Computer Science – Sound
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0703k&link_type=abstract
American Astronomical Society, SPD meeting #40, #7.03; Bulletin of the American Astronomical Society, Vol. 41, p.813
Computer Science
Sound
Scientific paper
Helioseismic inferences of the subsurface structure of sunspots have been in the focus of local helioseismology investigations and discussions during the past decade. Initially obtained from the SOHO/MDI high-resolution data using a simple ray-path perturbation theory for inversions of acoustic travel times the results draw significant criticism and concerns, but, in general, have been confirmed by subsequent measurements and inversions. Nevertheless, because of the complexity of the wave excitation and propagation in the subsurface layers there are still potential systematic uncertainties that must be resolved. Recently developed 3D simulations of MHD waves provide an important tool for the verification and testing of local helioseismology results. However, the use of the simulations is not as straightforward as originally thought. In particular, we present results of testing of the time-distance helioseismology measurement and inversion procedures for sound-speed perturbations modeling the sunspot subsurface structure, and discuss the limitations and uncertainties of the simulations and helioseismic inferences.
Hartlep Thomas
Kosovichev Alexander G.
Parchevsky Konstantin V.
Zhao Jun
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