Optical spectroscopy of V1123 Tauri and its visual companion

Details Optical spectroscopy of V1123 Tauri and its visual companion Optical spectroscopy of V1123 Tauri and its visual companion

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009newa...14..149g&link_type=abstract

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

Astronomy and Astrophysics

Astronomy

1

97.80.Di, 97.80.Hn, 97.80.Kq

Scientific paper

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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