Spectropolarimetry of Wolf-Rayet Stars in the Magellanic Clouds: Constraining the Progenitors of Gamma-ray Bursts

Details Spectropolarimetry of Wolf-Rayet Stars in the Magellanic Clouds: Constraining the Progenitors of Gamma-ray Bursts Spectropolarimetry of Wolf-Rayet Stars in the Magellanic Clouds: Constraining the Progenitors of Gamma-ray Bursts

2010-07-25

arxiv.org/abs/1007.4336v1

ESO The Messenger, 2010, vol. 140, p. 46-49

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

PDF file (4 pages, 7 figs) ESO Messenger

Scientific paper

Wolf-Rayet stars have been identified as objects in their final phase of massive star evolution. It has been suggested that Wolf-Rayet stars are the progenitors of long-duration gamma ray bursts in low metallicity environments. However, this deduction has yet to be proven. Here we report on our initial results from a VLT/FORS linear spectropolarimetry survey of Wolf-Rayet stars in the Magellanic Clouds, which is intended to constrain the physical criteria - such as weaker stellar winds, rapid rotation, and associated asymmetry - of the collapsar model. Finally, we provide an outlook for polarisation studies with an extremely large telescope.

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