Astronomical School’s Report, 2009, Volume 6, Issue 2, Pages 151–154

https://doi.org/10.18372/2411-6602.06.2151
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UDC 524.31.01

Lines of iron as luminosity indicators for F-, G-, K-supergiants

Chekhonadskikh F.A.

Odessa National University, Ukraine

Abstract

We have achieved more than 80 high-precision relations between Mv, Teff and iron line-depths ratios. These relations have been used for the estimation of the absolute magnitudes Mv for 43 FGK supergiants with an error 0.05m–0.25m. The program code based on our relations allows determining absolute magnitudes for supergiants and classical Cepheids of F0–G0 spectral classes and I–II luminosity classes.

Keywords:

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