Heioseismic Analysis of the Solar Activity Cycle

Details Heioseismic Analysis of the Solar Activity Cycle Heioseismic Analysis of the Solar Activity Cycle

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001stin...0231979j&link_type=abstract

Thesis, PB2002-102514; NCAR/CR-173

Physics

Optics

Activity Cycles (Biology), Solar Oscillations, Solar Activity, Sun, Magnetic Properties, Magneto-Optics, Data Acquisition

Scientific paper

Solar oscillations, in particular their characteristic frequencies, provide a unique diagnostic tool to investigate and understand the structure and dynamics of the Sun. These frequencies are modified in well known manners by different internal dynamical effects, like rotation or magnetism, allowing the study of the underlying physical processes. Improved data from different operational projects such as BiSON, IRIS, GONG, LOWL, etc has enhanced in the last few years our ability to study the solar interior. The LOWL experiment has been collecting solar observation data since February 1994 and represents one of the best Doppler analyzers for the observation of the solar oscillations. It is based on a Magneto-Optical Filter with no moving parts, which employs a two-beam technique to make simultaneous observations of the solar disk in opposite wings of the absorption line of Potassium at 769.9 nm.

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