Available formats: HTML | PDF | (gzipped) PostScript
Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios
V.V. Kovtyukh and
Received 12 November 1999 / Accepted 21 January 2000
The ratios of spectral line-depths are powerful indicators of the effective temperature. Thirty-two functional formulas to estimate the effective temperatures from line-depth ratios for Cepheids and F-G supergiants are offered. For high-quality spectra we find errors in the temperature as small as 10-15 K. These calibrations are only little sensitive to other stellar parameters and allow to derive highly precise for supergiants in the range 4700-6700 K.
Key words: line: formation stars: fundamental parameters stars: variables: Cepheids
© European Southern Observatory (ESO) 2000
Online publication: June 8, 2000