Hostname: page-component-6bf8c574d5-xtvcr Total loading time: 0 Render date: 2025-02-22T23:33:18.657Z Has data issue: false hasContentIssue false
  • English
  • Français

NLTE Iron abundance determination in Red Giants

Published online by Cambridge University Press:  19 December 2013

R. Ezzeddine ,
T. Merle  and
B. Plez
R. Ezzeddine
Affiliation:
Laboratoire Univers et Particules de Montpellier (LUPM), Université de Montpellier 2, CNRS, France
T. Merle
Affiliation:
Institut d'Astronomie et Astrophysique, Université Libre de Bruxelles, Belgique
B. Plez
Affiliation:
Laboratoire Univers et Particules de Montpellier (LUPM), Université de Montpellier 2, CNRS, France
Get access

Abstract

Our aim is to perform Non-LTE iron abundance calculations on a sample of Kepler red giants with reliable fundamental atmospheric parameters from asteroseismology, specifically log g, in order to calibrate for unknown atomic collisional effects with neutral hydrogen for which quantum mechanical data does not yet exist. Preliminary results show better mutual agreement between FeI and FeII lines as compared to LTE, as well as less FeI abundance dispersion than that of previous work.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 63: New Advances in Stellar Physics: From Microscopic to Macroscopic Processes , 2013 , pp. 407 - 409
Copyright
© EAS, EDP Sciences, 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alvarez, R. , & Plez, B. , 1998, A&A, 330, 1109
Asplund, M. , 2005, ARA&A, 43, 481CrossRef
Barklem, P.S. , et al., 2011, A&A, 530, A94
Belyaev, A.K. , Barklem, P.S. , 2003, Phys. Rev. A, 68, 062703CrossRef
Bergemann, M. , et al., 2012, MNRAS, 427, 27CrossRef
Bruntt, H. , et al., 2011, A&A, 528, 121
Carlsson, M. , 1986, Uppsala Astronomical Observatory Reports, 33
Drawin, H.W. , 1969, Z. Phys., 225, 483CrossRef
Gehren, T. , et al., 2001, A&A, 366, 981
Gustafsson, B. , et al., 2008, A&A, 486, 951
Mashonkina, L. , et al., 2011, A&A, 528, 87
Plez, B. , 2012, Turbospectrum: Code for spectral synthesis, Astrophysics Source Code Library
Thevenin, F. , & Idiart, T.P. , 1999, ApJ, 521, 753CrossRef
Thygesen, A.O. , et al., 2012, A&A, 543, 160