/736/146 : Radial velocities of stars in Bootes I (Koposov+, 2011)J/A+A/509/A61 : Long slit spectroscopy in M31 (Saglia+, 2010)J/ApJ/704/385 : M31 integrated light abundances (Colucci+, 2009)J/MNRAS/390/1437 : Stellar streams in Andromeda (M31) (Chapman+, 2008)J/MNRAS/369/120 : Kinematic survey of PNe in M31 (Merrett+, 2006)J/AJ/129/2232 : Variable stars in And I and And III (Pritzl+, 2005)J/AJ/127/318 : BV photometry of Andromeda II variables (Pritzl+, 2004)J/AJ/124/1464 : Variable stars in Andromeda VI (Pritzl+, 2002)J/A+AS/127/409 : New nearby dwarf galaxy candidates list (Karachentseva+ 1998)J/AJ/106/986 : CMD for And III (Armandroff+, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/752/45https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/752/45http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/752/45https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/752/45https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/752/45http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/752/45GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/752/45/table2 (SPLASH M31 dwarf spheroidal (dSph) stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/752/45/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/752/45/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/752/45/table2?GETtext/xml+votable180.050000true11.447791738.10847220.0055555555555555566/2108 2110 2216 2234 2565 2572 2573 2604 2611 2628 2668 2676 2746 2852 13655 13807 14148 14149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/752/45?format=asciiOpticaldefaultJ/ApJ/752/45/table1Observed DEIMOS slitmasksExp[1800/10800] Total exposure timestime.duration;obs.exposureintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatAndromeda Satellite identification (I to XXII)meta.idcharMaskMask name on which star observedmeta.notecharprimaryNsNumber of stars within this Mask (and link to table 2)meta.numberintnullableMJDModified Julian Datedtime.epochdoubleDateUTC observation datetime.epoch;obsnullableNslit[62/152] Number of slitsmeta.numberintNVel[6/110] Number of successful velocities (1)meta.numberintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/752/45/table2SPLASH M31 dwarf spheroidal (dSph) starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMaskMask name on which star observed; see Table 1meta.notecharSatAndromeda satellite number (I to XXII)meta.id.parentSeq[992/60102604] Star ID number; unique within a dSph fieldmeta.id;meta.mainintRAJ2000[0/23] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[28/50] Degree of Declination (J2000)pos.eq.dec;meta.mainT2mag[19.5/23.1] Washington T_2_ band magnitude; extinction correctedmagphot.mag;em.opt.Ifloate_T2mag[0.007/0.2] Uncertainty in T2magmagstat.error;phot.magfloatM-T2[0.8/2.3] Washington (M-T_2_) color index; extinction correctedmagphot.color;em.opt.V;em.opt.Ifloate_M-T2[0.02/0.2] Uncertainty in M-T2magstat.errorfloatHRV[-530/-116] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[1/24] Uncertainty in HRVkm/sstat.errorfloatEW[-4/2.2] Equivalent width of NaI 8190 feature; in units of Angstroms0.1nmspect.line.eqWidthfloate_EW[0/5] Uncertainty in EW0.1nmstat.error;spect.line.eqWidthfloatMmb[0/1] Membership probability (1)stat.probabilityfloat