Travel-Time Sensitivities for Time-Distance Helioseismology

Details Travel-Time Sensitivities for Time-Distance Helioseismology Travel-Time Sensitivities for Time-Distance Helioseismology

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spd....34.0807b&link_type=abstract

American Astronomical Society, SPD meeting #34, #08.07; Bulletin of the American Astronomical Society, Vol. 35, p.823

Computer Science

Sound

Scientific paper

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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