Masses of the astrometric SB2 \zeta Ori A
Th. Rivinius, C.A. Hummel, O. Stahl
TL;DR
This paper reports the first direct dynamical mass measurement of an O-type supergiant star in a resolved spectroscopic binary system, providing valuable data for stellar evolution models.
Contribution
It presents the first dynamic mass measurement for an O-type supergiant in a resolved SB2 system, enabling comparison with single star evolutionary tracks.
Findings
Mass of ta Ori A determined for the first time
System shows no evidence of past mass transfer
Results support current stellar evolution models
Abstract
We report the first dynamic mass for an O-type supergiant, the interferometrically resolved SB2 system \zeta Ori A (O9.5Ib+B0/1). The separation of the system excludes any previous mass-transfer, ensuring that the derived masses can be compared to single star evolutionary tracks.
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