Nonlinear stellar pulsations. I - Numerical methods, basic physics, initial models and first results

Details Nonlinear stellar pulsations. I - Numerical methods, basic physics, initial models and first results Nonlinear stellar pulsations. I - Numerical methods, basic physics, initial models and first results

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..417d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 417-427.

Statistics

Computation

27

Hertzsprung-Russell Diagram, Hydrodynamic Equations, Radiative Transfer, Stellar Oscillations, Cepheus Constellation, Computational Astrophysics, Stellar Models

Scientific paper

An adaptive grid numerical method for computing nonlinear stellar pulsations is presented, and its advantages and improvements over the usual Langrangian approach are discussed. Periodic solutions in the case of Cepheids and an irregular behavior in the case of extended cool objects are obtained. To provide a sufficient spatial resolution in regions of steep gradients the nonlinear system of radiation hydrodynamics is solved implicitly in conservative form on a fully adaptive grid.

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