Effect of time-dependent velocity fields on solar oscillations

Details Effect of time-dependent velocity fields on solar oscillations Effect of time-dependent velocity fields on solar oscillations

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.464..243r&link_type=abstract

In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000,

Computer Science

2

Solar Oscillations, Perturbation Theory

Scientific paper

Velocity fields in the solar convection zone have various influences on the solar oscillations. Besides the excitation they lead to splittings into multiplets in the case of differential rotation and to frequency shifts of the multiplets components in the case of convection cells. As the velocity fields are time-dependent, these frequency shifts must be time-dependent as well. Moreover, the amplitudes and therefore the mode energies of the solar oscillations are affected. We use time-dependent perturbation theory to show how the p-mode frequencies and energies are influenced by non-stationary velocity fields and present possible effects on the line profiles in the power spectra.

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