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Zoekopdracht: faculteit: "FNWI" en publicatiejaar: "2010"

AuteursC.J. Evans, N.R. Walborn, P.A. Crowther, V. Hénault-Brunet, D. Massa, W.D. Taylor, I.D. Howarth, H. Sana, D.J. Lennon, J.T. van Loon
TitelA massive runaway star from 30 Doradus
TijdschriftAstrophysical Journal Letters
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Astronomical Institute Anton Pannekoek (IAP)
SamenvattingWe present the first ultraviolet (UV) and multi-epoch optical spectroscopy of 30 Dor 016, a massive O2-type star on the periphery of 30 Doradus in the Large Magellanic Cloud. The UV data were obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope as part of the Servicing Mission Observatory Verification program after Servicing Mission 4, and reveal #016 to have one of the fastest stellar winds known. From analysis of the C IV lambda lambda 1548-51 doublet we find a terminal velocity, v(infinity) = 3450 +/- 50 km s(-1). Optical spectroscopy is from the VLT-FLAMES Tarantula Survey, from which we rule out a massive companion (with 2 days < P < 1 yr) to a confidence of 98%. The radial velocity of #016 is offset from the systemic value by -85 km s(-1), suggesting that the star has traveled the 120 pc from the core of 30 Doradus as a runaway, ejected via dynamical interactions.
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