2018/01/05 by Dan Yang
Energy · Engineering · Physics and Astronomy · #Acoustic holography #Helioseismology #Holography #Homogeneous #Point (geometry) #Point source #Solar Energy Systems and Technologies #Solar Thermal and Photovoltaic Systems #Solar and Space Plasma Dynamics #astro-ph.SR
paper · pdf · doi:10.1007/s11207-018-1246-0
17 pages, 8 figures
arxiv created 2018/01/05 · openalex created_date 2018/01/12 · openalex publication_date 2018/01/17 · arxiv updated 2018/02/14 · openalex updated_date 2026/08/08
Helioseismic holography is a powerful technique used to probe the solar interior based on estimations of the 3D wavefield. The Porter–Bojarski holography, which is a well-established method used in acoustics to recover sources and scatterers in 3D, is also an estimation of the wavefield, and hence it has the potential of being applied to helioseismology. Here we present a proof-of-concept study, where we compare helioseismic holography and Porter–Bojarski holography under the assumption that the waves propagate in a homogeneous medium. We consider the problem of locating a point source of wave excitation inside a sphere. Under these assumptions, we find that the two imaging methods have the same capability of locating the source, with the exception that helioseismic holography suffers from “ghost images” ( i.e. artificial peaks away from the source location). We conclude that Porter–Bojarski holography may improve the method currently used in helioseismology.