Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2218h&link_type=abstract
American Astronomical Society Meeting 210, #22.18; Bulletin of the American Astronomical Society, Vol. 39, p.127
Astronomy and Astrophysics
Astronomy
Scientific paper
The Global Oscillations Network Group (GONG) has now completed, and the Michelson Doppler Imager (MDI) aboard SOHO will soon complete, a full eleven years of continuous observations of the medium-degree solar oscillations. This enables us to follow changes in the acoustic mode parameters and interior dynamics over a full solar cycle. We present results from observations of convection-zone dynamics, in which the torsional oscillation pattern seen at the surface can be followed throughout most of the bulk of the convection zone, and also changes in the frequency, lifetime and amplitude of the modes which can be shown to be closely related in space and time to the migrating pattern of surface activity.
This work utilizes data obtained by the Global Oscillation Network Group (GONG) program, managed by the National Solar Observatory, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation. SOHO is a mission of international cooperation between ESA and NASA.
Christensen-Dalsgaard Joergen
Hill F. F.
Howe Rachel
Komm Rudolf W.
Schou Jepser
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