SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Teske Johanna)
 

Sökning: WFRF:(Teske Johanna) > (2018) > Chemical Abundances...

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

Souto, Diogo (författare)
Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil.,National Observatory Brazil
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.,National Observatory Brazil,University of Arizona
Smith, Verne V. (författare)
Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory
visa fler...
Allende Prieto, C. (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
Garcia-Hernandez, D. A. (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)
Pinsonneault, Marc (författare)
Ohio State Univ, Dept Astron, 174 W 18Th Ave, Columbus, OH 43210 USA.,Ohio State University
Holzer, Parker (författare)
Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.,University of Utah
Frinchaboy, Peter (författare)
Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA.,Texas Christian University
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, Steven 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
Stringfellow, Guy (författare)
Univ Colorado, Dept Astrophys & Planetary Sci, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA.,University of Colorado
Teske, Johanna (författare)
Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 USA.,Carnegie Institution for Science
Zamora, Olga (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
Zasowski, Gail (författare)
Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA.,University of Utah
Carrera, Ricardo (författare)
INAF Osservatorio Astron Padova, Padua, Italy.,INAF - Osservatorio Astronomico di Padova
Stassun, Keivan (författare)
Vanderbilt Univ, Dept Phys & Astron, VU Stn 1807, Nashville, TN 37235 USA.,Vanderbilt University
Fernandez-Trincado, J. G. (författare)
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
Villanova, Sandro (författare)
Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.,University of Concepción
Minniti, Dante (författare)
Pontificia Univ Catolica Chile, Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.,Pontifical Catholic University of Chile
Santana, Felipe (författare)
Univ Chile, Av Libertador Bernardo OHiggins 1058, Santiago, Chile.,University of Chile
visa färre...
Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil National Observatory Brazil (creator_code:org_t)
2018-04-09
2018
Engelska.
Ingår i: Astrophysical Journal. - : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 857:1
Relaterad länk:
https://doi.org/10.3...
visa fler...
https://repository.a...
http://dx.doi.org/10...
https://urn.kb.se/re...
https://doi.org/10.3...
https://lup.lub.lu.s...
visa färre...
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • 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.

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

Publikations- och innehållstyp

ref (ämneskategori)
art (ämneskategori)

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy