J/AJ/154/57ivo://CDS.VizieR/J/AJ/154/57doi:10.26093/cds/vizier.51540057CDSHughes J.Lacy B.Sakari C.Wallerstein G.Davis C.E.Schiefelbein S.,Corrin O.Joudi H.Le D.Haynes R.M.2018-10-04T15:12:39Z2017-11-06T15:50:47ZCDS support team

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

cds-question@unistra.frglobular-star-clustersradial-velocityinfrared-photometryvisible-astronomybroad-band-photometrystellar-massesstellar-ageseffective-temperaturemetallicityWe present new SDSS and Washington photometry of the young outer-halo stellar system Segue 3. Combined with archival VI-observations, our most consistent results yield Z=0.006+/-0.001, log(Age)=9.42+/-0.08, (m-M)_0_=17.35+/-0.08, and E(B-V)=0.09+/-0.01, with a high binary fraction of 0.39+/-0.05 derived using the Padova models. We confirm that mass-segregation has occurred, supporting the hypothesis that this cluster is being tidally disrupted. A three-parameter King model yields a cluster radius of r_cl_=0.017{deg}+/-0.007{deg}, a core radius of r_c_=0.003{deg}+/-0.001{deg}, and a tidal radius of r_t_=0.04{deg}+/-0.02{deg}. A comparison of Padova and Dartmouth model-grids indicates that the cluster is not significantly {alpha}-enhanced, with a mean [Fe/H]=-0.55_-0.12_^+0.15^dex, and a population age of only 2.6+/-0.4Gyr. We rule out a statistically significant age spread at the main-sequence turnoff because of a narrow subgiant branch, and discuss the role of stellar rotation and cluster age, using Dartmouth and Geneva models: approximately 70% of the Seg 3 stars at or below the main-sequence turnoff have enhanced rotation. Our results for Segue 3 indicate that it is younger and more metal-rich than all previous studies have reported to date. From colors involving Washington C and SDSS-u filters, we identify several giants and a possible blue straggler for future follow-up spectroscopic studies, and we produce spectral energy distributions of previously known members and potential Segue 3 sources with Washington (CT_1_), Sloan (ugri), and VI-filters. Segue 3 shares the characteristics of unusual stellar systems that have likely been stripped from external dwarf galaxies as they are being accreted by the Milky Way, or that have been formed during such an event. Its youth, metallicity, and location are all inconsistent with Segue 3 being a cluster native to the Milky Way.2017AJ....154...57Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)J/MNRAS/439/788 : Stromgren and Washington photometry in Boo I (Hughes+, 2014)J/MNRAS/433/1966 : Segue 3 VI photometry (Ortolani+, 2013)J/ApJ/740/106 : Abundances of 4 red giants in Pal 1 (Sakari+, 2011)J/AJ/142/88 : Segue 3 photometric and kinematic data (Fadely+, 2011)J/AJ/136/2321 : Washington photometry of Bootes I stars (Hughes+, 2008)J/AJ/134/229 : CT1T2 Photometry of red giants in globulars (Hughes+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/57https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/154/57/objects (Cross-identification (table2) and photometry (table3) of objects in the Segue 3 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/57/objects?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/57/objects?