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arxiv: astro-ph/0608215 · v1 · pith:NS2FTRNVnew · submitted 2006-08-10 · 🌌 astro-ph

GCIRS16SW: a massive eclipsing binary in the Galactic Center

F. Martins (1) , S. Trippe (1) , T. Paumard (1) , T. Ott (1) , R. Genzel (1 , 2) , G. Rauw (3) , F. Eisenhauer (1)
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S. Gillessen (1) H. Maness (2) R. Abuter (4) ((1) MPE (2) Univ. California (3) Univ. Liege (4) ESO)
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keywords binaryeclipsinggcirs16swspectroscopicstarableassumptionsband
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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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