Wolf–Rayet (WR) stars are evolved massive stars, presumably on their way to becoming supernovae. They are characterized by high luminosities and fast and dense stellar winds. We have detected signs of a radio continuum pinwheel associated with WR 147, a nitrogen-rich WR star with spectral subtype WN8. These structures are known to exist around a handful of late-type carbon-rich WR stars with massive companions where dust has formed in the zone where the two winds collide and produced a plume of dense gas and dust that is carried out with the WR wind. As the binary system rotates, an Archimedean spiral detectable in the infrared is formed. The resulting pinwheel contains information on wind speeds, wind-momentum ratio, and orbital parameters. However, WR 147 is a WN star and the formation of dust is unlikely, so a different emission mechanism must be at work. Our analysis of the data suggests that in this case the emission is dominantly of a nonthermal nature (synchrotron), altho...

中文翻译：

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WR 147发出的无线电风车

沃尔夫·雷耶特（WR）恒星是进化的大质量恒星，大概是在成为超新星的过程中。它们的特点是发光度高，恒星风快速且密集。我们已经检测到与WR 147相关联的无线电连续风车的迹象，WR 147是具有光谱子类型WN8的富氮WR星。已知这些结构存在于少数具有大量伴星的晚型富碳WR恒星周围，在这两个风相撞的区域中形成了尘埃，并产生了由WR风带走的密集气体和尘埃羽流。随着二元系统的旋转，形成了可在红外下检测到的阿基米德螺线。产生的风车包含有关风速，风动比和轨道参数的信息。但是，WR 147是WN星，因此不太可能形成尘埃，因此必须使用不同的排放机制。我们对数据的分析表明，在这种情况下，辐射主要是非热性质的（同步辐射），等等。