Excitation of Radial P-Modes in the Sun and Stars

Details Excitation of Radial P-Modes in the Sun and Stars Excitation of Radial P-Modes in the Sun and Stars

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..220..229s&link_type=abstract

Solar Physics, Volume 220, Issue 2, pp.229-242

Physics

39

Scientific paper

P-mode oscillations in the Sun and stars are excited stochastically by Reynolds stress and entropy fluctuations produced by convection in their outer envelopes. The excitation rate of radial oscillations of stars near the main sequence from K to F and a subgiant K IV star have been calculated from numerical simulations of their surface convection zones. P-mode excitation increases with increasing effective temperature (until envelope convection ceases in the F stars) and also increases with decreasing gravity. The frequency of the maximum excitation decreases with decreasing surface gravity.

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