Coronal Bright Points at 6 and 20 Centimeter Wavelengths
Abstract
The paper presents the results of near-simultaneous observations of bright points at 6 and 20 cm for a time interval of 10 hr using the VLA. It is shown that, at both 6 and 20 cm, the radio sources in the quiet sun have a very close association with bipolar features seen in magnetograms and with dark features in He I 10830 A spectroheliograms. The paper discusses the associations and the distributions of size, brightness, and temporal variation of the microwave bright points. It is found that the brightness temperatures of the 6 and 20 cm bright points are in the approximate ratio 0.09:1 expected from the emission mechanism being thermal bremsstrahlung.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1988
- DOI:
- 10.1086/166062
- Bibcode:
- 1988ApJ...325..905K
- Keywords:
-
- Centimeter Waves;
- Radio Waves;
- Solar Corona;
- Solar Radiation;
- Solar X-Rays;
- Very Large Array (Vla);
- Computational Astrophysics;
- H I Regions;
- Solar Magnetic Field;
- Solar Physics;
- SUN: CORONA;
- SUN: RADIO RADIATION;
- SUN: X-RAYS