EDP Sciences
Free access
Volume 505, Number 2, October II 2009
Page(s) 743 - 753
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361/200912610
Published online 03 August 2009
A&A 505, 743-753 (2009)
DOI: 10.1051/0004-6361/200912610

On the presence and absence of disks around O-type stars

Jorick S. Vink1, B. Davies2, 3, T. J. Harries4, R. D. Oudmaijer2, and N. R. Walborn5

1  Armagh Observatory, College Hill, Armagh BT61 9DG, Northern Ireland, UK
    e-mail: jsv@arm.ac.uk
2  The School of Physics and Astronomy, EC Stoner Building, The University of Leeds, Leeds LS2 9JT, UK
3  Chester F. Carlson Center for Imaging Science, Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623, USA
4  School of Physics, University of Exeter, Exeter EX4 4QL, UK
5  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

Received 01 June 2009 / Accepted 24 July 2009

As the favoured progenitors of long-duration gamma-ray bursts, massive stars may represent our best signposts of individual objects in the early Universe, but special conditions seem required to make these bursters. These are thought to originate from the progenitor's rapid rotation and associated asymmetry.

Key words: stars: chemically peculiar -- polarization -- stars: winds, outflows -- supergiants -- stars: formation -- circumstellar matter

© ESO 2009