Helioseismic modeling of background flows
Document Type
Article
Publication Date
3-1-2021
Abstract
We present a three-dimensional (3D) numerical solver of the linearized compressible Euler equations (Global Acoustic Linearized Euler), used to model acoustic oscillations throughout the solar interior. The governing equations are solved in conservation form on a fully global spherical mesh (0 f 2π, 0 θ π, 0 r Re) over a background state generated by the standard solar model S. We implement an efficient pseudospectral computational method to calculate the contribution of the compressible material derivative dyad to internal velocity perturbations, computing oscillations over arbitrary 3D background velocity fields. This model offers a foundation for a “forward-modeling” approach, using helioseismology techniques to explore various regimes of internal mass flows. We demonstrate the efficacy of the numerical method presented in this paper by reproducing observed solar power spectra, showing rotational splitting due to differential rotation, and applying local helioseismology techniques to measure travel times created by a simple model of single-cell meridional circulation.
Identifier
85102489794 (Scopus)
Publication Title
Astrophysical Journal Supplement Series
External Full Text Location
https://doi.org/10.3847/1538-4365/abd3fe
ISSN
00670049
Issue
1
Volume
253
Recommended Citation
Stejko, Andrey M.; Kosovichev, Alexander G.; and Mansour, Nagi N., "Helioseismic modeling of background flows" (2021). Faculty Publications. 4273.
https://digitalcommons.njit.edu/fac_pubs/4273