HR: 0830h
AN: SP11B-11    [Abstracts]
TI: Simulations Of Acoustic-Flow Interaction In Spherical Geometry: Steps Toward Validating Helioseismology
AU: * Hanasoge, S M
EM: shravan@stanford.edu
AF: W. W. Hansen Experimental Physics Laboratory, 455 Via Palou, Stanford, CA 94305-4085
AU: Duvall, T L
EM: duvall@shock.stanford.edu
AF: Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771
AU: DeRosa, M L
EM: derosa@lmsal.com
AF: Lockheed Martin Solar and Astrophysics Laboratory, Lockheed Martin ATC O/L9-41 B/252 3251 Hanover St., Palo Alto, CA 94303
AU: Hurlburt, N E
EM: hurlbut@lmsal.com
AF: Lockheed Martin Solar and Astrophysics Laboratory, Lockheed Martin ATC O/L9-41 B/252 3251 Hanover St., Palo Alto, CA 94303
AB: We simulate acoustic wave interaction with flows in spherical geometry with the specific intent of using them as artificial data for validation of helioseismology. The numerical procedure is pseudo-spectral; we employ a spherical harmonic representation of the spherical surface, compact finite differences in the radial direction and a fourth order Runge-Kutta time stepping scheme. We also excite surface gravity modes, modeling all waves as linear perturbations to the background state so as to gain further insight into wave-flow interaction. Towards validation, we apply techniques of helioseismology to the artificial data to determine the efficacy of the helioseismic inversion procedure. In other words, we are attempting the forward problem.
DE: 7522 Helioseismology
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly