Are solar chromospheric fibrils tracing the magnetic field?

Details Are solar chromospheric fibrils tracing the magnetic field? Are solar chromospheric fibrils tracing the magnetic field?

2011-01-18

arxiv.org/abs/1101.3551v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 3 figures. Accepted for publication in Astronomy & Astrophysics

Scientific paper

Fibrils are thin elongated features visible in the solar chromosphere in and around magnetized regions. Because of their visual appearance, they have been traditionally considered a tracer of the magnetic field lines. For the first time, we challenge that notion, by comparing their orientation to that of the magnetic field, obtained via high-resolution spectropolarimetric observations of Ca ii lines. The short answer to the question posed in the title is that mostly yes, but not always.

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