J/A+A/623/A65ivo://CDS.VizieR/J/A+A/623/A65doi:10.26093/cds/vizier.36230065CDSWang S.Ma J.Liu J.2019-03-21T12:36:44Z2019-03-06T06:57:42ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersspectral-energy-distributioninfrared-photometryvisible-astronomybroad-band-photometryultraviolet-photometrysloan-photometryIn this paper, we present photometry of 53 globular clusters (GCs) in the M31 outer halo, including the GALEX FUV and NUV, SDSS ugriz, 15 intermediate-band filters of BATC, and 2MASS JHKs bands. By comparing the multicolour photometry with stellar population synthesis models, we determine the metallicities, ages, and masses for these GCs, aiming to probe the merging/accretion history of M31. We find no clear trend of metallicity and mass with the de-projected radius. The halo GCs with age younger than ~8Gyr are mostly located at the de-projected radii around 100kpc, but this may be due to a selection effect. We also find that the halo GCs have consistent metallicities with their spatially-associated substructures, which provides further evidence of the physical association between them. Both the disk and halo GCs in M31 show a bimodal luminosity distribution. However, we should emphasize that there are more faint halo GCs which are not being seen in the disk. There are more faint halo GCs than the disk ones, and these faint GCs constitute the fainter part in the luminosity function. The bimodal luminosity function of the halo GCs may reflect different origin or evolution environment in their original hosts. The M31 halo GCs includes one intermediate metallicity group (-1.5<[Fe/H]<-0.4) and one metal-poor group ([Fe/H]<-1.5), while the disk GCs have one metal-rich group more. There are considerable differences between the halo GCs in M31 and the Milky Way (MW). The total number of M31 GCs is approximately three times more numerous than that of the MW, however, M31 has about six times the number of halo GCs in the MW. Compared to M31 halo GCs, the Galactic halo ones are mostly metal-poor. Both the numerous halo GCs and the higher-metallicity component are suggestive of an active merger history of M31.2019A&A...623A..65Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/623/A65CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/416/917 : M31 globular clusters revised Bologna Catalog (Galleti+, 2004)J/A+A/544/A155 : HST photometry of M31 globular clusters (Federici+, 2012)J/AJ/143/14 : Lick indices of M31 globular clusters (Schiavon+, 2012)J/ApJS/199/37 : GALEX catalog of star clusters in M31 (Kang+, 2012)J/ApJ/769/10 : Spectroscopy of M31 globular clusters (Jacoby+, 2013)J/AJ/146/20 : 79 M31 globular clusters structural parameters (Wang+, 2013)J/AJ/148/4 : JHK photometry of 913 globular clusters in M31 (Wang+, 2014)J/ApJ/797/116 : Chemical properties of M31 star clusters (Colucci+, 2014)J/AJ/152/45 : LAMOST survey of star clusters in M31. II. (Chen+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/623/A65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/623/A65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/623/A65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/623/A65https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/623/A65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/623/A65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/623/A65/table1 (BATC intermediate-band photometry of 53 GCs in M31)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/623/A65/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/623/A65/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/623/A65/table1?GETtext/xml+votable180.050000true8.587023341.79756920.005555555555555556Cone search capability for table J/A+A/623/A65/table2 (GALEX, SDSS, and 2MASS NIR photometry of 53 GCs in M31)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/623/A65/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/623/A65/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/623/A65/table2?GETtext/xml+votable180.050000true8.587023341.79756920.0055555555555555565/676 6/2589 2597-2598 2607 2610-2613 2616 2618-2620 2622 2624 2656 2664-2665 2667-2668 2674 2681 2695 2710 2712-2713 2717 2752-2753 2755-27578.650015785639275e-20 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/623/A65?format=asciiUVOpticalInfrareddefaultJ/A+A/623/A65/table1BATC intermediate-band photometry of 53 GCs in M31SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObjectGlobular