Issue |
Astron. Astrophys. Suppl. Ser.
Volume 133, Number 2, December I 1998
|
|
---|---|---|
Page(s) | 221 - 226 | |
DOI | https://doi.org/10.1051/aas:1998456 | |
Published online | 15 December 1998 |
On-line determination of stellar atmospheric parameters
,
, [Fe/H] from ELODIE echelle spectra*
II. The library of F5 to K7 stars
1
Observatoire de Bordeaux, BP. 89, 33270 Floirac, France
2
Observatoire de Paris, DASGAL, 61 avenue de l'Observatoire, 75014 Paris, France
Send offprint request to: C. Soubiran
Received:
20
April
1998
Accepted:
12
June
1998
A library of 211 echelle spectra taken with ELODIE at the Observatoire de
Haute-Provence is presented. It provides a
set of spectroscopic standards covering the full range of gravities and metallicities in
the effective temperature interval [4000 K, 6300 K].
The spectra are straightened, wavelength calibrated, cleaned of cosmic
ray hits, bad pixels and telluric lines. They
cover the spectral range
[440 nm, 680 nm] with an instrumental resolution of 42000. For each star, basic
data were compiled from the Hipparcos catalogue and the Hipparcos Input Catalogue.
Radial
velocities with a precision better than 100 are given.
Atmospheric parameters (
,
, [Fe/H]) from the
literature are discussed. Because of scattered determinations in the
bibliography, even for the most well-known stars, these parameters were
adjusted by an iterative process which takes account of common or different
spectral features between the standards, using our homogeneous set of
spectra. Revised values of effective temperature, gravity and metallicity
are proposed. They are still consistent with the literature, and also lead
to the self-consistency of the library, in the sense that similar spectra
have similar atmospheric parameters. This adjustment was performed by using
step by step a method based on the least square comparison of carefully
prepared spectra, which was originally developed for the on-line estimation
of the atmospheric parameters of faint field stars (companion paper in the
main journal).
Key words: atlases / stars: abundances / stars: atmospheres / stars: fundamental parameters
© European Southern Observatory (ESO), 1998