Tomographic Imaging of the Suns Interior
- Kosovichev, A. G.
- Apr. 10, 1996.
- Physical Description:
- 1 electronic document
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- A new method is presented of determining the three-dimensional sound-speed structure and flow velocities in the solar convection zone by inversion of the acoustic travel-time data recently obtained by Duvall and coworkers. The initial inversion results reveal large-scale subsurface structures and flows related to the active regions, and are important for understanding the physics of solar activity and large-scale convection. The results provide evidence of a zonal structure below the surface in the low-latitude area of the magnetic activity. Strong converging downflows, up to 1.2 km/s, and a substantial excess of the sound speed are found beneath growing active regions. In a decaying active region, there is evidence for the lower than average sound speed and for upwelling of plasma.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19970020742.
Accession ID: 97N21984.
The Astrophysical Journal; Volume 461; L55-L57.
- Copyright, Distribution as joint owner in the copyright.
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