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Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. II. Atomic Diffusion in M67 Stars

Souto, Diogo (författare)
Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.,National Observatory Brazil
Allende Prieto, C. (författare)
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)
Cunha, Katia (författare)
Observ 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
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Pinsonneault, Marc (författare)
Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University
Smith, Verne V. (författare)
Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory
Garcia-Dias, R. (författare)
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
Bovy, Jo (författare)
Univ 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
Garcia-Hernandez, D. A. (författare)
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
Holtzman, Jon (författare)
New Mexico State Univ, Las Cruces, NM 88003 USA.,New Mexico State University
Johnson, J. A. (författare)
Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University
Jönsson, Henrik (författare)
Lund 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
Majewski, Steve R. (författare)
Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia
Shetrone, Matthew (författare)
Univ Texas Austin, McDonald Observ, Austin, TX 78712 USA.,University of Texas at Austin
Sobeck, Jennifer (författare)
Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia
Zamora, Olga (författare)
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)
Pan, Kaike (författare)
Apache Point Observ, POB 59, Sunspot, NM 88349 USA.;New Mexico State Univ, POB 59, Sunspot, NM 88349 USA.,Apache Point Observatory
Nitschelm, Christian (författare)
Univ Antofagasta, Ctr Astron CITEVA, Ave Angamos 601, Antofagasta 883490059, Chile.,University of Antofagasta
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Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil National Observatory Brazil (creator_code:org_t)
2019-03-27
2019
Engelska.
Ingår i: Astrophysical Journal. - : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 874:1
Relaterad länk:
https://doi.org/10.3...
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https://repository.a...
http://dx.doi.org/10...
https://urn.kb.se/re...
https://doi.org/10.3...
https://lup.lub.lu.s...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Nyckelord

diffusion
infrared: stars
open clusters and associations: general
stars: abundances
diffusion
infrared: stars
open clusters and associations: general
stars: abundances

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ref (ämneskategori)
art (ämneskategori)

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