CAOSP abstracts, Volume: 28, No.: 2, year: 1998

Abstract: We present a study of high dispersion CCD spectra of the roAp star HD 60435 taken in the ranges 6123-6175 AA and 6675-6735 AA. Variability of both the equivalent width and radial velocity of the neutral lithium line at 6708 AA was found out. We also noticed a variability of equivalent width of stronger lines of Fe, Ca and Pr, though to a lesser extent. Effective temperature and surface gravity were derived using photometric calibrations. Abundances of identified elements were estimated. Aluminium is deficient by a factor of 20, Si and Sc are only slightly deficient. Fe and Ni are normal, Ca and Ti slightly overabundant. Cr, Mn and Co are overabundant by a factor of 15 to 25. Of rare earths, La, Ce and Gd are overabundant by a factor of 3 to 10, Sm and Nd by factors of 30 and 60 and Eu and Dy by factors of 150 and 300. Lines of Pr III were indentified but many absorptions, mostly in blends, remain unidentified.

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