Viktor Khalack, Patrick Poitras
Published 2015-06-03Version 1
The new spectropolarimetric observations of HD 22920 with ESPaDOnS at CFHT reveal a strong variability of its spectral line profiles with the phase of stellar rotation. We have obtained Teff = 13640 K, logg=3.72 for this star from the best fit of its nine Balmer line profiles. The respective model of stellar atmosphere was calculated to perform abundance analysis of HD 22920 using the spectra obtained for three different phases of stellar rotation. We have found that silicon and chromium abundances appear to be vertically stratified in the atmosphere of HD 22920. Meanwhile, silicon shows hints for a possible variability of vertical abundance stratification with rotational phase.
Comments: 2 pages, 1 figure, in Proc. of IAUS 307
Journal: Proceedings of the International Astronomical Union, 2015, IAU Symposium, Volume 307, pp. 383-384
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