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Peculiarities and Variations in the Optical Spectrum of the RV Tauri-type Star R Sct

Kipper, Tõnu; Klochkova, Valentina G.

We analyzed some new high resolution optical spectra of the semiregular RV Tauri-type star R Sct. Fundamental parameters were found to be T_eff=4500 K, log g=0.0 and ξ_t=4.0 km s^-1. The results of chemical analysis show that R Sct is a metal-poor star with [Fe/H]≈-0.5. The carbon content with respect to iron is signi…