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New Time-distance helioseismology results from the SOI/MDI experiment

Published online by Cambridge University Press:  25 May 2016

T.L. Duvall Jr. ,
A.G. Kosovichev  and
P.H. Scherrer
T.L. Duvall Jr.
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
A.G. Kosovichev
Affiliation:
W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA
P.H. Scherrer
Affiliation:
W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA

Abstract

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The SOI/MDI experiment on SOHO has some unique capabilities for time-distance helioseismology. The great stability of the images observed without benefit of an intervening atmosphere is quite striking. It has made it possible for us to detect the time of flight for separations of points as small as 2.4 Mm in the high-resolution mode of MDI (0.6 arcsec/pixel). This has enabled us to detect the supergranulation flow beneath the surface. Using a tomographic inversion technique, we can now study the 3-dimensional evolution of the flows near the solar surface.

Type
Part I: Helioseismology: From ground or space, a worldwide cooperation
Information
Symposium - International Astronomical Union , Volume 181: Sounding Solar and Stellar Interiors , 1997 , pp. 83 - 89
Copyright
Copyright © Kluwer 1997 

References

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