CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): KUSCHNIG, R.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 418-422.
- Date: 04/1998
- Title: Doppler imaging of Ap stars
- Keyword(s): STARS: ABUNDANCES, STARS: CHEMICALLY PECULIAR, STARS:
MAGNETIC FIELDS, DOPPLER IMAGING, STARS: INDIVIDUAL: CU VIRGINIS
- Pages: 418 -- 422
Doppler imaging, a technique which inverts spectral line profile
variations of an Ap star into a two-dimensional abundance maps, provides
new observational constraints on diffusion mechanism in the presence of
a global magnetic field. A programme is presented here with the aim
to obtain abundance distributions of at least five elements on each star,
in order to study how different diffusion processes act under influence of
a stellar magnetic field. The importance of this multi-element approach is
demonstrated, by presenting the abundance maps of helium, magnesium, silicon,
chromium and iron for the magnetic B9pSi star CU Vriginis.
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