cluster namemeta.id;meta.maincharamag? The magnitude in BATC a (337.15nm) bandmagphot.mag;em.opt.Ufloatnullablee_amag? 1 sigma uncertainty in BATC a (337.15nm) bandmagstat.error;phot.magfloatnullablebmag? The magnitude in BATC b (390.69nm) bandmagphot.mag;em.opt.Ufloatnullablee_bmag? 1 sigma uncertainty in BATC b (390.69nm) bandmagstat.error;phot.mag;em.opt.BfloatnullablecmagThe magnitude in BATC c (419.35nm) bandmagphot.mag;em.opt.Bfloate_cmag1 sigma uncertainty in BATC c (419.35nm) bandmagstat.error;phot.magfloatdmagThe magnitude in BATC d (454.00nm) bandmagphot.mag;em.opt.Bfloate_dmag1 sigma uncertainty in BATC d (454.00nm) bandmagstat.error;phot.magfloatemagThe magnitude in BATC e (492.50nm) bandmagphot.mag;em.opt.Bfloate_emag1 sigma uncertainty in BATC e (492.50nm) bandmagstat.error;phot.magfloatfmagThe magnitude in BATC f (526.68nm) bandmagphot.mag;em.opt.Vfloate_fmag1 sigma uncertainty in BATC f (526.68nm) bandmagstat.error;phot.magfloatgmagThe magnitude in BATC g (578.99nm) bandmagphot.mag;em.opt.Vfloate_gmag1 sigma uncertainty in BATC g (578.99nm) bandmagstat.error;phot.mag;em.opt.BfloathmagThe magnitude in BATC h (607.39nm) bandmagphot.mag;em.opt.Vfloate_hmag1 sigma uncertainty in BATC h (607.39nm) bandmagstat.error;phot.magfloatimagThe magnitude in BATC i (665.59nm) bandmagphot.mag;em.opt.Rfloate_imag1 sigma uncertainty in BATC i (665.59nm) bandmagstat.error;phot.mag;em.opt.IfloatjmagThe magnitude in BATC j (705.74nm) bandmagphot.mag;em.opt.Rfloate_jmag1 sigma uncertainty in BATC j (705.74nm) bandmagstat.error;phot.magfloatkmagThe magnitude in BATC k (754.63nm) bandmagphot.mag;em.opt.Rfloate_kmag1 sigma uncertainty in BATC k (754.63nm) bandmagstat.error;phot.magfloatmmag? The magnitude in BATC m (802.32nm) bandmagphot.mag;em.opt.Ifloatnullablee_mmag? 1 sigma uncertainty in BATC m (802.32nm) bandmagstat.error;phot.magfloatnullablenmag? The magnitude in BATC n (848.43nm) bandmagphot.mag;em.opt.Ifloatnullablee_nmag? 1 sigma uncertainty in BATC n (848.43nm) bandmagstat.error;phot.magfloatnullableomag? The magnitude in BATC o (918.22nm) bandmagphot.mag;em.opt.Ifloatnullablee_omag? 1 sigma uncertainty in BATC o (918.22nm) bandmagstat.error;phot.magfloatnullablepmag? The magnitude in BATC p (973.85nm) bandmagphot.mag;em.opt.Ifloatnullablee_pmag? 1 sigma uncertainty in BATC p (973.85nm) bandmagstat.error;phot.magfloatnullableRapPhotometric aperturearcsecstat.fit.paramfloat_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/A+A/623/A65/table2GALEX, SDSS, and 2MASS NIR photometry of 53 GCs in M31SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObjectGlobular cluster namemeta.id;meta.maincharFUVmag? The magnitude in GALEX FUV bandmagphot.mag;em.UV.100-200nmfloatnullablee_FUVmag? 1 sigma uncertainty in GALEX FUV band magnitudemagstat.error;phot.mag;em.UV.100-200nmfloatnullableNUVmag? The magnitude in GALEX NUV bandmagphot.mag;em.UV.200-300nmfloatnullablee_NUVmag? 1 sigma uncertainty in GALEX NUV band magnitudemagstat.error;phot.mag;em.UV.200-300nmfloatnullableumag? The magnitude in SDSS u bandmagphot.mag;em.opt.Ufloatnullablee_umag? 1 sigma uncertainty in SDSS u band magnitudemagstat.error;phot.mag;em.opt.Ufloatnullablegmag? The magnitude in SDSS g bandmagphot.mag;em.opt.Bfloatnullablee_gmag? 1 sigma uncertainty in SDSS g band magnitudemagstat.error;phot.mag;em.opt.Bfloatnullablermag? The magnitude in SDSS r bandmagphot.mag;em.opt.Rfloatnullablee_rmag? 1 sigma uncertainty in SDSS r band magnitudemagstat.error;phot.mag;em.opt.Rfloatnullableimag? The magnitude in SDSS i bandmagphot.mag;em.opt.Ifloatnullablee_imag? 1 sigma uncertainty in SDSS i band magnitudemagstat.error;phot.mag;em.opt.Ifloatnullablezmag? The magnitude in SDSS z bandmagphot.mag;em.opt.Ifloatnullablee_zmag? 1 sigma uncertainty in SDSS z band magnitudemagstat.error;phot.mag;em.opt.IfloatnullableJmag? The magnitude in 2MASS J bandmagphot.mag;em.IR.Jfloatnullablee_Jmag? 1 sigma uncertainty in 2MASS J band magnitudemagstat.error;phot.mag;em.IR.JfloatnullableHmag? The magnitude in 2MASS H bandmagphot.mag;em.IR.Hfloatnullablee_Hmag? 1 sigma uncertainty in 2MASS H band magnitudemagstat.error;phot.mag;em.IR.HfloatnullableKsmag? The magnitude in 2MASS Ks bandmagphot.mag;em.IR.Kfloatnullablee_Ksmag? 1 sigma uncertainty in 2MASS Ks band magnitudemagstat.error;phot.mag;em.IR.Kfloatnullable_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.main