论文标题
检测到超X射线源周围的无线电气泡HOLMBERG IX X-1
Detection of a Radio Bubble around the Ultraluminous X-ray Source Holmberg IX X-1
论文作者
论文摘要
我们介绍了著名的Utralumuins X射线源（ULX）Holmberg IX X-1的C和X频段无线电观察结果，此前被发现与光学发射线星云相关联，几百个范围内。我们最近对ULX的红外研究表明，射流可能导致在ULX位置检测到的红外过量。使用Karl G. Jansky进行的新无线电观察结果非常大的阵列（VLA）在B -configuration中揭示了无线电与星云的存在，其频谱斜率为-0.56，类似于其他ULX。重要的是，我们没有发现与ULX本身相关的未解决的无线电源的证据，并且我们对任何5 GHz无线电核心排放的上限设定了上限6.6 $μ$ JY（$ 4.1 \ times10^{32} $ erg S $^{ - 1} $）。这比气泡通过喷气机燃烧的时间比我们预期的20倍。如果射流存在其核心组件，则不太可能对红外过量负责，除非它是可变的。超级 - 埃德丁顿来源中预期的强风在膨胀无线电泡沫中也可能发挥重要作用。我们讨论了无线电/光气泡的可能解释，我们更喜欢类似于微Quasar SS 433的Jet+风吹气泡方案。
We present C and X-band radio observations of the famous utraluminous X-ray source (ULX) Holmberg IX X-1, previously discovered to be associated with an optical emission line nebula several hundred pc in extent. Our recent infrared study of the ULX suggested that a jet could be responsible for the infrared excess detected at the ULX position. The new radio observations, performed using the Karl G. Jansky Very Large Array (VLA) in B-configuration, reveal the presence of a radio counterpart to the nebula with a spectral slope of -0.56 similar to other ULXs. Importantly, we find no evidence for an unresolved radio source associated with the ULX itself, and we set an upper limit on any 5 GHz radio core emission of 6.6 $μ$Jy ($4.1\times10^{32}$ erg s$^{-1}$). This is 20 times fainter than what we expect if the bubble is energized by a jet. If a jet exists its core component is unlikely to be responsible for the infrared excess unless it is variable. Strong winds which are expected in super-Eddington sources could also play an important role in inflating the radio bubble. We discuss possible interpretations of the radio/optical bubble and we prefer the jet+winds-blown bubble scenario similar to the microquasar SS 433.
