The electron - impact broadening effect in CP stars : the case of La ii , La iii , Eu ii , and Eu iii lines
نویسنده
چکیده
The electron-impact widths and shifts for six Eu ii lines and widths for three La ii, and six La iii multiplets have been calculated by using the modified semiempirical method. Estimation for Stark widths of 664.506 nm (Eu ii) and 666.634 nm (Eu iii) lines are given as well. The influence of the electron-impact mechanism on line shapes and equivalent widths in hot star atmospheres has been considered.
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