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/57/objects?GETtext/xml+votable180.050000true320.38437519.090971940.005555555555555556Cone search capability for table J/AJ/154/57/table5 (Input for Hertzsprung-Russell (H-R) diagrams for the photometric above the Main-Sequence TurnOff (MSTO))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/154/57/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/154/57/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/154/57/table5?GETtext/xml+votable180.050000true320.384519.09780610.0055555555555555566/126872.040811542443644e-19 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/154/57?format=asciiInfraredOpticaldefaultJ/AJ/154/57/objectsCross-identification (table2) and photometry (table3) of objects in the Segue 3 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObject[2/304] Internal identifier (ID)meta.id;meta.mainintSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharO13Data from Ortolani+ 2013, J/MNRAS/433/1966 within 1.5"meta.ref.urlcharF11Data from Fadely+ 2011, J/AJ/142/88 within 1.5"meta.ref.urlcharZIndicates metallicity (Z), age, effective temperature, luminosity, and mass (table5)meta.ref.urlcharSDSSSDSS DR13 identifiermeta.idcharf_SDSSPhotometric quality grade on SDSS (A, B, C, D, F, or G) (1)meta.codecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainXpix[17.9/898.9] X pixel coordinate (X_C_) (2)pixpos.cartesian.xfloatYpix[6/732.78] Y pixel coordinate (Y_C_) (2)pixpos.cartesian.yfloatHRV[-353.7/28.8]? Radial velocity from (Fadely+, 2011, J/AJ/142/88) (V_r_)km/sspect.dopplerVelocfloatnullableImag[14.27/23.45]? Apparent I band magnitude (I_O13_) (3)magphot.mag;em.opt.IfloatnullableVmag[15.19/24.23]? Apparent V band magnitude (V_O13_) (3)magphot.mag;em.opt.VfloatnullableT1mag[14/23.79] Apparent T_1_ band magnitude (4)magphot.mag;em.opt.Rfloate_T1mag[0.004/0.1] The 1{sigma} uncertainty in T1magmagstat.error;phot.magfloatCmag[15.15/26.2] Apparent C band magnitude (4)magphot.mag;em.opt.Ufloate_Cmag[0.007/0.54] The 1{sigma} uncertainty in Cmagmagstat.error;phot.magfloatumag[16.55/25.75] Apparent u band magnitude (4)magphot.mag;em.opt.Ufloate_umag[0.009/0.59] The 1{sigma} uncertainty in umagmagstat.error;phot.mag;em.opt.Ufloatgmag[14.61/25.54] Apparent g band magnitude (4)magphot.mag;em.opt.Bfloate_gmag[0.004/0.38] The 1{sigma} uncertainty in gmagmagstat.error;phot.mag;em.opt.Bfloatrmag[13.92/24.3] Apparent r band magnitude (4)magphot.mag;em.opt.Rfloate_rmag[0.01/0.2] The 1{sigma} uncertainty in rmagmagstat.error;phot.mag;em.opt.Rfloatimag[13.86/35.77] Apparent i band magnitude (4)magphot.mag;em.opt.Ifloate_imag[0.017/0.27] The 1{sigma} uncertainty in imagmagstat.error;phot.mag;em.opt.Ifloatzmag[14/23.1]? Apparent SDSS DR13 catalog z band magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0.01/0.95]? The 1{sigma} uncertainty in zmagmagstat.error;phot.mag;em.opt.IfloatnullableJ/AJ/154/57/table1Frames usedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of the observationtime.epochnullableImagerImager used in observation (ARCTIC or SPICam) (1)meta.id;instrcharFilterFilter used in observation (C, R, u, g, r, or i) (2)instr.setup;obscharTexp[30/1800] Exposure timestime.duration;obs.exposureintAirmass[1/2.37] Effective airmassobs.airMassfloatFWHM[0.5/1.7] Image Full-Width at Half-Maximumarcsecphys.angSizefloatJ/AJ/154/57/table5Input for Hertzsprung-Russell (H-R) diagrams for the photometric above the Main-Sequence TurnOff (MSTO)Z[0.004/0.005] Metallicityphys.abund.ZfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObject[6/273] Internal identifier (ID)meta.id;meta.mainintf_Object[a] Flag on Object (1)meta.codecharlogA[5.1/9.5] Log of age log(Age)time.agefloatf_logA[b] Flag on logA (1)meta.codecharlogT[3.68/4.1] Log of effective temperature (logT_eff_)log(K)phys.temperature.effectivefloatlogL[0.86/2.28] Log of luminosity (logL/L_{Sun}_)log(Sun)phys.luminosityfloatlogg[2.35/4.31] Log of surface gravityphys.gravityfloatMass[1.32/2.63] Mass (M/M_{Sun}_)log(Sun)phys.massfloatComCommentsmeta.notecharF11Data from Fadely+ 2011, J/AJ/142/88 within 1.5"meta.ref.urlchar_RAPosition from Table2 (right ascension part)degpos.eq.ra;meta.main_DEPosition from Table2 (declination part)degpos.eq.dec;meta.main