Theoretical amplitudes of solar gmodes.
Abstract
This work presents predictions on the amplitudes of solar gmodes. It is based on the assumption that convective overshoot into the convectively stable interior generates gravity waves. Based on this assumption it is possible to estimate values for the amplitude of the gmodes below the solar convection zone. Numerical simulations, giving the transmission of gravity waves through the convection zone have been carried out for 5 different frequencies and horizontal extents equivalent to lvalues approximately in the range 618. The horizontal velocity amplitude of solar gmodes near the solar surface is estimated to be in the range 0.015mm/s. The largest value assumes that all the available energy from the excitation goes into a single mode. Using assumptions on the ratio between intensity and velocity oscillations the amplitude in intensity of a l=6 mode is estimated to be <=5x10^7^.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 August 1996
 Bibcode:
 1996A&A...312..610A
 Keywords:

 HELIOSEISMOLOGY;
 GRAVITY WAVES;
 CONVECTION;
 GMODES