Stellar models and opacity.. The LL MODELS approach

Autor(en)

Christian Stütz

Abstrakt

Computation of the opacities of the millions of spectral lines contributing to the absorbtion is one of the main tasks in modelling stellar atmospheres. Several statistical techniques have been developed in the past to represent line absorbtion. They do well for stars meeting the method's assumptions close enough. We implemented a general method, the line by line (LL) method, in the widely used ATLAS9. It avoids problems resulting from statistical techniques and allows us to calculate complex models resembling individual abundance patterns and stratification of element abundances and turbulent velocity. Still the implemented numerical routines make it feasible to calculate models on modern PC's in a time comparable to the time required by classical routines.

Organisation(en)

Institut für Astrophysik

Journal

Memorie Societa Astronomica Italiana

Band

8, Suppl

ISSN

0037-8720

Publikationsdatum

2005

Peer-reviewed

Ja

ÖFOS 2012

1010 Mathematik, 1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3cb6a23b-a98f-4c7a-9f1e-0435f246c69a