Masses of the astrometric SB2 \zeta Ori A

Authors :: Rivinius, Th.
Hummel, C. A.
Stahl, O.
Publication Year :: 2010
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.<br />Comment: 2 pages, 1 figure, IAUS 272 - Active OB Stars: Structure, Evolution, Mass Loss and Critical Limits