EDP Sciences
Free Access
Issue
A&A
Volume 398, Number 3, February II 2003
Page(s) 1121 - 1135
Section Formation and evolution of planetary systems
DOI https://doi.org/10.1051/0004-6361:20021711
Published online 28 January 2003


A&A 398, 1121-1135 (2003)
DOI: 10.1051/0004-6361:20021711

Automated spectroscopic abundances of A and F-type stars using echelle spectrographs

II. Abundances of 140 A-F stars from ELODIE and CORALIE
D. Erspamer and P. North

Institut d'astronomie de l'Université de Lausanne, 1290 Chavannes-des-Bois, Switzerland
(Received 14 June 2002 / Accepted 26 August 2002)

Abstract
Using the method presented in Erspamer & North (2002, hereafter Paper I), detailed abundances of 140 stars are presented. The uncertainties characteristic of this method are presented and discussed. In particular, we show that for a  S/N ratio higher than 200, the method is applicable to stars with a rotational velocity as high as 200  ${\rm km~s^{-1}}$. There is no correlation between abundances and $V\sin{i}$, except a spurious one for Sr, Sc and Na which we explain by the small number of lines of these elements combined with a locally biased continuum. Metallic giants (Hauck 1986) show larger abundances than normal giants for at least 8 elements: Al, Ca, Ti, Cr, Mn, Fe, Ni and Ba. The anticorrelation for Na, Mg, Si, Ca, Fe and Ni with $V\sin{i}$ suggested by Varenne & Monier (1999) is not confirmed. The predictions of the Montréal models (e.g. Richard et al. 2001) are not fulfilled in general. However, a correlation between $\left[\frac{{\rm Fe}}{{\rm H}}\right]$ and $\log{g}$is found for stars of 1.8 to 2.0  $M_\odot$. Various possible causes are discussed, but the physical reality of this correlation seems inescapable.


Key words: techniques: spectroscopic -- stars: abundances -- stars: chemically peculiar -- stars: fundamental parameters

Offprint request: P. North, Pierre.North@obs.unige.ch

SIMBAD Objects
Tables at the CDS



© ESO 2003

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.