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Two Remarkable Spectroscopic Categories of Young O Stars from the VLT-FLAMES Tarantula Survey
Nolan R. Walborn, Hugues Sana, William D. Taylor +2
The spectral and spatial characteristics of two special categories of O stars found in the VFTS dataset are presented. One of them comprises very rapid rotators, including several…
The VLT-FLAMES Tarantula Survey: The fastest rotating O-type star and shortest period LMC pulsar - remnants of a supernova disrupted binary?
P. L. Dufton, P. R. Dunstall, C. J. Evans +12
We present a spectroscopic analysis of an extremely rapidly rotating late O-type star, VFTS102, observed during a spectroscopic survey of 30 Doradus. VFTS102 has a projected rotati…
On the Mass-Loss Rates of Massive Stars in the Low-Metallicity Galaxies IC 1613, WLM and NGC 3109
F. Tramper, H. Sana, A. de Koter +1
We present a spectroscopic analysis of VLT/X-Shooter observations of six O-type stars in the low-metallicity (Z ~ 1/7 Z\odot) galaxies IC 1613, WLM and NGC 3109. The stellar and wi…
The massive star binary fraction in young open clusters - III. IC 2944 and the Cen OB2 association
H. Sana, G. James, E. Gosset
Using an extended set of multi-epoch high-resolution high signal-to-noise ratio optical spectra, we readdress the multiplicity properties of the O-type stars in IC 2944 and in the…
A spectroscopic investigation of early-type stars in the young open cluster Westerlund 2
Gregor Rauw, Hugues Sana, Yaël Nazé
The distance of the very young open cluster Westerlund 2, which contains the very massive binary system WR 20a and is likely associated with a TeV source, has been the subject of m…
The Intermediate-mass Young Stellar Object 08576nr292: Discovery of a disk-jet system
Lucas E. Ellerbroek, Lex Kaper, Arjan Bik +5
We present observations of the embedded massive young stellar object (YSO) candidate 08576nr292, obtained with X-shooter and SINFONI on the ESO Very Large Telescope (VLT). The flux…