J/ApJ/903/110ivo://CDS.VizieR/J/ApJ/903/110doi:10.26093/cds/vizier.19030110CDSKo Y.Lee M.G.Park H.S.Sohn J.Lim S.Hwang N.Park B.-G.2023-03-10T05:46:05Z2022-02-22T06:37:21ZCDS support team

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

cds-question@unistra.frglobular-star-clustersphotometryvisible-astronomyspectroscopyinfrared-astronomyradial-velocityWe present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8kpc<R<160kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g-i)0 colors. All GC subpopulations have mean ages of about 10Gyr, but showing differences in metallicities. The BGCs and RGCs are the most metal-poor ([Z/H]~-1.49) and metal-rich ([Z/H]~-0.45), respectively, and the GGCs are in between. We find that the inner GC system exhibits a strong overall rotation that is entirely due to a disklike rotation of the RGC system. The BGC system shows little rotation. The GGCs show kinematic properties clearly distinct among the GC subpopulations, having higher mean velocities than the BGCs and RGCs and being aligned along the major axis of M85. This implies that the GGCs have an origin different from the other GC subpopulations. The rotation-corrected velocity dispersion of the RGC system is much lower than that of the BGC system, indicating the truncation of the red halo of M85. The BGCs have a flat velocity dispersion profile out to R=67kpc, reflecting the dark matter extent of M85. Using the velocity dispersion of the BGC system, we estimate the dynamical mass of M85 to be 3.8x1012M{sun}. We infer that M85 has undergone merging events lately, resulting in the peculiar kinematics of the GC system.2020ApJ...903..110Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/903/110CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)J/ApJ/459/110 : Line strengths and gradients in S0 galaxies (Fisher+ 1996)J/AJ/113/950 : Kinematic Profiles of S0 Galaxies (Fisher 1997)J/ApJS/111/377 : H{gamma} & H{delta} absorption features (Worthey+ 1997)J/ApJS/116/1 : Old Stellar Populations. VI. Absorption-Line (Trager+ 1998)J/MNRAS/313/469 : Streaming motions of galaxy clusters. I. (Smith+, 2000)J/MNRAS/330/547 : Local galaxy ages and metallicities (Terlevich+, 2002)J/A+A/417/499 : Spectrophotometry of Virgo cluster galaxies (Gavazzi+, 2004)J/ApJS/164/334 : ACS Virgo Cluster Survey. VI (Ferrarese+, 2006)J/ApJS/182/216 : Surface photometry of Virgo ellipticals (Kormendy+, 2009)J/MNRAS/398/91 : 2D kinematic structure of early-type galaxies (Proctor+, 2009)J/ApJ/773/L27 : Globular clusters in ACSVCS early-type galaxies (Park+, 2013)J/MNRAS/428/389 : SLUGGS globular clusters in early-type galaxies (Pota+, 2013)J/MNRAS/442/3544 : Kinematic tracers in Umbrella galaxy (Foster+, 2014)J/ApJS/215/22 : The Extended Virgo Cluster Catalog (EVCC) (Kim+, 2014)J/MNRAS/446/120 : ATLAS3D project. XXIX (Duc+, 2015)J/ApJ/872/202 : CFHT ugi photometry of globular clusters in M85 (Ko+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/903/110https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/903/110http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/903/110https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/903/110https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/903/110http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/903/110GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/903/110/table2 (Spectroscopic and photometric properties of the GCs confirmed in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/110/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/110/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/110/table2?GETtext/xml+votable180.050000true185.8926088918.149978890.005555555555555556Cone search capability for table J/ApJ/903/110/table3 (Spectroscopic and photometric properties of foreground stars and background galaxies in the Hectospec field of M85)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/903/110/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/903/110/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/903/110/table3?GETtext/xml+votable180.050000true185.8351138918.2266450.0055555555555555566/28039 28044-28045 280562.4270961532559724e-19 2.8962881395294825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/903/110?format=asciiOpticalInfrareddefaultJ/ApJ/903/110/table2Spectroscopic and photometric properties of the GCs confirmed in this studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentificationmeta.id;meta.maincharRAJ2000[185/187] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[17.8/18.5] Declination (J2000)degpos.eq.dec;meta.mainimag[18.9/22] CFHT/MegaCam i band AB magnitudemagphot.mag;em.opt.Ifloate_imag[0.001/0.02] Error in imagmagstat.error;phot.magfloatg-i[0.61/1.05] (g-i) color index, CFHT/MegaCam AB systemmagphot.color;em.opt.B;em.opt.Ifloate_g-i[0.002/0.02] Error in g-imagstat.errorfloatC[0/0.37] Inverse concentration index (1)magspect.indexfloatRVel[351/1092] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_RVel[9/135] Error in RVelkm/sstat.error;spect.dopplerVelocintClassClassification (2)src.classcharJ/ApJ/903/110/table3Spectroscopic and photometric properties of foreground stars and background galaxies in the Hectospec field of M85recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentificationmeta.id;meta.maincharRAJ2000[185/187] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[17.6/18.6] Declination (J2000)degpos.eq.dec;meta.mainimag[17.9/22.2] CFHT/MegaCam i band AB magnitudemagphot.mag;em.opt.Ifloate_imag[0.001/0.02] Error in imagmagstat.error;phot.magfloatg-i[0.48/1.3] (g-i) color index, CFHT/MegaCam AB systemmagphot.color;em.opt.B;em.opt.Ifloate_g-i[0.001/0.03] Error in g-imagstat.errorfloatC[-0.04/0.56] Inverse concentration index (1)magspect.indexfloatRVel[-251/151120] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricinte_RVel[4/131] Error in HRVkm/sstat.error;spect.dopplerVelocint