Abundance peculiarities in the atmosphere of SU Tauri

Details Abundance peculiarities in the atmosphere of SU Tauri Abundance peculiarities in the atmosphere of SU Tauri

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pazh....7..689o&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 7, Nov. 1981, p. 689-691.) Soviet Astronomy Letters, vol. 7, Nov.-Dec. 1981, p. 382, 38

Astronomy and Astrophysics

Astronomy

Abundance, Spectrum Analysis, Stellar Atmospheres, Stellar Spectra, Supergiant Stars, Variable Stars, Carbon, Electron Pressure, R Coronae Borealis Stars, Solar Atmosphere

Scientific paper

A quantitative analysis of the spectrum of SU Tau in the 3900-5000 A region as 28 A/mm dispersion is presented, using a spectrogram from the 6 m telescope of the Special Astrophysical Observatory of thy USSR Academy of Sciences. The analysis, carried out by the differential curve-of-growth method, used R CrB as the comparison star. It is found that the spectral type of SU Tau is G1, with a microturbulent velocity of 7.5 km/sec and an electron pressure log of -0.5. In addition, metal abundances for both variable stars are about the same, a figure similar to solar values. Finally, SU Tau is more abundant in carbon than R CrB (which exceeds solar values by a factor of 10-50).

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