Solar Cycle Changes in p-Mode Frequencies and Asphericity 1995-2000

Details Solar Cycle Changes in p-Mode Frequencies and Asphericity 1995-2000 Solar Cycle Changes in p-Mode Frequencies and Asphericity 1995-2000

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sp21c03h&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SP21C-03 INVITED

Physics

7522 Helioseismology

Scientific paper

With 5 years of analysed data from the GONG (Global Oscillation Network Group) project and the Solar Oscillations Investigation (SOI) using the Michelson Doppler Imager (MDI) aboard the SOHO spacecraft, we can investigate the solar-cycle changes in the medium-degree solar p-mode frequencies in much more detail than has previously been possible. The quality of the data allows us to study the variations in the central frequencies of individual (l,n) multiplets, and also to demonstrate that the latitudinal variation of the frequency changes within a multiplet correlates closely with the latitudinal distribution of surface magnetic activity. We report here on the latest results of such an investigation, and the implications for our understanding of the relationship between p-mode frequencies and solar activity.

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