Physics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..311j&link_type=abstract
In: Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002,
Physics
1
Sun: Oscillations, Convection, Line Asymmetry, Acoustic Sources
Scientific paper
We model the observed velocity and intensity power spectra and the intensity-velocity cross-spectrum using an updated version of the Severino et al. (2001) model that includes the effects of the acoustic source. We find that in order to accurately describe the data it is necessary to include a correlated background component in both the V and I signals at low frequencies, and in the I signal at high frequencies. Preliminary results show that even using the new model we can not uniquely determine the phase that is related to the acoustic source depth at low frequencies, or the amplitudes and phases of the individual correlated background signals. It appears that further physical or observational constraints are needed before we can obtain this information.
Giebink Cynthia
Jefferies Stuart M.
Moretti Pier Francesco
Oliviero Maurizio
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