Deep-Focus Diagnostics of Sunspot Structure

Details Deep-Focus Diagnostics of Sunspot Structure Deep-Focus Diagnostics of Sunspot Structure

2010-12-30

arxiv.org/abs/1101.0125v1

Magnetic Coupling between the Interior and Atmosphere of the Sun, edited by S.S. Hasan and R.J. Rutten; Astrophysics and Space

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, 4 figures, published in the conference proceedings "Magnetic Coupling between the Interior and Atmosphere of the Sun"

Scientific paper

10.1007/978-3-642-02859-5_35

In sequel to Moradi et al. [2009, ApJ, 690, L72], we employ two established numerical forward models (a 3D ideal MHD solver and MHD ray theory) in conjunction with time-distance helioseismology to probe the lateral extent of wave-speed perturbations produced in regions of strong, near-surface magnetic fields. We continue our comparisons of forward modeling approaches by extending our previous surface-focused travel-time measurements with a common midpoint deep-focusing scheme that avoids the use of oscillation signals within the sunspot region. The idea is to also test MHD ray theory for possible application in future inverse methods.

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