Episodic mass loss in late-type stars due to acoustic wave packets

Details Episodic mass loss in late-type stars due to acoustic wave packets Episodic mass loss in late-type stars due to acoustic wave packets

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188l...5c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. L5-L8.

Computer Science

Sound

39

Late Stars, Red Giant Stars, Sound Waves, Stellar Mass Ejection, Stellar Models, Wave Packets, Magnetohydrodynamic Waves, Normal Density Functions, Stellar Atmospheres, Stochastic Processes, Time Dependence

Scientific paper

Non-linear time-dependent acoustic wave calculations have been undertaken in an atmosphere model similar to α Boo. The model was chosen to represent conditions in a red giant beyond the Linsky-Haisch division line. It is considered that the wave period changes stochastically in the short period range. The distribution of the periods is assumed as Gaussian around 1.4×104s. The calculations predict a time-averaged period of 1.27×105s which is in excellent agreement with observations. It is found that stochastically recurring supersonic flows are generated which lead to episodic mass loss.

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