Vink 2010 对麦哲伦云的WR星的观测

主要内容:
可能对伽马暴的前身星的研究提供帮助。

精彩摘抄:
一个旋转大质量恒星的示意结构图

星风损失率和宿主星系金属丰度的关系

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Title:		Spectropolarimetry of Wolf–Rayet Stars in the Magellanic Clouds: Constraining the Progenitors of Gamma-ray Bursts
Authors:		Vink, J.
Affiliation:		AA(Armagh Observatory, College Hill, Northern Ireland, United Kingdom)
Publication:		The Messenger, vol. 140, p. 46-49 (Msngr Homepage)
Publication Date:		06/2010
Origin:		ESO
Bibliographic Code:		2010Msngr.140...46V

Abstract

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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