New Multiple-Ridge Ring Analysis

Details New Multiple-Ridge Ring Analysis New Multiple-Ridge Ring Analysis

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..416..111h&link_type=abstract

Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 ASP Conference Series, Vol. 416, proceedings

Astronomy and Astrophysics

Astronomy

Scientific paper

Traditional methods of ring analysis currently fit an individual peak of power with a Lorentzian or asymmetric line profile plus a background that varies with wavenumber but is constant in frequency. The new method presented here, simultaneously fits all the visible peaks at each wavenumber of interest along with a frequency varying background. This technique demonstrates that the line asymmetry found in high-degree mode ridges is largely due to the overlap of power from nearby peaks in combination with a frequency dependent background and does not represent the same type of inherent asymmetry seen in the line profiles of low-degree modes.

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