Spectro-polarimetric simulations of the solar limb: absorption-emission Fe I 6301.5 Å and 6302.5 Å line profiles and torsional flows in the intergranular magnetic flux concentrations

Shelyag, Sergiy 2015, Spectro-polarimetric simulations of the solar limb: absorption-emission Fe I 6301.5 Å and 6302.5 Å line profiles and torsional flows in the intergranular magnetic flux concentrations, Astrophysical journal, vol. 801, no. 1, pp. 1-8, doi: 10.1088/0004-637X/801/1/46.

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Title Spectro-polarimetric simulations of the solar limb: absorption-emission Fe I 6301.5 Å and 6302.5 Å line profiles and torsional flows in the intergranular magnetic flux concentrations
Author(s) Shelyag, SergiyORCID iD for Shelyag, Sergiy orcid.org/0000-0002-6436-9347
Journal name Astrophysical journal
Volume number 801
Issue number 1
Article ID 46
Start page 1
End page 8
Total pages 8
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2015-03-01
ISSN 0004-637X
1538-4357
Keyword(s) magnetohydrodynamics (MHD)
Sun: atmosphere
Sun: faculae, plages
Sun: magnetic fields
Sun: oscillations
Sun: photosphere
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Summary Using radiative magnetohydrodynamic simulations of the magnetized solar photosphere and detailed spectro-polarimetric diagnostics with the Fe I 6301.5 Å and 6302.5 Å photospheric lines in the local thermodynamic equilibrium approximation, we model active solar granulation as if it was observed at the solar limb. We analyze general properties of the radiation across the solar limb, such as the continuum and the line core limb darkening and the granulation contrast. We demonstrate the presence of profiles with both emission and absorption features at the simulated solar limb, and pure emission profiles above the limb. These profiles are associated with the regions of strong linear polarization of the emergent radiation, indicating the influence of the intergranular magnetic fields on the line formation. We analyze physical origins of the emission wings in the Stokes profiles at the limb, and demonstrate that these features are produced by localized heating and torsional motions in the intergranular magnetic flux concentrations.
Language eng
DOI 10.1088/0004-637X/801/1/46
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:30114949

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