Fundamental parameters of Ap-star HD 108662

Abstract

We present the results of self-consistent spectroscopic analysis of the atmosphere of Ap-star HD 108662 based on high resolution spectrum and spectrophotometric observations in a wide wavelength range. Magnetic field effects were taking into account. Abundances of 24 chemical elements were derived, and stratification of Fe which lines make the main contribution to the line absorption, was obtained. Another iron group element, Cr, does not show significant deviations from homogeneous distribution in the star atmosphere. As a result, we determined the following fundamental parameters of HD 108662: T eff = 10200 K, lg g = 4.0, R/R ⊙ =2.09 and log(L/L ⊙ ) = 1.63. The rotational velocity v sin i = 20.4 km/c and magnetic field modulus B s = 3300 Gauss were estimated as well.