First spatial resolution of the stellar components of the interacting binary CH Cygni

Abstract

We report the first resolved bispectrum speckle interferometry of the symbiotic binary CH Cyg. The measured component separation, $\rho =42\pm 2$ mas, is consistent with the one derived from the known spectroscopic orbit and distance. In particular, our result implies a total mass of the binary of $M_{\rm t}=M_{\rm g}+M_{\rm wd}=3.7^{+3.5}_{-1.7} \rm M_{\sun}$, which is in good agreement with the value $M_{\rm t}=2.7^{+1.2}_{-0.6} \rm M_{\sun}$ derived from the spectroscopic orbit solution for the red giant and evolutionary contraints. We also show that the radio jets and the bipolar outflow are not orthogonal to the orbital plane of the binary system.

5 pages, 4 figures, submitted to MNRAS

References in corpus (5)

• CH Cyg X-ray Jet Activity and Multi-component Structures
• The spectroscopic orbit and the geometry of R Aqr
• Infrared Spectroscopy of Symbiotic Stars. VII. Binary Orbit and Long Secondary Period Variability of CH Cygni
• Discovery of Rapid Hard X-ray Variability and New Jet Activity in the Symbiotic Binary R Aqr
• Detection of non-radial pulsation and faint companion in the symbiotic star CH Cyg

Cited by in corpus (1)

• Chemical abundance analysis of symbiotic giants. Metallicity and CNO abundance patterns in 14 northern S-type systems