Project VeSElkA: results of abundance analysis for HD53929 and HD63975
arXiv:1803.05023 · doi:10.1093/mnras/sty693
Abstract
Project VeSElkA (Vertical Stratification of Element Abundances) has been initiated with the aim to detect and study the vertical stratification of element abundances in the atmosphere of chemically peculiar stars. Abundance stratification occurs in hydrodynamically stable stellar atmospheres due to the migration of the elements caused by atomic diffusion. Two HgMn stars, HD53929 and HD63975 were selected from the VeSElkA sample and analysed with the aim to detect some abundance peculiarities employing the ZEEMAN2 code. We present the results of abundance analysis of HD53929 and HD63975 observed recently with the spectropolarimeter ESPaDOnS at Canada-France-Hawaii Telescope. Evidence of phosphorus vertical stratification was detected in the atmosphere of these two stars. In both cases, phosphorus abundance increases strongly towards the superficial layers. The strong overabundance of Mn found in stellar atmosphere of both stars confirms that they are HgMn type stars.
arXiv comment7 pages, 3 figures, accepted for publication in MNRAS
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Cited by in corpus (4)
- New catalogue of Chemically Peculiar stars, and Statistical Analysis
- Time-dependent atomic diffusion in the atmospheres of CP stars. A big step forward: introducing numerical models including a stellar mass loss
- Analysis of eight magnetic chemically peculiar stars with rotational modulation
- A rare phosphorus-rich star in an eclipsing binary from TESS