34th Solar Physics Division Meeting, June 2003
Session 8 Helioseismology
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[8.07] Travel-Time Sensitivities for Time-Distance Helioseismology

A. C. Birch, A. G. Kosovichev (W.W. Hansen Experimental Physics Lab, Stanford University)

Time-distance helioseismology is an important tool for studying the interior of the Sun in three dimensions. The primary data products in time-distance helioseismology are the times for wave packets (p mode or f mode) to travel between separate points on the solar surface. In order to invert travel times to obtain subsurface structure and flows it is necessary to understand the forward problem: the dependence of travel-times on small perturbations to conditions in the solar interior. We will present calculations, in the Born approximation, of the dependence of travel times on subsurface flows, perturbations to the sound speed, and spatial variations in source strength. We show that travel-time sensitivities can depend strongly on the details of the filtering that is performed during the data analysis.


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The author(s) of this abstract have provided an email address for comments about the abstract: aaronb@stanford.edu

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.