We summarize results of an XMM-Newton X-ray observation of the WN8h-type Wolf–Rayet star WR 66 which shows unusual 3.5–4.1 hr optical variations. One possible explanation is a compact companion (cc) which, if present, could give rise to luminous X-ray emission. WR 66 was marginally detected and its inferred X-ray luminosity (L _x ) is orders of magnitude below that expected from wind accretion onto a neutron star, but is comparable to that of the WN8h stars WR 16 and WR 124. If luminous X-ray emission from an accreting WR+cc system is present then it is absorbed and escapes detection. Other explanations of the faintly detected X-ray emission of WN8h stars are not ruled out.

我们总结了 WN8h 型沃尔夫-拉叶星 WR 66 的 XMM-牛顿 X 射线观测结果，该结果显示了不寻常的 3.5-4.1 小时光学变化。一种可能的解释是一个紧凑的伴星 (cc)，如果存在，它可能会引起发光的 X 射线发射。WR 66 被勉强探测到，其推断的 X 射线光度 ( L _x ) 比风吸积到中子星的预期低几个数量级，但与 WN8h 星 WR 16 和 WR 124 的亮度相当。如果发光的 X-存在来自吸积 WR+cc 系统的射线发射，然后它被吸收并逃脱检测。不排除对 WN8h 恒星微弱探测到的 X 射线发射的其他解释。