Project VeSElkA: Vertical Stratification of Element Abundances
Viktor Khalack (1), Francis LeBlanc (1) ((1) D\'epartement de, Physique et d'Astronomie, Universit\'e de Moncton, Moncton, N.-B., Canada E1A, 3E9)
TL;DR
This paper introduces Project VeSElkA, a spectral analysis study of chemically peculiar stars, focusing on vertical element stratification in stellar atmospheres to understand atomic diffusion effects.
Contribution
It presents new observational evidence of vertical element stratification in CP stars, supporting atomic diffusion as a key mechanism behind chemical peculiarities.
Findings
Detection of vertical abundance stratification in several CP stars
Evidence supporting atomic diffusion as a cause of chemical peculiarities
Observation of 34 CP stars with ESPaDOnS at CFHT
Abstract
A new research project on spectral analysis that aims to characterize the vertical stratification of element abundances in stellar atmospheres of chemically peculiar (CP) stars is discussed in detail. Some results on detection of vertical abundance stratification in several slowly rotating main sequence CP stars are presented and considered as an indicator of the effectiveness of the atomic diffusion mechanism responsible for the observed peculiarities of chemical abundances. This study is carried out in the frame of Project VeSElkA (Vertical Stratification of Elements Abundance) for which 34 slowly rotating CP stars have been observed with the ESPaDOnS spectropolarimeter at CFHT.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science