Spectropolarimetric Diagnostics at the Solar Photosphere near the Limb

Details Spectropolarimetric Diagnostics at the Solar Photosphere near the Limb Spectropolarimetric Diagnostics at the Solar Photosphere near the Limb

2009-10-15

arxiv.org/abs/0910.2885v1

2009ASPC..405..189Y

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Scientific paper

In the present work, we investigate the formation of Stokes profiles and spectro-polarimetric diagnostics in an active region plage near the limb. We use 3-D radiation-MHD simulations with unipolar fields of an average strength of 400 G, which is largely concentrated in flux tubes in which the field reaches typical kilo-Gauss values. We generate synthetic Stokes spectra by radiative transfer calculations, then we degrade the simulated Stokes signal to account for observational conditions. The synthetic data treated in this manner are compared with and found to roughly reproduce spectro-polarimetric high-resolution observations at Mu=0.39 obtained by the SOUP instrument with the Swedish 1-m Solar Telescope at the beginning of 2006.

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