Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios

Details Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358..587k&link_type=abstract

Astronomy and Astrophysics, v.358, p.587-592 (2000)

Astronomy and Astrophysics

Astrophysics

42

Line: Formation, Stars: Fundamental Parameters, Stars: Variables: Cepheids

Scientific paper

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 Teff for supergiants in the range 4700-6700 K.

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