Stellar absolute fluxes and energy distributions from 0.32 to 4.0 μm.
Abstract
Recent progress is reviewed in the calibration of absolute fluxes and energy distributions in the visual and IR parts of the spectrum. The absolute fluxes and energy distributions of stars are the foundation of the calibration of fundamental effective temperatures and bolometric corrections. In the visual, the calibration of the absolute flux and energy distribution of Vega as settled down well, and the remaining difficulties include the lack of a worldwide common list of brighter secondary standard stars, the lack of enough satisfactory fainter secondary standard stars, and the possbility of variability in Vega. In the IR, the process of arriving at a dependable and accurate calibration, and linking it to commonly used photometric systems is in its infancy. A final and rather special problem is the question of the calibration of the sun. The sun is a special case because it is so well studied astrophysically and because its extreme brightness makes it very difficult to calibrate photometrically.
- Publication:
-
Calibration of Fundamental Stellar Quantities
- Pub Date:
- 1985
- Bibcode:
- 1985IAUS..111..225H
- Keywords:
-
- Calibrating;
- Infrared Photometry;
- Infrared Spectra;
- Radiant Flux Density;
- Spectral Energy Distribution;
- Stellar Spectrophotometry;
- Reference Stars;
- Solar Flux;
- Solar Spectra;
- Astrophysics;
- Standard Stars:Energy Distribution;
- Sun:Energy Distribution