Paper:	Revisiting Three Blue Straggler Binaries
Volume:	482, 10th Pacific Rim Conference on Stellar Astrophysics
Page:	271
Authors:	Wang, X.; Ren, S.
Abstract:	For blue stragglers in binary systems, two kinds of origin mechanisms, i.e., collision and mass transfer, are theoretically predicted and companion mass is one of the most important probes to distinguish their origin mechanisms. By fitting the revised Hipparcos Intermediate Astrometric Data, we obtain the astrometric orbits of three single-lined spectroscopic binaries (HIP 39903, 55022, and 59750) with blue stragglers. On the basis of the obtained orbits and blue straggler masses estimated from stellar evolutionary model, their companion masses are computed. The values of the companion masses (0.44, 0.47, and 0.44 M☉) suggest that all these three blue stragglers are originated from the mass transfer mechanism.

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