Reflection and trapping of Alfven waves in a spherically symmetric stellar atmosphere

Details Reflection and trapping of Alfven waves in a spherically symmetric stellar atmosphere Reflection and trapping of Alfven waves in a spherically symmetric stellar atmosphere

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..309a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 10, 1990, p. 309-323.

Other

57

Cool Stars, Magnetohydrodynamic Waves, Stellar Atmospheres, Wave Reflection, Boundary Value Problems, Resonant Frequencies, Stellar Coronas, Stellar Winds, Trapping, Wave Propagation

Scientific paper

Alfven wave propagation in a spherically symmetric isothermal and stratified stellar atmosphere are analzyed using a time-dependent MHD numerical model. Particular consideration is given to wave reflection and the resultant trapping of the wave due to a peak in the Alfven speed in the atmosphere. Resonance frequencies in the trapping region and the effect of trapping on Alfven wave pressure force and propagation are examined. The data reveal that Alfven wave trapping has a potentially important role in accelerating winds from cool stars.

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