Observations of Photospheric Faculae at the Center of the Solar Disk
Abstract
Observations, in the near UV with very high spatial resolution, obtained with the Sacramento Peak Vacuum Tower Telescope, show that photospheric faculae are visible near the center of the disk. Faculae consist of bright point-like structures with typical dimensions of 100-200 km, and appear to be concentrated in the intergranular space. Preliminary results on measurements of size, brightness, life time, and on interaction of facular structures with granulation are presented, which support the view that faculae are identical with the recently discovered `solar filigree.' Phenomenological arguments are discussed concerning the suggestion that facular points may represent magnetic flux concentrations in the photosphere.
- Publication:
-
Solar Physics
- Pub Date:
- September 1974
- DOI:
- 10.1007/BF00161822
- Bibcode:
- 1974SoPh...38...43M
- Keywords:
-
- Faculae;
- Fine Structure;
- Photosphere;
- Solar Granulation;
- Ultraviolet Photography;
- Near Ultraviolet Radiation;
- Optical Filters;
- Solar Atmosphere;
- Solar Limb;
- Solar Magnetic Field;
- Ultraviolet Spectra;
- Solar Physics;
- Magnetic Flux;
- High Spatial Resolution;
- Life Time;
- Typical Dimension;
- Solar Disk