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Far-ultraviolet Spectroscopy of O+o Binaries in the Magellanic CloudsWe report FUSE observations in 2006 of three O-type, double-lined spectroscopic binaries in the Magellanic Clouds. Their binary nature was discovered only in the past several years. The systems have very short periods (1.4 - 2.25 days), represent rare, young evolutionary stages of massive stars and binaries, and provide a unique glimpse at some of the most massive systems that form in dense clusters of massive stars. The systems are: LH54-425 in the LMC (O3IIIf + O6V, P=2.25 days, approx. 100+50 Mo), J053441-693139 in the LMC (O2-31f + O6V, P=1.4 days, 41+27 Mo), and Hodge 53-47 in the SMC (O6V + O4-5IIIf, P=2.2 days, 24+14 Mo, where the O4 star appears to be less massive than the O6 star). These represent some of the most massive binaries known. Their short periods indicates that wind interaction and mass transfer are likely important factors in their evolution. The spectra provide quantitative and systematic studies of phase-dependent stellar wind properties, wind collision effects in O+O binaries at lower metallicities, improved radial velocity curves, and FUV spectrophotometric changes as a function of orbital phase.
Document ID
20070022855
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Sonneborn, George
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Iping, R. C.
Gies, D.
(Georgia State Univ. Atlanta, GA, United States)
Vander Hucht, K.
(Space Research Organization Netherlands Groningen, Netherlands)
Kaper, L.
(Amsterdam Univ. Netherlands)
Date Acquired
August 23, 2013
Publication Date
May 27, 2007
Subject Category
Astronomy
Meeting Information
Meeting: American Astronomical Society 210th Meeting
Location: Honolulu, HI
Country: United States
Start Date: May 27, 2007
End Date: May 31, 2007
Sponsors: American Astronomical Society
Distribution Limits
Public
Copyright
Other

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