CHIRON radial velocity of V907 Sco system components

In spite of its peculiarity, observational data on this system are surprisingly scarce. Here we make use of the recent Transiting Exoplanet Survey Satellite observations, as well as our own photometric and spectroscopic data, to expand the overall data set and study the V907Sco system in more detail.

Our analysis provides both new and improved values for several of its fundamental parameters: (I) the masses of the stars in the eclipsing binary are 2.74{+/-}0.02M{sun} and 2.56{+/-}0.02M{sun}; and (II) the third component is a solar-type star with mass 1.06_-0.10_^+0.11^M{sun} (90% C.L.), orbiting the binary on an elongated orbit with an eccentricity of 0.47{+/-}0.02 and a period of 142.01{+/-}0.05days. The intermittent intervals of time when eclipses of the inner binary are switched on and off are caused by a mutual 26.2{deg}_-2.2_^+2.6^ inclination of the inner- and outer-orbit planes, and a favorable inclination of about 71{deg} of the total angular momentum of the system.