J/AJ/151/49ivo://CDS.VizieR/J/AJ/151/49doi:10.26093/cds/vizier.51510049CDSKilicoglu T.Monier R.Richer J.Fossati L.Albayrak B.2018-05-16T07:02:08Z2018-03-21T08:00:35ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomybroad-band-photometryradial-velocityeffective-temperaturestellar-masseschemical-abundancesWe present here the first abundance analysis of 44 late B-, A-, and F-type members of the young open cluster M6 (NGC 6405, age about 75 Myr). Low- and medium-resolution spectra, covering the 4500-5840 {AA} wavelength range, were obtained using the FLAMES/GIRAFFE spectrograph attached to the ESO Very Large Telescopes. We determined the atmospheric parameters using calibrations of the Geneva photometry and by adjusting the H_{beta}_ profiles to synthetic ones. The abundances of up to 20 chemical elements, from helium to mercury, were derived for 19 late B, 16 A, and 9 F stars by iteratively adjusting synthetic spectra to the observations. We also derived a mean cluster metallicity of [Fe/H]=0.07+/-0.03 dex from the iron abundances of the F-type stars. We find that for most chemical elements, the normal late B- and A-type stars exhibit larger star-to-star abundance variations than the F-type stars probably because of the faster rotation of the B and A stars. The abundances of C, O, Mg, Si, and Sc appear to be anticorrelated with that of Fe, while the opposite holds for the abundances of Ca, Ti, Cr, Mn, Ni, Y, and Ba as expected if radiative diffusion is efficient in the envelopes of these stars. In the course of this analysis, we discovered five new peculiar stars: one mild Am, one Am, and one Fm star (HD 318091, CD-32 13109, GSC 07380-01211, CP1), one HgMn star (HD 318126, CP3), and one He-weak P-rich (HD 318101, CP4) star. We also discovered a new spectroscopic binary, most likely a SB2. We performed a detailed modeling of HD 318101, the new He-weak P-rich CP star, using the Montreal stellar evolution code XEVOL which self-consistently treats all particle transport processes. Although the overall abundance pattern of this star is properly reproduced, we find that detailed abundances (in particular the high P excess) resisted modeling attempts even when a range of turbulence profiles and mass-loss rates were considered. Solutions are proposed which are still under investigation.2016AJ....151...49Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/49CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/446/949 : Open clusters proper motions based on UCAC2 (Dias+, 2006)J/A+A/454/171 : CCD {Delta}a-photometry of 8 open clusters (Paunzen+, 2006)J/AJ/136/118 : Open clusters as galactic disk tracers. I. (Frinchaboy+, 2008)J/A+A/539/A143 : Nearby B-stars stellar parameters and abundanceshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/49https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/49http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/49https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/49https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/49http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/49GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/151/49/table3 (List of Selected Targets)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/151/49/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/151/49/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/151/49/table3?GETtext/xml+votable180.050000true264.8697139-32.20727690.0055555555555555566/28806 28807 288123.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/151/49?format=asciiOpticaldefaultJ/AJ/151/49/table3List of Selected TargetsStarStar designationmeta.id;meta.maincharprimaryn_Star[SB2 var] Note on Star (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullableVmag[8.26/12.69] V-band magnitudemagphot.mag;em.opt.VfloatPMemb-D[0/63]? Membership probability from Dias et al. 2006 (J/A+A/446/949)%statintnullablePMemb-FM[1.1/97.1]? Membership probability from Frinchaboy & Majewski 2008 (J/AJ/136/118)%statfloatnullableRV-FM[-71.71/55.26]? Radial velocity from Frinchaboy & Majewski 2008 (J/AJ/136/118)km/sphys.veloc;pos.heliocentricfloatnullablee_RV-FM[2.58/7.76]? Uncertainty in RV-FMkm/sstat.errorfloatnullableRV[-14.38/6.76]? Radial velocity from this studykm/sphys.veloc;pos.heliocentricfloatnullablee_RV[0.23/18.18]? Uncertainty in RVkm/sstat.errorfloatnullableHR[Yes --- No] HR diagram membership?meta.code.membercharS/N1[34/653] Signal-to-noise ratio of first observationobs.param;obsintS/N2[78/686] Signal-to-noise