[en] We report on the spectroscopic monitoring of GCIRS 16SW, 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 He I 2.112 mu m 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 similar to 50 M circle dot for each component.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Martins, F.
Trippe, S.
Paumard, T.
Ott, T.
Genzel, R.
Rauw, Grégor ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Eisenhauer, F.
Gillessen, S.
Maness, H.
Abuter, R.
Language :
English
Title :
GCIRS 16SW: A massive eclipsing binary in the Galactic center
Publication date :
01 October 2006
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
Univ Chicago Press, Chicago, United States - Illinois
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