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Title: Wolf–Rayet stars as gamma-ray burst progenitors
Authors: Langer, Norbert ×
van Marle, Allard Jan
Yoon, Sung-Chul #
Issue Date: Mar-2010
Publisher: Elsevier Science
Series Title: New Astronomy Reviews vol:54 issue:3-6 pages:206-210
Abstract: The collapsar scenario for long gamma-ray bursts requires rapidly rotating Wolf–Rayet stars as progenitor stars. We highlight two possible ways out of the dilemma that the strong winds of Wolf–Rayet lead to a fast spin-down. One way is to restrict the duration of the Wolf–Rayet phase to a short time span at the end of the star’s evolution. We show that this appears to apply to GRB 021004. The other way is to choose a sub-solar metallicity, thus limiting the Wolf–Rayet wind efficiency. We discuss corresponding stellar evolution models and show that a metallicity limit of about 1/10th solar, as it is required by the models, may be consistent with the empirical gamma-ray burst rate.
ISSN: 1387-6473
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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