J/AJ/166/154ivo://CDS.VizieR/J/AJ/166/154doi:10.26093/cds/vizier.51660154CDSBrady K.E.Sneden C.Pilachowski C.A.Afsar M.Mace G.N.Jaffe D.T.,Gosnell N.M.Seifert R.2024-11-06T20:17:53Z2024-04-22T07:42:02ZCDS support team

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

cds-question@unistra.fropen-star-clusterschemical-abundancesinfrared-astronomyspectroscopyWe report on the first detailed infrared chemical analysis of five binary members (S277, S997, S975, S1031, and S1195) in the open cluster M67 (NGC2682). These stars are located outside (bluer and/or brighter than) the main- sequence turnoff region in M67. High-resolution (R~45000) near-infrared spectra were obtained with the Immersion GRating INfrared Spectrograph (IGRINS) at the McDonald Observatory 2.7m Harlan J. Smith Telescope, providing full spectral coverage of the H and K bands. The abundances of C, Na, Mg, Al, Si, S, Ca, Fe, and Ni are measured using neutral atomic absorption lines. We detect vsini>~25km/s in three of our program stars: S1031, S975, and S1195. We find our derived abundances to be in good agreement with turnoff star abundances, similar to published analyses of blue straggler stars in M67 from optical spectra. Detection of a carbon enhancement or depletion resulting from mass transfer is difficult due to the uncertainties in the carbon abundance and the relatively modest changes that may occur through red giant and asymptotic giant branch evolution.2023AJ....166..154Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/166/154CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/85/315 : F, G and K dwarf stars of the Pleiades (Soderblom+ 1993)J/AJ/109/1379 : Praesepe & M 67 spectral standards (Allen+ 1995)J/PASP/110/863 : A Stellar Spectral Flux Library: 1150 - 25000 A (Pickles 1998)J/A+A/360/499 : Equivalent widths of 9 stars of M 67 (Tautvaisiene+, 2000)J/A+A/382/899 : BVI photometry in M67 (Stassun+, 2002)J/A+A/418/509 : Chandra observation of M67 (Van Den Berg+, 2004)J/A+A/463/789 : Blue stragglers in open clusters (Ahumada+, 2007)J/A+A/497/497 : Physical parameters from JHK flux (Gonzalez-Hernandez+, 2009)J/A+A/511/A56 : Abundances of five open clusters (Pancino+, 2010)J/AJ/142/59 : Chemical abundance in 10 open clusters (Jacobson+, 2011)J/AJ/150/97 : Radial velocities in M67. I. 1278 candidates (Geller+, 2015)J/A+A/594/A43 : APOGEE/Kepler sample stars abundances (Hawkins+, 2016)J/A+A/585/A150 : On the metallicity of open clusters. III. (Netopil+, 2016)J/ApJ/865/44 : Abundances of evolved stars from IGRINS. I. (Afsar+, 2018)J/ApJ/869/9 : Machine-learning investigation of open cluster M67 (Gao, 2018)J/ApJS/238/29 : IGRINS spectral library (Park+, 2018)J/A+A/624/A8 : Evolved Galactic open clusters dynamical props (Angelo+, 2019)J/ApJ/874/97 : Chemical abundances from APOGEE. II. M67 stars (Souto+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/166/154https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/166/154http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/166/154https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/166/154https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/166/154http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/166/154GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/166/154/table2Line ListrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElementAtomic Linemeta.id;spect.linecharlambda[15094/22538] Vacuum wavelength; Angstroms0.1nmem.wldoublechi[1.89/9.83] Excitation potentialeVphys.atmol.excitationfloatloggf[-1.52/0.86] log of statistical weight of lower energy level times oscillator strength of transitionstat.weight;phys.atmol.oscStrength;phys.atmol.levelfloatr_chi[1/2] Reference for chi (1)meta.ref;pos.frameint