FUNDAMENTAL PARAMETERS OF SUPERGIANT STAR HD 40589 (A0Iab)

Abstract

The atmosphere of HD 40589 (A0Iab) supergiant star of A spectral class was studied using the model atmosphere and parallax methods. The effective temperatures (Teff) and surface of gravity (log g) were determined using a comparison of the observed and  calculated values of the photometric quantities [c1], Q and the equivalent widths of the hydrogen Balmer lines and parallax. Based on the Fe II lines the microturbulent velocity and metallicity [Fe/H] were determined. Metallicity of the program star is close to the metallicity of the Sun. This shows that our program star and the Sun are formed from the interstellar medium of a similar metallicity.