Disappearance of a sunspot accompanying an M-Class flare
Abstract
A white-light flare on 2001 March 10 was well observed in the Halpha line and Ca II λ8542 line using the imaging spectrograph installed in the Solar Tower Telescope of Nanjing University. Three small sunspots appeared in the infrared continuum image, one of which showed that the infrared continuum is enhanced by 4%-6% compared to the preflare value and it almost disappeared in the continuum image for about 3 min. Near the sunspot, there appeared a hard X-ray (HXR) source, the flux of which showed a good time correlation with the profile of the continuum emission. We propose that electron precipitation followed by radiative backwarming may play the chief role in heating the sunspot.
- Publication:
-
Multi-Wavelength Investigations of Solar Activity
- Pub Date:
- 2004
- DOI:
- 10.1017/S1743921304005332
- Bibcode:
- 2004IAUS..223..119L