The life of coronal bright points
Abstract
Coronal bright points are small-scale magnetic regions found all over the solar disk. They are visible in coronal emission lines which sample plasma at around 1-2 MK. In this study we follow the complete lifetime of several coronal bright points, from the time they appear in the SDO/AIA coronal filtergrams to the time they fade again into the quiet solar background emission. In addition to the hot coronal emission, lower temperature chromospheric filtergrams (e.g. AIA 304 Å) sometimes show the formation of dark absorption structures similar to filaments. From SDO/HMI we can get the accompanying evolution of the photospheric magnetic flux density and also calculate the plane-of-sky plasma flow field using local correlation tracking. Most of the coronal bright points show some jet activity during their lifetime and these data allow to us to study both the energy buildup of the coronal bright point and the initiation of the jets.
- Publication:
-
American Astronomical Society Meeting Abstracts #234
- Pub Date:
- June 2019
- Bibcode:
- 2019AAS...23411703M