Free Access
Astron. Astrophys. Suppl. Ser.
Volume 139, Number 1, October I 1999
Page(s) 63 - 68
Published online 15 October 1999
DOI: 10.1051/aas:1999379

Astron. Astrophys. Suppl. Ser. 139, 63-68

Metallicity calibration of a DDO CN index and other low-resolution indices for G and K stars

B.J. Taylor

Department of Physics and Astronomy, N283 ESC, Brigham Young University, Provo, UT 84602-4360, U.S.A.

Received March 26; accepted May 26, 1999


Metallicity calibrations of low-resolution parameters are potentially useful for (at least) two problems: the properties of moving groups, and the supermetallicity problem in K giants. In this paper, metallicity calibrations are derived for six sets of parameters. One of these parameters is the DDO CN index $\delta$CN. This parameter and three others are calibrated for use with evolved G and K stars. Two additional sets of low-resolution parameters are calibrated for use with G and K dwarfs. The calibrations are derived by comparing the input data with two catalogs of homogenized high-dispersion results from diverse authors (see Taylor 1995, 1999a). Using rms errors that are given in the catalogs, intrinsic rms errors are derived for metallicities deduced from the calibrations. The errors turn out to be comparable to those that apply for averaged high-dispersion results.

Key words: stars: abundances -- stars: fundamental parameters

SIMBAD Objects

Full Version in HTML
Postscript file (35 KB)
PDF File (192 KB)
Copyright The European Southern Observatory (ESO)

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.