A first observation of the chromospheric spectrum of the dzeta Aurigae binary HR 6902.
Abstract
Spectroscopy of the composite-spectrum binary HR 6902 around the time of total eclipse reveals absorption features that are due to the chromosphere of the G9 II primary star. By applying a method of digital subtraction of spectra the author has succeeded in isolating those features. This paper presents a description and measurements of the chromospheric spectrum of HR 6902A in the wavelength region λλ3650 - 4450 Å. From a study of the spectra at ingress and egress the author attempts to elucidate the geometry of the eclipse and to derive the rotation period of the G9 II star.
- Publication:
-
Journal of the Royal Astronomical Society of Canada
- Pub Date:
- April 1988
- Bibcode:
- 1988JRASC..82...49G
- Keywords:
-
- Chromosphere;
- Eclipsing Binary Stars;
- Spectrum Analysis;
- Stellar Spectra;
- Ultraviolet Spectra;
- Zeta Aurigae Star;
- Astronomical Spectroscopy;
- Near Ultraviolet Radiation;
- Stellar Rotation;
- Astrophysics