Optical spectroscopy of V1123 Tauri and its visual companion

Gutiérrez, Carlos M.
Bibliographical reference

New Astronomy, Volume 14, Issue 2, p. 149-151.

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2
2009
Journal
Number of authors
1
IAC number of authors
1
Citations
2
Refereed citations
2
Description
We present long-slit intermediate resolution spectroscopy of the visual binary V1123. We confirm that component A is a W UMa eclipsing star with spectral type G0V, while component B is a K0V. We infer a distance to the system of 125 pc, and then a projected separation between both components of 520 AU. The difference in radial velocities of components A and B is ⩽20 km s-1. At the distance od the system, the flux measured by ROSAT for the component A, corresponds to an X-ray luminosity of Lx=30.23ergs which is within typical values for W UMa systems.
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