Nonaxisymmetric variations deep in the convection zone

Details Nonaxisymmetric variations deep in the convection zone Nonaxisymmetric variations deep in the convection zone

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..259d&link_type=abstract

In: Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002,

Physics

10

Helioseismology

Scientific paper

Using a deep-focusing time-distance technique and the MDI medium-1 data, a preliminary study on nonaxisymmetric variability deep in the convection zone has been performed. The purpose of the present study is to see what signals might be present in raw travel times indicating variation, and what are the noise levels. Correlations with point separations in the range 40-50 deg have been measured for the entire 6+ year dataset over a significant fraction of the solar disk. Both flows and mean-time variations have been examined. Travel time maps are correlated from one day to the next, indicating real solar signals.

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