Characteristics of the response of isothermal atmospheres with nonlinear waves

Details Characteristics of the response of isothermal atmospheres with nonlinear waves Characteristics of the response of isothermal atmospheres with nonlinear waves

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gapfd..36..145t&link_type=abstract

Geophysical and Astrophysical Fluid Dynamics (ISSN 0309-1929), vol. 36, no. 2, 1986, p. 145-159.

Statistics

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1

Dynamic Response, Isothermal Flow, Stellar Atmospheres, Stellar Oscillations, Wave Propagation, Atmospheric Models, Computational Grids, Density Distribution, Hydrostatic Pressure, Nonlinearity

Scientific paper

An improved beam scheme method is used to investigate the behavior of nonlinear waves in isothermal atmospheres, and it is demonstrated that the mass leakage can be reduced in the beam scheme if special density distributions and/or suitable mesh intervals are adopted. The response of a simple 4864 K isothermal atmosphere is simulated for stars of one solar mass and 50 solar radii, and the time variation of the physical quantities in each cell is determined for several oscillation periods. The occurrence of critical periods in nonlinear waves with small amplitudes is noted, and the critical period derived seems to be consistent with that of the linear theory.

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