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Spectropolarmetrically accurate magnetohydrostatic sunspot model for forward modeling in helioseismology
journal contribution
posted on 2015-07-01, 00:00 authored by D Przybylski, Sergiy ShelyagSergiy Shelyag, P S CallyWe 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.
History
Journal
Astrophysical journalVolume
807Issue
1Article number
20Pagination
1 - 11Publisher
IOP PublishingLocation
Bristol, Eng.Publisher DOI
ISSN
0004-637XeISSN
1538-4357Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2015, The American Astronomical SocietyUsage metrics
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