High Temperatures in Active Regions
Jump to navigation
Jump to search
| Nugget | |
|---|---|
| Number: | 97 |
| 1st Author: | Jim McTiernan |
| 2nd Author: | |
| Published: | 16 March 2009 |
| Next Nugget: | TBD |
| Previous Nugget: | The Jakimiec Track |
Introduction
Since RHESSI was launched in February 2002, it has observed thousands of solar flares (more than 46,000 in the latest reprocessing of the RHESSI flare list). It was noticed in 2002 that RHESSI was observing solar emission even when there are no flares present (Ref. 1). The temperature required for this high energy emission is greater than 5 MK, a temperature range that is not often considered for solar active regions, mostly because the instruments used for T measurement of active regions, such as Yohkoh SXT, SOHO EIT or CDS, or didn't have much response to high T.