Paper published in a book (Scientific congresses and symposiums)
A Comparison of Methods for Photospheric Abundance Determinations in K-Type Stars
Affer, L.; Micela, G.; Morel, Thierryet al.
2006 • In Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites, ESO ASTROPHYSICS SYMPOSIA. ISBN 978-3-540-34135-2. Springer-Verlag, 2006, p. 31
[en] We have performed a detailed abundance analysis of six inactive K-type stars using high-resolution optical spectra. We have used three different techniques and compared the results obtained in order to establish their respective merits and faults. The two spectroscopic methods give consistent results suggesting that non- LTE effects are small, whereas the â mixedâ spectroscopic-photometric method leads to photospheric parameters and abundances systematically lower than those obtained with the other two. We have also determined the starsâ positions in H-R diagrams and made a comparison between the gravities derived from the ionization equilibrium of the iron lines and from the evolutionary tracks: the agreement is reasonably good.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Affer, L.; INAF-Osservatorio Astr. di Palermo
Micela, G.; INAF-Osservatorio Astr. di Palermo
Morel, Thierry ; Osservatorio Astronomico di Palermo G. S. Vaiana, Istituto Nazionale di Astrofisica
Forcada, J. S.; Astrophysics Division â Research and Science Support Department of ESA, ESTEC
Favata, F.; Astrophysics Division â Research and Science Support Department of ESA, ESTEC
Language :
English
Title :
A Comparison of Methods for Photospheric Abundance Determinations in K-Type Stars
Publication date :
2006
Audience :
International
Main work title :
Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites, ESO ASTROPHYSICS SYMPOSIA. ISBN 978-3-540-34135-2. Springer-Verlag, 2006, p. 31
