The Local Inhomogeneities of the Chemical Composition on the Surface of the Strontium Ap-Star HD 140160
The surface inhomogeneities of the chemical composition of HD 140160 (χ Ser) were studied from the spectral line profiles. The method of quantitative analysis of local abundance proposed by Khokhlova (1974) was used. The overabundance of Sr up to 103 was found in three ‘spots’ on the surface of the star and normal abundance outside the spots. Iron was found to be overabundant up to 10 times in four spots and deficient by 10 times outside the spots. Some arguments in favour of a supernova hypothesis are mentioned to explain the deficiency of iron.