UV Spectroscopy of Metal-Poor Massive Stars in the Small Magellanic Cloud

Details UV Spectroscopy of Metal-Poor Massive Stars in the Small Magellanic Cloud UV Spectroscopy of Metal-Poor Massive Stars in the Small Magellanic Cloud

2007-07-16

arxiv.org/abs/0707.2334v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. To appear in 'The Impact of HST on European Astronomy', Eds., G. De Marchi & F.D. Macchetto, Astrophysics

Scientific paper

The Hubble Space Telescope has provided the first clear evidence for weaker winds of metal-poor massive stars in the Small Magellanic Cloud, confirming theoretical predictions of the metallicity dependence of mass-loss rates and wind terminal velocities. For lower luminosity O-type stars however, derived mass-loss rates are orders of magnitude lower than predicted, and are at present unexplained.

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