SIMBAD references

2003A&A...398.1121E - Astronomy and Astrophysics, volume 398, 1121-1135 (2003/2-2)

Automated spectroscopic abundances of A and F-type stars using echelle spectrographs II. Abundances of 140 A-F stars from ELODIE and CORALIE.

ERSPAMER D. and NORTH P.

Abstract (from CDS):

Using the method presented in Erspamer & North (2002A&A...383..227E, 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 km/s. There is no correlation between abundances and Vsin 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, 1986A&A...155..371H) 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 Vsin suggested by Varenne & Monier (1999A&A...351..247V) is not confirmed. The predictions of the Montreal models (e.g. Richard et al., 2001ApJ...558..377R) are not fulfilled in general. However, a correlation between [(Fe)/(H)] and logg is found for stars of 1.8 to 2.0M. Various possible causes are discussed, but the physical reality of this correlation seems inescapable.

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Journal keyword(s): techniques: spectroscopic - stars: abundances - stars: chemically peculiar - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/398/1121): table5.dat table6.dat>

Simbad objects: 140

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