Spectropolarimetric inversions of the He I 10830 A multiplet in an Active Region filament

Details Spectropolarimetric inversions of the He I 10830 A multiplet in an Active Region filament Spectropolarimetric inversions of the He I 10830 A multiplet in an Active Region filament

2010-01-14

arxiv.org/abs/1001.2434v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, to appear in the proceedings of the 25th NSO Workshop on Chromospheric Structure and Dynamics

Scientific paper

Full Stokes spectropolarimetric data (in the 10830 A region) of an active region filament were obtained in July 2005 using the Tenerife Infrared Polarimeter instrument. The polarization profiles in the filament show Zeeman-like signatures. Milne-Eddington inversions were performed to infer the chromospheric magnetic field, inclination, azimuth, velocity and Doppler width from the He I 10830 A multiplet. Field strengths of the order of 600-800 G were found in the filament. Strong transverse fields at chromospheric levels were detected near the polarity inversion line. To our knowledge, these are the highest field strengths reliably measured in these structures. Our findings suggest the possible presence of a flux rope.

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