Spectropolarmetrically accurate magnetohydrostatic sunspot model for forward modeling in helioseismology

Przybylski, D, Shelyag, Sergiy and Cally, PS 2015, Spectropolarmetrically accurate magnetohydrostatic sunspot model for forward modeling in helioseismology, Astrophysical journal, vol. 807, no. 1, pp. 1-11, doi: 10.1088/0004-637X/807/1/20.

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Title Spectropolarmetrically accurate magnetohydrostatic sunspot model for forward modeling in helioseismology
Author(s) Przybylski, D
Shelyag, SergiyORCID iD for Shelyag, Sergiy orcid.org/0000-0002-6436-9347
Cally, PS
Journal name Astrophysical journal
Volume number 807
Issue number 1
Article ID 20
Start page 1
End page 11
Total pages 11
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2015-07-01
ISSN 0004-637X
1538-4357
Keyword(s) Science & Technology
Physical Sciences
Astronomy & Astrophysics
Sun: helioseismology
Sun: magnetic fields
Sun: oscillations
Summary We present a technique to construct a spectropolarimetrically accurate magnetohydrostatic model of a large-scale solar magnetic field concentration, mimicking a sunspot. Using the constructed model we perform a simulation of acoustic wave propagation, conversion, and absorption in the solar interior and photosphere with the sunspot embedded into it. With the 6173 Å magnetically sensitive photospheric absorption line of neutral iron, we calculate observable quantities such as continuum intensities, Doppler velocities, as well as the full Stokes vector for the simulation at various positions at the solar disk, and analyze the influence of non-locality of radiative transport in the solar photosphere on helioseismic measurements. Bisector shapes were used to perform multi-height observations. The differences in acoustic power at different heights within the line formation region at different positions at the solar disk were simulated and characterized. An increase in acoustic power in the simulated observations of the sunspot umbra away from the solar disk center was confirmed as the slow magnetoacoustic wave.
Language eng
DOI 10.1088/0004-637X/807/1/20
Field of Research 0201 Astronomical And Space Sciences
0305 Organic Chemistry
0306 Physical Chemistry (Incl. Structural)
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2015, The American Astronomical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30114946

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