CATEGORIES
Modelling the Line-of-Sight Projection and Filtering-Induced Leakage in Time-Distance Helioseismology
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07.09.2015
Affiliation
Kiepenheuer-Institut für Sonnenphysik
Main category
Natural Sciences (Astrophysics and Astrononmy)
Alternative category
Natural Sciences (Physics)
Abstract
In current approaches to time-distance helioseismology, the line-of-sight projection effect on the traveltimes is not fully taken into account. Furthermore, filtering of full-disc data induces leakage due to the projection onto the CCD, which has so far not been accounted for. We develop a theoretical approach to consider these effects when computing sensitivity functions. As the formulas obtained do not seem to give results for spherical Born approximation sensitivity functions in a reasonable computation time, we develop tests to estimate the strength of the effects.
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