J/ApJ/798/77ivo://CDS.VizieR/J/ApJ/798/77doi:10.26093/cds/vizier.17980077CDSHo N.Geha M.Tollerud E.J.Zinn R.Guhathakurta P.Vargas L.C.2017-12-07T07:27:35Z2015-06-18T12:32:32ZCDS support team

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

cds-question@unistra.frmetallicityinfrared-photometryvisible-astronomyphotometrygalaxiesWe present global metallicity properties, metallicity distribution functions (MDFs), and radial metallicity profiles for the six most luminous M31 dwarf galaxy satellites: M32, NGC 205, NGC 185, NGC 147, Andromeda VII, and Andromeda II. The results presented are the first spectroscopic MDFs for dwarf systems surrounding a host galaxy other than the Milky Way (MW). Our sample consists of individual metallicity measurements for 1243 red giant branch member stars spread across these six systems. We determine metallicities based on the strength of the Ca II triplet lines using the empirical calibration of Carrera et al. (2013, J/MNRAS/434/1681), which is calibrated over the metallicity range -4<[Fe/H]<+0.5. We find that these M31 satellites lie on the same luminosity-metallicity relationship as the MW dwarf satellites. We do not find a trend between the internal metallicity spread and galaxy luminosity, contrary to previous studies. The MDF widths of And II and And VII are similar to the MW dwarf spheroidal (dSph) satellites of comparable luminosity; however, our four brightest M31 dwarf satellites are more luminous than any of the MW dSphs and have broader MDFs. The MDFs of our six M31 dwarf satellites are consistent with the leaky box model of chemical evolution, although our metallicity errors allow a wide range of evolution models. We find a significant radial gradient in metallicity in only two of our six systems, NGC 185 and Andromeda II, and flat radial metallicity gradients in the rest of our sample with no observed correlation between rotational support and radial metallicity gradients. Although the average properties and radial trends of the M31 dwarf galaxies agree with their MW counterparts at similar luminosity, the detailed MDFs are different, particularly at the metal-rich end.2015ApJ...798...77Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/798/77CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/434/1681 : Extremely metal-poor stars CaII triplet (Carrera+, 2013)J/ApJ/768/172 : Kinematic analysis of RGB in M31 dSphs (Collins+, 2013)J/ApJ/765/140 : Stacked spectra of SDSS star forming gal. (Andrews+, 2013)J/ApJ/763/61 : Abundances of red giant members of BootesI (Gilmore+, 2013)J/A+A/544/A73 : BVI photometry of Fornax dSph galaxy (de Boer+, 2012)J/AJ/144/4 : Dwarf galaxies data in the Local Group (McConnachie+, 2012)J/ApJ/752/45 : SPLASH: Stellar spectro. of M31 satellites (Tollerud+, 2012)J/MNRAS/411/1013 : CaII triplet in Sextans dSph galaxy (Battaglia+, 2011)J/ApJ/711/361 : Local Group dE galaxies. II. (Geha+, 2010)J/ApJ/708/560 : Spectroscopy of UMa II and Coma Ber (Frebel+, 2010)J/ApJ/705/328 : Abundance measurements in Sculptor dSph (Kirby+, 2009)J/MNRAS/383/183 : CaII triplet of RGB from VLT/FLAMES obs. (Battaglia+, 2008)J/A+A/467/1025 : JHK photometry of Fornax RGB stars (Gullieuszik+, 2007)J/AJ/133/270 : Metallicities and ages in Leo II dSph (Koch+, 2007)J/A+A/459/423 : VI and [Fe/H] of Fornax dSph RGB stars (Battaglia+, 2006)J/AJ/131/895 : Stars in the Carina dwarf spheroidal galaxy (Koch+, 2006)J/AJ/131/332 : Velocities of individual stars in NGC 205 (Geha+, 2006)J/AJ/127/840 : VRI photometry of Fornax red giants (Pont+, 2004)J/AJ/124/234 : M31 outer halo UBVRI photom. & metallicity (Reitzel+, 2002)J/MNRAS/327/918 : CaII in extragalactic red giants (Tolstoy+, 2001)J/PASP/110/533 : BR photometry of Fornax bright stars (Stetson+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/798/77https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/798/77http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/798/77https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/798/77https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/798/77http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/798/77GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/798/77/table1 (Summary of M31 dwarf metallicity properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/798/77/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/798/77/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/798/77/table1?GETtext/xml+votable180.050000true10.674270840.86516940.005555555555555556Cone search capability for table J/ApJ/798/77/table2 (Metallicity of individual stars in each galaxy)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/798/77/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/798/77/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/798/77/table2?GETtext/xml+votable180.050000true10.702083340.79005560.0055555555555555566/2229 2231 2272 2274 2622 2623 2709 2771 2774 2777 2780 14149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/798/77?format=asciiOpticalInfrareddefaultJ/ApJ/798/77/table1Summary of M31 dwarf metallicity propertiesGalDwarf galaxy namemeta.id;meta.maincharprimaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDist[617/824] Distance to the galaxy (1)kpcpos.distance;pos.heliocentricintVMag[-16.5/-12.4] Absolute V-band magnitude (1)magphot.mag;em.opt.VfloatN*[64/321] Number of stars in the final metallicity samplemeta.numberint<[Fe/H]>[-1.3/-0.5] Average-weighted mean metallicitylog(Sun)phys.abund.Fefloate_<[Fe/H]>[0.04/0.08] <[Fe/H]> uncertaintylog(Sun)stat.error;phys.abund.Fefloats[Fe/H][0.3/0.6] Internal metallicity dispersion (2)log(Sun)stat.variancefloate_s[Fe/H][0.04/0.08] s[Fe/H] uncertaintylog(Sun)stat.error;phys.abund.FefloatSkew[-0.9/0.003] Skewness (3)stat.fit.paramfloate_Skew[0.02/0.06] Skew uncertaintystat.errorfloatKurt[-0.7/1.4] Excess kurtosis (4)stat.fit.paramfloate_Kurt[0.1/0.5] Kurt uncertaintystat.errorfloatrh[110/1176] Half-light radius r_h_ (1)pcphys.size.radiusintgrad[-0.4/0.02] Radial metallicity gradient (5)arith.gradfloate_grad[0.01/0.04] Gradient uncertainty (5)stat.errorfloatp.eff[0.07/0.5] Best-fit value of the stellar effective yield (6)phys.composition.yieldfloate_p.eff[0.001/0.005] p.eff uncertaintystat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/798/77/table2Metallicity of individual stars in each galaxyGalDwarf galaxy namemeta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/321] Internal Star ID numbermeta.id.part;meta.mainintRAJ2000[0/23] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[33/50] Degree of Declination (J2000)pos.eq.dec;meta.mainV-I[0.6/3.6] Extinction corrected (V-I) color indexmagphot.color;em.opt.V;em.opt.IfloatVmag[20.6/24] Extinction corrected V-band magnitudemagphot.mag;em.opt.Vfloat[Fe/H][-4/0.5] Iron abundance relative to the Sunlog(Sun)phys.abund.Fedoublee_[Fe/H][0.2/1] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.FefloatM31CatSources within 1" from Geha et al. 2010 (J/ApJ/711/361; for NGC 147 and NGC 185); Geha et al. 2006 (J/AJ/131/332 for NGC 205) and Tollerud et al. 2012 (J/ApJ/752/45; for And VII)meta.ref.urlintnullable