The electron-impact broadening effect in hot star atmospheres: The case ofsingly- and doubly-ionized zirconium

The electron-impact widths for 30 Zr III lines were calculated using the mo dified semi-empirical (MSE) method. For two Zr IE and four Zr III astrophys ically important UV lines, only electron-impact widths are given, since for their calculation the experimental oscillator strengths were used and cons equently the accuracy of the parameters is lower than in the case of other lines. The influence of the electron-impact mechanism on line shapes and eq uivalent widths in hot star atmospheres was also considered. The impact of the electron-impact broadening effect on abundance determination, particula rly its effect on "zirconium conflict" is discussed as well.