Computational Seismic Holography of the Deep Interior and Far Surface of the Sun

Details Computational Seismic Holography of the Deep Interior and Far Surface of the Sun Computational Seismic Holography of the Deep Interior and Far Surface of the Sun

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.7903l&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #79.03; Bulletin of the American Astronomical Society, Vol. 34, p.780

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Computational seismic holography has given us a remarkably flexible and powerful new utility for local diagnostics of the solar interior. Major results to date include the following: - Seismic signatures surrounding sunspots up to 100 Mm in diameter, called ``acoustic moats.'' - Enhancements of locally stochastic seismic emission, called ``acoustic glories,'' surrounding complex active regions. - Chromatic siesmic emission maps of a solar flare. - Signatures suggesting compact thermal enhancements in the shallow subphotospheres of surface magnetic regions. - Synoptic phase-correlation maps of active regions on the far surface of the Sun. Prospects for deep interior diagnostics of the solar interior are highly encouraging. Seismic holography applied to the database we expect from the Solar Dynamics Observatory is nearly certain to give us a synoptic view of the local structure of flows and torsional oscillations down to the base of the convection zone. Cooperative seismic observations of both near and far surfaces of the Sun offer high quality holographic diagnostics of the solar core. Holographic diagnostics promise deep insight into the operation of the solar dynamo, and may give us indications of emerging magnetic fields significantly in advance of their appearance at the solar surface. This research has been supported by funding from the National Science Foundation and the National Aeronautics and Space Administration.

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