期刊
NATURE ASTRONOMY
卷 3, 期 1, 页码 82-87出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41550-018-0617-7
关键词
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资金
- Breakthrough Prize Foundation
- Jet Propulsion Laboratory (JPL) - NASA
- ESO programmes [097.C-0679(A), 097.C-0679(B), 299.C-5032(A), 299.C-5032(B)]
- Commonwealth of Australia
- NASA
- STFC [ST/R000964/1] Funding Source: UKRI
The massive evolved Wolf-Rayet stars sometimes occur in colliding-wind binary systems in which dust plumes are formed as a result of the collision of stellar winds(1). These structures are known to encode the parameters of the binary orbit and winds(2-4). Here we report observations of a previously undiscovered Wolf-Rayet system, 2XMM J160050.7-514245, with a spectroscopically determined wind speed of similar to 3,400 km s(-1). In the thermal infrared, the system is adorned with a prominent similar to 12 '' spiral dust plume, revealed by proper motion studies to be expanding at only similar to 570 km s(-1). As the dust and gas appear to be coeval, these observations are inconsistent with existing models of the dynamics of such colliding-wind systems(5-7). We propose that this contradiction can be resolved if the system is capable of launching extremely anisotropic winds. Near-critical stellar rotation is known to drive such winds(8,9), suggesting that this Wolf-Rayet system may be a Galactic progenitor system for long-duration gamma-ray bursts.
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