New generations of stellar model atmospheres

Details New generations of stellar model atmospheres New generations of stellar model atmospheres

2003-02-20

arxiv.org/abs/astro-ph/0302409v1

Astronomy and Astrophysics

Astrophysics

Invited review at "CNO in the Universe" conference, St Luc, Switzerland (9 pages)

Scientific paper

Stellar model atmospheres form the basis for any element abundance determination and hence are crucial ingredients for studies of stellar, galactic and cosmic evolution. With recent observational progress with the advent of 8m-class telescopes and efficient spectrographs, the dominant source of uncertainty today originates with the assumptions and approximations in the analyses, emphasizing the great need for continuing efforts in improving the realism of stellar atmosphere modelling. In the present contribution I will describe recent progress in this regard by focussing on three complementary types of model atmospheres: line-blanketed non-LTE models of hot stars, 3D hydrodynamical models of cool stars and semi-empirical models for large-scale stellar abundance analyses.

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