Local acoustic diagnostics of the solar interior

Details Local acoustic diagnostics of the solar interior Local acoustic diagnostics of the solar interior

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...392..739b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 392, no. 2, June 20, 1992, p. 739-745.

Astronomy and Astrophysics

Astrophysics

68

Solar Interior, Solar Magnetic Field, Solar Oscillations, Sunspots, Doppler Effect, Holography, Solar Activity

Scientific paper

Two diagnostic utilities, acoustic power maps, and surface acoustic flux maps are used to explore the local diagnostics of magnetic field structure in the solar interior. The acoustic power maps, constructed from 50 hr of continuous K-line intensity images, show three general features: acoustic power deficits at 3 mHz corresponding to surface magnetic flux, acoustic power enhancements at 6 mHz surrounding the exterior of magnetic regions, and occasional power deficits at 3 mHz which extend beyond magnetic regions visible on the surface to regions of quiet-sun. Surface acoustic flux vector maps of two active regions were constructed for two 6-hr time-series of Dopplergrams. Both maps show the divergence of 3-mHz acoustic flux into surface magnetic structures and also sources and sinks of wave energy which are not associated with surface features.

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