Simultaneous Observations of 20 Centimeter Bright Points and He i 10830 Angstrom Dark Points in the Quiet Sun
Abstract
The authors present the results of the first simultaneous observations of the quiet Sun made at the 20 cm radio wavelength and in the He I λ10830 line. Simultaneous magnetic field measurements were also obtained with lower time resolution during the five consecutive hours of observations. In the 512arcsec×512arcsec common observing field of view the authors find that the 20 cm radio emisison, which originates from the low corona-transition region, is always associated with regions of enhances He I absorption; yet, it does not always coincide with strong He I λ10830 absorption regions known as He I "dark points". The temporal changes of the 20 cm emission and the underlying He I absorption are also studied.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1988
- DOI:
- 10.1086/166156
- Bibcode:
- 1988ApJ...326..988H
- Keywords:
-
- Centimeter Waves;
- Magnetic Flux;
- Solar Corona;
- Solar Magnetic Field;
- Solar Radio Emission;
- Line Of Sight;
- Magnetic Field Configurations;
- Radio Astronomy;
- X Ray Sources;
- Solar Physics;
- SUN: CORONA;
- SUN: MAGNETIC FIELDS;
- SUN: RADIO RADIATION