Acoustic Oscillations During the Extended Solar Minimum

Details Acoustic Oscillations During the Extended Solar Minimum Acoustic Oscillations During the Extended Solar Minimum

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21631901t&link_type=abstract

American Astronomical Society, AAS Meeting #216, #319.01; Bulletin of the American Astronomical Society, Vol. 41, p.909

Astronomy and Astrophysics

Astronomy

Scientific paper

The acoustic oscillation frequencies of the Sun vary with the progress of the solar cycle and in general, the frequencies increase as solar magnetic activity increases. Our recent study on frequencies of intermediate degree modes of the Sun during the extended minimum phase between cycles 23 and 24 shows a surprising anti-correlation between the frequencies and the measures of solar activity. In this paper, we present results of our analysis on the temporal evolution of frequency shifts measured locally over the solar disk during the period of 2007-2009 and show that the extended minimum period between cycles 23 and 24 is rather unusual.

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