Optical confirmation and high-resolution spectroscopy of the radio jet from the symbiotic star CH Cygni.
Abstract
Spectroscopic observations of high spectral and spatial resolution of the [O III] 5007 and Hα lines from CH Cyg are presented. The data reveal a very compact emission nebulosity located about 1arcsec northwest of the star. Several arguments favour the identification of this nebulosity with a component of the radio jet ejected from the star in 1984. The observations suggest an expansion velocity of the jet of the order of 800 km s-1, a high collimation of the flow and an inclination axis of the jet nearly perpendicular to the line of sight. The jet probably originates from an accretion disk seen nearly edge-on around a compact companion of the M6 giant in an eclipsing binary system of highly eccentric orbit.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1987
- Bibcode:
- 1987A&A...180..207S
- Keywords:
-
- Eclipsing Binary Stars;
- High Resolution;
- Radio Jets (Astronomy);
- Stellar Spectra;
- Symbiotic Stars;
- Visible Spectrum;
- Accretion Disks;
- Eccentric Orbits;
- Spectral Energy Distribution;
- Astrophysics