Are chromospheric fibrils tracing the magnetic field?

Authors
Dr.
Jaime de la Cruz Rodríguez
Date and time
10 Nov 2010 - 23:00 Europe/London
Address

Aula

Talk language
English
Slides language
English
Description

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. In this work we challenge that notion for the first time by comparing their orientation to that of the magnetic field, obtained via high-resolution spectro-polarimetric observations of Ca II lines. The short answer to the question posed in the title is that mostly yes, but not always.