CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): KUPKA, F.; PISKUNOV, N.E.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 228-232.
- Date: 04/1998
- Title: CP star atmospheres based on individual ODFs
- Keyword(s): STARS: ATMOSPHERES, STARS: ATMOSPHERE MODEL, LINE BLANKETING,
OPACITY DISTRIBUTION FUNCTIONS
- Pages: 228 -- 232
Abstract:
We describe a new method for the computation of opacity distribution
functions (ODFs) useful to calculate one-dimensional model atmospheres in
local thermal equilibrium (LTE). The new method is fast enough to be
applied on current workstations and allows the computation of model
atmospheres which deviate significantly from (scaled) solar chemical
composition. It has reproduced existing ODFs and model atmospheres for
solar abundances. Depending on the type of chemical peculiarity the
"individual" model atmosphere may have a structure and surface fluxes
similar to atmospheres based on (scaled) solar abundances or
deviate in a way that cannot be reproduced by any of the conventional
models. Examples are given to illustrate this behavior. The availability
of models with "individualized" abundances is crucial for abundance
analyses and Doppler imaging of extreme CP stars.
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