Coronal X-ray structures and coronal magnetic fields
Abstract
Coronal X-ray structures are compared with corresponding current-free coronal magnetic fields, particularly with regard to compact structures where potential fields are expected to be strong enough to correspond to energy densities well above the plasma densities. The comparison is conducted using X-ray images of several active regions obtained by five different days and ground-based magnetograms for the same days. Images of the active regions are superposed on extrapolated potential field lines, and qualitative agreement is found between the two configurations. It is noted that this agreement is limited to compact structures and is especially apparent in the absence of flare activity or large structural changes. Since the extrapolated potential fields seem to represent well the general topology outlined by the X-ray structures, it is concluded that current fields make a minor contribution to the total coronal field.
- Publication:
-
Workshop on the Preliminary Results from the S-054 X-ray Telescope and the Correlated Ground-Based Observations
- Pub Date:
- 1975
- Bibcode:
- 1975xtcg.work..175P
- Keywords:
-
- Photosphere;
- Solar Activity Effects;
- Solar Corona;
- Solar Magnetic Field;
- Solar X-Rays;
- Magnetic Field Configurations;
- Skylab Program;
- Solar Flares;
- Solar Physics;
- X Ray Telescopes;
- Solar Physics