Kink Waves in an Active Region Dynamic Fibril
Abstract
We present high spatial and temporal resolution Ca II 8542 Å observations of a kink wave in an on-disk chromospheric active region fibril. The properties of the wave are similar to those observed in off-limb spicules. From the observed phase and period of the wave we determine a lower limit for the field strength in the chromospheric active region fibril located at the edge of a sunspot to be a few hundred gauss. We find indications that the event was triggered by a small-scale reconnection event higher up in the atmosphere.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 2011
- DOI:
- 10.1088/0004-637X/739/2/92
- arXiv:
- arXiv:1107.3113
- Bibcode:
- 2011ApJ...739...92P
- Keywords:
-
- Sun: chromosphere;
- Sun: oscillations;
- sunspots;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 16 pages, 6 figures. Accepted for publication in ApJ