Optical spectrum and variability of KR Aur.
Abstract
Results are reported for spectral, UBV photoelectric photometric, and spectrophotometric observations of the variable star KR Aur. It is found that the continuum energy distribution of the star can be represented by a power law with an exponent of zero to 0.4, that the full width at half maximum of the H-alpha line is about 900 km/s, and that the H-alpha flux is approximately 4 by 10 to the -13th power erg/sq cm per sec. Continuum variability is observed on time scales of several hours (U amplitude of about 0.6 magnitude) to several tens of seconds (U amplitude of about 0.4 magnitude). KR Aur is shown to resemble the X-ray source Sco X-1 and certain dwarf-containing close binary systems in terms of the nature of its variability and its optical continuum energy distribution.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- November 1977
- Bibcode:
- 1977PAZh....3..510D
- Keywords:
-
- Continuous Spectra;
- Spectral Energy Distribution;
- Stellar Spectrophotometry;
- Ubv Spectra;
- Variable Stars;
- Electrophotometry;
- Emission Spectra;
- H Alpha Line;
- X Ray Sources;
- Astrophysics;
- Intrinsic Variables;
- Spectrum Variables;
- Flare Stars;
- Pulsation Theory