On the absolute energy distributions of the sun, of the "solar analogs" 16 Cyg B, 16 Cyg A, VB 64 and of Vega.
Abstract
The internal errors and overall accuracy of the disk-center and disk-averaged solar spectra of Neckel and Labs (1984) are analyzed; the absolute solar flux spectrum is compared with the predictions of the Kurucz (1979) model and with the absolute spectra of four solar analogs; and the physical parameters of 16 Cyg A and B are discussed. The results are presented in graphs and tables and characterized. Error waves of amplitude less than 1 percent are found in the spectra of the sun and Vega. Assuming an orbital period of less than 200,000 yr and a radial velocity of about 1 km/s for 16 Cyg A/B, the upper limit of its distance is estimated as 23 pc, corresponding to an absolute magnitude of 4.4 or fainter for 16 Cyg B.
- Publication:
-
Highlights of Astronomy
- Pub Date:
- 1986
- Bibcode:
- 1986HiA.....7..863N
- Keywords:
-
- Solar Radiation;
- Solar Spectra;
- Spectral Energy Distribution;
- Accuracy;
- Cygnus Constellation;
- Stellar Orbits;
- Stellar Spectra;
- Astrophysics;
- Solar-Type Stars:Energy Distribution;
- Sun:Energy Distribution