Characteristics of the response of isothermal atmospheres with nonlinear waves
作者:
Yasuo Tanaka,
Michinori Nakata,
Mine Takeuti,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1986)
卷期:
Volume 36,
issue 2
页码: 145-159
ISSN:0309-1929
年代: 1986
DOI:10.1080/03091928608208800
出版商: Taylor & Francis Group
关键词: Isothermal atmosphere;nonlinear waves;stellar pulsations
数据来源: Taylor
摘要:
We have studied the behavior of nonlinear waves in isothermal atmospheres using an improved beam scheme method. It is shown that although the magnitude of the mass leakage due to side beams is significant, nevertheless in a motion close to hydrostatic equilibrium it can be suppressed, if special density distributions and/or suitable mesh intervals are selected. We adopt as the parameters for our model of the atmospheresM=1 M⊙,R=50 R⊙ andT=4864 K. The time variation of the physical quantities in each cell is found for several oscillation periods. The critical frequency for the model atmosphere in the case of waves with a weak nonlinearity seems to be consistent with that in the linear theory.
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