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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. II. Atomic Diffusion in M67 Stars

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019-03-27
  • Institute of Physics Publishing (IOPP),2019
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:mau-65195
  • https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-65195URI
  • https://doi.org/10.3847/1538-4357/ab0b43DOI
  • https://lup.lub.lu.se/record/94c0c770-b2db-4823-994a-ef461c67c30bURI

Supplementary language notes

  • Language:English
  • Summary in:English

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

Notes

  • Chemical abundances for 15 elements (C, N, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, and Ni) are presented for 83 stellar members of the 4 Gyr old solar-metallicity open cluster M67. The sample contains stars spanning a wide range of evolutionary phases, from G dwarfs to red clump stars. The abundances were derived from near-IR (lambda 1.5-1.7 mu m) high-resolution spectra (R = 22,500) from the SDSS-IV/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey. A 1D local thermodynamic equilibrium abundance analysis was carried out using the APOGEE synthetic spectral libraries, via chi(2) minimization of the synthetic and observed spectra with the qASPCAP code. We found significant abundance differences (similar to 0.05-0.30 dex) between the M67 member stars as a function of the stellar mass (or position on the Hertzsprung-Russell diagram), where the abundance patterns exhibit a general depletion (in [X/H]) in stars at the main-sequence turnoff. The amount of the depletion is different for different elements. We find that atomic diffusion models provide, in general, good agreement with the abundance trends for most chemical species, supporting recent studies indicating that measurable atomic diffusion operates in M67 stars.

Subject headings and genre

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

  • Allende Prieto, C.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)
  • 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.,University of Arizona,National Observatory Brazil (author)
  • Pinsonneault, MarcOhio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University (author)
  • Smith, Verne V.Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory (author)
  • Garcia-Dias, R.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)
  • Bovy, JoUniv Toronto, Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada.;Univ Toronto, Dunlap Inst Astron & Astrophys, Toronto, ON M5S 3H4, Canada.,University of Toronto (author)
  • Garcia-Hernandez, D. A.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)
  • Holtzman, JonNew Mexico State Univ, Las Cruces, NM 88003 USA.,New Mexico State University(Swepub:lu)jo6205ho (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, Steve 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)
  • Zamora, OlgaInst 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)
  • Pan, KaikeApache Point Observ, POB 59, Sunspot, NM 88349 USA.;New Mexico State Univ, POB 59, Sunspot, NM 88349 USA.,Apache Point Observatory (author)
  • Nitschelm, ChristianUniv Antofagasta, Ctr Astron CITEVA, Ave Angamos 601, Antofagasta 883490059, Chile.,University of Antofagasta (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)874:10004-637X1538-4357

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