Abundance analysis of HD 22920 spectra†. Issue Volume 9:Issue S307(2014) (23rd January 2015)

• Record Type: Journal Article
• Authors: Khalack, Viktor; Poitras, Patrick
• Editors: Meynet, Georges; Georgy, Cyril; Groh, José; Stee, Philippe
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S307(2014)
• Page Start: 383
• Page End: 384
• Publication Date: 2015-01-23
• Subjects: stars: atmospheres, -- stars: chemically peculiar, -- stars: abundances, -- stars: magnetic fields; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921314007182
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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 T eff = 13640 K, log g =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.