GCIRS16SW: a massive eclipsing binary in the Galactic Center

Details GCIRS16SW: a massive eclipsing binary in the Galactic Center GCIRS16SW: a massive eclipsing binary in the Galactic Center

2006-08-10

arxiv.org/abs/astro-ph/0608215v1

Astrophys.J.649:L103-L106,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, ApJ Letters accepted

Scientific paper

10.1086/508328

We report on the spectroscopic monitoring of GCIRS16SW, an Ofpe/WN9 star and LBV candidate in the central parsec of the Galaxy. SINFONI observations show strong daily spectroscopic changes in the K band. Radial velocities are derived from the HeI 2.112 um line complex and vary regularly with a period of 19.45 days, indicating that the star is most likely an eclipsing binary. Under various assumptions, we are able to derive a mass of ~ 50 Msun for each component.

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