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  • Souto, DiogoObserv Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.,National Observatory Brazil (author)

Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. I. Signatures of Diffusion in the Open Cluster M67

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018-04-09
  • Institute of Physics Publishing (IOPP),2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:mau-65208
  • https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-65208URI
  • https://doi.org/10.3847/1538-4357/aab612DOI
  • https://lup.lub.lu.se/record/fa3e08d2-eb49-4ef9-9355-761b554edc88URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Detailed chemical abundance distributions for 14 elements are derived for eight high-probability stellar members of the solar metallicity old open cluster M67 with an age of similar to 4 Gyr. The eight stars consist of four pairs, with each pair occupying a distinct phase of stellar evolution: two G dwarfs, two turnoff stars, two G subgiants, and two red clump (RC) K giants. The abundance analysis uses near-IR high-resolution spectra (lambda 1.5-1.7 mu m) from the Apache Point Observatory Galactic Evolution Experiment survey and derives abundances for C, N, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, and Fe. Our derived stellar parameters and metallicity for 2M08510076+1153115 suggest that this star is a solar twin, exhibiting abundance differences relative to the Sun of <= 0.04 dex for all elements. Chemical homogeneity is found within each class of stars (similar to 0.02 dex), while significant abundance variations (similar to 0.05-0.20 dex) are found across the different evolutionary phases; the turnoff stars typically have the lowest abundances, while the RCs tend to have the largest. Non-LTE corrections to the LTE-derived abundances are unlikely to explain the differences. A detailed comparison of the derived Fe, Mg, Si, and Ca abundances with recently published surface abundances from stellar models that include chemical diffusion provides a good match between the observed and predicted abundances as a function of stellar mass. Such agreement would indicate the detection of chemical diffusion processes in the stellar members of M67.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Cunha, KatiaObserv Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.;Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA.,National Observatory Brazil,University of Arizona (author)
  • Smith, Verne V.Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory (author)
  • Allende Prieto, C.Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias (author)
  • Garcia-Hernandez, D. A.Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,Instituto de Astrofísica de Canarias,University of La Laguna (ULL) (author)
  • Pinsonneault, MarcOhio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University (author)
  • Holzer, ParkerUniv Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.,University of Utah (author)
  • Frinchaboy, PeterTexas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA.,Texas Christian University (author)
  • Holtzman, JonNew Mexico State Univ, Las Cruces, NM 88003 USA.,New Mexico State University (author)
  • Johnson, J. A.Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University (author)
  • Jönsson, HenrikLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-hkj (author)
  • Majewski, Steven R.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia (author)
  • Shetrone, MatthewUniv Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin (author)
  • Sobeck, JenniferUniv Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia (author)
  • Stringfellow, GuyUniv Colorado, Dept Astrophys & Planetary Sci, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA.,University of Colorado (author)
  • Teske, JohannaCarnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA.,Carnegie Institution for Science (author)
  • Zamora, OlgaInst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias (author)
  • Zasowski, GailUniv Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.,University of Utah (author)
  • Carrera, RicardoINAF Osservatorio Astron Padova, Padua, Italy.,INAF - Osservatorio Astronomico di Padova (author)
  • Stassun, KeivanVanderbilt Univ, Dept Phys & Astron, VU Stn 1807, Nashville, TN 37235 USA.,Vanderbilt University (author)
  • Fernandez-Trincado, J. G.Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.;Univ Bourgogne Franche Comte, OSU THETA, Observ Besancon, Inst Utinam,CNRS UMR6213, BP 1615, F-25010 Besancon, France.,University of Burgundy - Franche-Comté,University of Concepción (author)
  • Villanova, SandroUniv Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.,University of Concepción (author)
  • Minniti, DantePontificia Univ Catolica Chile, Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.,Pontifical Catholic University of Chile (author)
  • Santana, FelipeUniv Chile, Av Libertador Bernardo OHiggins 1058, Santiago, Chile.,University of Chile (author)
  • Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.National Observatory Brazil (creator_code:org_t)

Related titles

  • In:Astrophysical Journal: Institute of Physics Publishing (IOPP)857:10004-637X1538-4357

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