Temporal Variations in Fibril Orientation
Astrophysics
2017-12-27 v1
Abstract
We measure variations in orientation of fourteen dynamic fibrils as a function of time in a small isolated plage and nearby network using a 10-min time sequence of H-alpha filtergrams obtained by the Dutch Open Telescope. We found motions with average angular velocities of the order of 1 deg/min suggesting systematic turning from one limit position to another, particularly apparent in the case of fibrils with lifetimes of a few minutes. Shorter fibrils tend to turn faster than longer ones, which we interpret as due to vortex flows in the underlying granulation that twist magnetic fields.
Cite
@article{arxiv.astro-ph/0703733,
title = {Temporal Variations in Fibril Orientation},
author = {J. Koza and P. Sütterlin and A. Kucera and J. Rybák},
journal= {arXiv preprint arXiv:astro-ph/0703733},
year = {2017}
}
Comments
In press,"Physics of Chromospheric Plasmas" (Coimbra), ASP 368, 115 (2007)