ratio of second observationobs.param;obsintS/N3[51/539] Signal-to-noise ratio of third observationobs.param;obsintmoreIndicates stellar data in other tablesmeta.ref.urlcharSimbadSimbad 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/AJ/151/49/table4Log L/L_{sun}_, log T_eff_ , M/M_{sun}_, and Fractional Age ({tau}) for the MembersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designationmeta.id;meta.maincharNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullablelogL[0.21/2.49] Log luminosity relative to solarlog(solLum)phys.luminosityfloatlogTeff[3.813/4.188] Log effective temperaturelog(K)phys.temperature.effectivefloatMass[1.24/4.33] Stellar mass relative to solarsolMassphys.massfloate_Mass[0.04/0.43] Uncertainty in MasssolMassstat.error;phys.massfloattau[0.02/0.65] Fractional stellar age {tau}time.agefloate_tau[0.01/0.17] Uncertainty in taustat.errorfloatJ/AJ/151/49/table5Fundamental Parameters for the Program StarsVturb[0/2.7]? Derived microturbulent velocitykm/sphys.velocfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designationmeta.id;meta.maincharn_Star[s] Note on Star (1)meta.notecharNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullableTeff[6045/15864]? Photometric effective temperature derived from Geneva seven-color photometryKphys.temperature.effectiveintnullablen_Teff[)] Note on Teff (2)meta.notecharlogg[3.22/4.76]? Surface gravity derived from Geneva seven-color photometry (dex)log(cm.s**-2)phys.gravityfloatnullableTeffF[6500/15400] Final adopted effective temperatureKphys.temperature.effectiveinte_TeffF[100/500] Uncertainty in TeffFKstat.errorintloggF[3.50/4.80]? Final adopted surface gravity (dex)log(cm.s**-2)phys.gravityfloatnullablee_loggF[0.10/0.50]? Uncertainty in loggFlog(cm.s**-2)stat.errorfloatnullablen_loggF[)] Note on loggF (2)meta.notecharvsini[5.1/310]? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini[0.5/25]? Uncertainty in vsinikm/sstat.error;phys.veloc.rotatfloatnullableSpTypeSpectral typesrc.spTypecharJ/AJ/151/49/table7Log(X/H) Absolute Abundances for the M6 DwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designationmeta.id;meta.maincharNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullable[He/H][-1.55/0]? Absolute He abundancephys.abund.Yfloatnullable[C/H][-3.82/0]? Absolute C abundancephys.abundfloatnullable[O/H][-3.4/0]? Absolute O abundancephys.abundfloatnullable[Mg/H][-4.65/0]? Absolute Mg abundancephys.abundfloatnullable[Si/H][-5.02/0]? Absolute Si abundancephys.abundfloatnullable[P/H][-4.88/0]? Absolute P abundancephys.abundfloatnullable[S/H][-5.32/0]? Absolute S abundancephys.abundfloatnullable[Ar/H][-5.13/0]? Absolute Ar abundancephys.abundfloatnullable[Ca/H][-6.27/0]? Absolute Ca abundancephys.abundfloatnullable[Sc/H][-9.41/0]? Absolute Sc abundancephys.abundfloatnullable[Ti/H][-7.2/0]? Absolute Ti abundancephys.abundfloatnullable[Cr/H][-6.38/0]? Absolute Cr abundancephys.abundfloatnullable[Mn/H][-6.7/0]? Absolute Mn abundancephys.abundfloatnullable[Fe/H][-4.84/0]? Absolute Fe abundancephys.abund.Fefloatnullable[Ni/H][-5.84/0]? Absolute Ni abundancephys.abundfloatnullable[Y/H][-9.78/0]? Absolute Y abundancephys.abundfloatnullable[Zr/H][-6.1/0]? Absolute Zr abundancephys.abundfloatnullable[Xe/H][-5.98/0]? Absolute Xe abundancephys.abundfloatnullable[Ba/H][-9.97/0]? Absolute Ba abundancephys.abundfloatnullable[Hg/H][-5.69/0]? Absolute Hg abundancephys.abundfloatnullableJ/AJ/151/49/table8*Abundances for the M6 DwarfsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designationmeta.id;meta.maincharNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullable[He/H][-0.54/0.07]? He abundancephys.abund.Yfloatnullable[C/H][-0.15/0.6]? C abundancephys.abundfloatnullable[O/H][-0.16/0.15]? O abundancephys.abundfloatnullable[Mg/H][-0.21/0.95]? Mg abundancephys.abundfloatnullable[Si/H][-0.52/0.31]? Si abundancephys.abundfloatnullable[Fe/H][-0.36/0.32]? Fe abundancephys.abund.FefloatnullableJ/AJ/151/49/table14Radial Velocity VariationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar designationmeta.id;meta.maincharNum[5/130]? Star identification number from Rohlfs et al. (1959ZA.....47...15R)meta.idintnullableRV1[-11.89/18.31] Radial velocity at MJD 54250.3494km/sspect.dopplerVelocfloatRV2[-20.1/-0.37] Radial velocity at MJD 54256.1309km/sspect.dopplerVelocfloatDRV[0.07/38.41] Radial velocity differencekm/sspect.dopplerVeloc;arith.difffloatVar[Yes No] Radially variable?meta.code;src.varchar