Thermodynamic history of a solar active region observed in X-rays.
Abstract
The structure and energy content of an active coronal volume during its early history are investigated using soft X-ray images secured with the glancing-incidence telescope on Skylab. During the late stages of emerging-flux-region activity, the maximum temperatures exceeded 6.5 million K. At that time, the temporal rate of change in thermal energy content was about 10 to the 25th power ergs/s and was comparable to the rate of energy loss by radiation. Fluctuations in the energy content of the X-ray source region imply that this coronal active region was probably not in energy equilibrium during the five days of observation.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1976
- DOI:
- 10.1086/182327
- Bibcode:
- 1976ApJ...210L.153T
- Keywords:
-
- Energy Budgets;
- Solar Activity;
- Solar Corona;
- Solar X-Rays;
- Thermodynamic Properties;
- X Ray Astronomy;
- Apollo Telescope Mount;
- Data Reduction;
- Energy Dissipation;
- Faculae;
- Heat Balance;
- Radiant Flux Density;
- Solar Physics;
- Solar Temperature;
- Spaceborne Astronomy;
- Solar Physics