53 citations · 222 across the 8 of their papers we have counts for
6 papers · 1 filter
Numerical Models of Travel-Time Inhomogeneities in Sunspots
H. Moradi, S. M. Hanasoge, P. S. Cally
We investigate the direct contribution of strong, sunspot-like magnetic fields to helioseismic wave travel-time shifts via two numerical forward models, a 3D ideal MHD solver and M…
Scattering of acoustic waves by a magnetic cylinder
L. Gizon, L., S. M. Hanasoge +1
With the aim of studying magnetic effects in time-distance helioseismology, we use the first-order Born approximation to compute the scattering of acoustic plane waves by a magneti…
Seismic Halos Around Active Regions: An MHD Theory
Shravan M. Hanasoge
Comprehending the manner in which magnetic fields affect propagating waves is a first step toward constructing accurate helioseismic models of active region sub-surface structure a…
Global effects of local sound-speed perturbations in the Sun: A theoretical study
S. M. Hanasoge, T. P. Larson
We study the effect of localized sound-speed perturbations on global mode frequencies by applying techniques of global helioseismology on numerical simulations of the solar acousti…
{\it f}-mode interactions with thin flux tubes: the scattering matrix
S. M. Hanasoge, A. C. Birch, T. J. Bogdan +1
We calculate the scattering effects associated with the interaction of a surface gravity or {\it f} mode with a thin magnetic flux tube embedded in a realistically stratified mediu…
Impact of Locally Suppressed Wave sources on helioseismic travel times
S. M. Hanasoge, S. Couvidat, S. P. Rajaguru +1
Wave travel-time shifts in the vicinity of sunspots are typically interpreted as arising predominantly from magnetic fields, flows, and local changes in sound speed. We show here t…