HR: 0830h
AN: SH21B-0163    [PDF]
TI: Sensitivity of Time-Distance Measurements to Local Changes in Sound Speed and Source Properties
AU: * Birch, A
EM: aaronb@stanford.edu
AF: W.W. Hansen Experimental Physics Laboratory Stanford University, 445 Via Palou, Stanford, CA 94305
AU: Kosovichev, A
AF: W.W. Hansen Experimental Physics Laboratory Stanford University, 445 Via Palou, Stanford, CA 94305
AB: In order to interpret time-distance measurements of travel times it is important to understand the sensitivity of these measurements to different types of perturbations to a solar model. We will show example sensitivity functions for local perturbations to the sound-speed, source strength, and source correlation time. These examples show that the effect of a sound-speed perturbation on the time-distance travel-times depends on the details of the filtering. In particular, for narrow phase-speed filters, the sensitivity functions do not resemble the now traditional banana-doughnut kernels.
DE: 7260 Theory and modeling
DE: 7522 Helioseismology
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting