Modeling the Solar Oscillation l-v Power Spectrum
Abstract
We have developed a ``two-dimensional'' algorithm which simultaneously models the ell- ν spectrum over several n-values and a wide range of ell-values. In addition to the estimation of the line profile parameters, the algorithm also allows a determination of the spatial response function for the observations. This is an important improvement over algorithms which either rely on theoretical leakage matrix calculations, or use many extra free parameters to model the features due to spatial leakage. Using intensity data obtained at the South Pole, and velocity data from GONG and MDI, we show that 2-D modeling allows significant increases in the precision of the measured line profile parameters for peaks with low peak-to-background ratios.
- Publication:
-
Structure and Dynamics of the Interior of the Sun and Sun-like Stars
- Pub Date:
- 1998
- Bibcode:
- 1998ESASP.418..267M