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Time-distance helioseismology in the vicinity of sunspots (1995)

D'Silva, Sydney ; Duvall, Thomas L., Jr.

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Publication Date: 2011-08-24

Description: We use the ray description of acoustic-gravity modes to calculate time-distance diagrams for the quiet Sun and for regions in the vicinity of a sunspot with a monolithic flux-tube structure. Time-distance curves for the quiet Sun match the observations of Duvall et al. In the vicinity of a sunspot these quiet Sun curves split into a family of closely spaced curves. The structure of this bandlike feature is found to be sensitive to the sunspot model and can be a diagnostic of the subsurface geometry of the sunspot flux tube.

Keywords: SOLAR PHYSICS

Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 438; 1; p. 454-462

Format: text

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