Acoustic waves in early-type stars. I - an efficient method for the computation of thermodynamic quantities in time-dependent stellar atmosphere calculations

Details Acoustic waves in early-type stars. I - an efficient method for the computation of thermodynamic quantities in time-dependent stellar atmosphere calculations Acoustic waves in early-type stars. I - an efficient method for the computation of thermodynamic quantities in time-dependent stellar atmosphere calculations

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127...93w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 1, Oct. 1983, p. 93-96. Sponsorship: Deutsche Forschungsgemeinschaft.

Computer Science

Sound

10

Early Stars, Sound Waves, Stellar Atmospheres, Thermodynamic Equilibrium, Atmospheric Composition, Chromosphere, Hydrodynamic Equations, Time Dependence

Scientific paper

The author presents a numerical scheme, which analytically calculates both the LTE equation of state for a gas with stellar composition (including the H2-molecule) and important thermodynamic derivatives necessary for an implementation of that routine into a hydrodynamic code based on the theory of characteristics. Although a wide variety of methods exists to solve that problem in the case of time-independent stellar atmosphere calculations, this scheme is new in that it does not need time-consuming and tedious procedures such as numerical differentiation, iteration or matrix operations to yield both accurate and fast results required for time-dependent codes.

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