Centre-to-limb spectro-polarimetric diagnostics of simulated solar photospheric magnetoconvection: signatures of photospheric Alfvén waves

Shelyag, Sergiy and Przybylski, Damien 2014, Centre-to-limb spectro-polarimetric diagnostics of simulated solar photospheric magnetoconvection: signatures of photospheric Alfvén waves, Publications of the Astronomical Society of Japan, vol. 66, no. SP1, pp. S9-1-S9-6, doi: 10.1093/pasj/psu085.

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Title Centre-to-limb spectro-polarimetric diagnostics of simulated solar photospheric magnetoconvection: signatures of photospheric Alfvén waves
Author(s) Shelyag, SergiyORCID iD for Shelyag, Sergiy orcid.org/0000-0002-6436-9347
Przybylski, Damien
Journal name Publications of the Astronomical Society of Japan
Volume number 66
Issue number SP1
Start page S9-1
End page S9-6
Total pages 6
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2014-12
ISSN 0004-6264
2053-051X
Keyword(s) Sun: granulation
Sun: magnetic fields
Sun: oscillations
Sun: photosphere
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Summary Using numerical simulations of the magnetized solar photosphere carried out with the radiative magneto-hydrodynamic code, MURaM, and detailed spectro-polarimetric diagnostics of the simulated photospheric 6302Å FeI line, spectro-polarimetric signatures of Alfvén waves in magnetized intergranular lanes of the simulated solar photosphere were analysed at different positions at the solar disk. The torsional Alfvén waves in the intergranular lanes are horizontal plasma motions, which do not have a thermal perturbation counterpart. We find signatures of Alfvén waves as small-scale line profile Doppler shifts and Stokes-V area asymmetry enhancements in the simulated off-disk centre observations. These photospheric features disappear when the simulated observations are degraded with a telescope point spread function (PSF) similar to the one of Hinode. We analyse the possibilities for direct observations and confirmation of Alfvén wave presence in the solar photosphere.
Language eng
DOI 10.1093/pasj/psu085
Field of Research 0201 Astronomical and Space Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2014, The Author
Persistent URL http://hdl.handle.net/10536/DRO/DU:30114943

Document type: Journal Article
Collection: School of Information Technology
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