The coronal atmosphere above solar active regions: comparison of high spatial resolution soft X-ray and centimetric observations.
Abstract
High spatial resolution observations of solar active regions in soft X-rays and centimetric wavelengths are compared using X-ray and radio data obtained during the 1973 Skylab mission. An overall correspondence in position and size between regions of enhanced X-ray emission and regions of enhanced microwave emission was noticed. However, a closer analysis of the findings suggested that substantial differences exist between the emission properties of the atmosphere over sunspots and that over plages, with the difference probably related to the average intensity of the magnetic field, which was found to be higher over sunspot umbrae than over plage areas.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1979
- DOI:
- 10.1086/156963
- Bibcode:
- 1979ApJ...229..375P
- Keywords:
-
- Radio Astronomy;
- Solar Corona;
- Solar X-Rays;
- X Ray Astronomy;
- Astronomical Catalogs;
- Brightness Temperature;
- Centimeter Waves;
- Cyclotron Radiation;
- High Resolution;
- Sunspots;
- Solar Physics;
- Radio Radiation:Solar Active Regions;
- Solar Active Regions:Solar Corona;
- Solar Active Regions:X Rays