Limb Brightening and Dark Features Observed at 6cm Wavelength
Abstract
Summary. Radio maps of the sun at 6 cm wavelength were obtained using the 100 m-telescope near Bonn (HPBW =2.6') during 7 days. The most interesting features present on these maps are: a) limb brightening of about 15 % without deconvolution, and b) depression zones correlated with filaments. The combination of both observations allows to determine the electron density of the low corona and leads to the conclusion that there is a transition region between filament and the surrounding corona. Key words: solar limb brightening filaments
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1975
- Bibcode:
- 1975A&A....39..429C