A Study on the Stellar Physical Parameters

Details A Study on the Stellar Physical Parameters A Study on the Stellar Physical Parameters

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pkas....8..243l&link_type=abstract

Publications of the Korean Astronomical Society, vol.8, no.1, p.243-263

Astronomy and Astrophysics

Astronomy

Scientific paper

One hundred forty two digital spectra of 110 standard stars with 1A resolution in 3900A~4150A region were analyzed to determine the spectral indices sensitive to the atmospheric parameters. The standard stars cover the temperature in the range of Teff from ~4400K to ~7000K and the surface gravity in the range of log g from 0 to 5 and the metal abundance [Fe/H] from ~2.7 to 0.4. We have derived physical parameters, theta(=T/5040), log g, and [Fe/H] for the standard stars using indices, P(38/93), Fe I(A), Fe I(B), SrII, and H delta, with overall accuracies of 0.067, 0.617, and 0.466, respectively. However for some region of spectral type and metallicity, those can be obtained with better accuracies. Those indices are found to be useful especially for stellar gravity determination.

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