论文标题
Maveric调查：来自澳大利亚望远镜紧凑型阵列的南部球状簇的无线电目录
The MAVERIC survey: A catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array
论文作者
论文摘要
与典型的X射线或光学研究相比，无线电连续观测为球形簇中的紧凑物体提供了新的窗口。作为Maveric调查的一部分，我们使用澳大利亚望远镜紧凑型阵列进行了对26个南部球状簇的26个南部球状簇的无线电连续性调查，以5.5和9.0 GHz进行了无线电连续调查。本文介绍了这26个簇的领域中的1285个无线电连续源的目录。考虑到背景源的表面密度，我们发现了26个簇中有7个无线电源的大量证据，还发现至少11个先前已知的紧凑型物体（6个脉冲星和5个X射线二进制物）。虽然在典型的球状簇中，无线电连续源的总密度大于大约20 microjy，但该调查已经导致发现了几种令人兴奋的紧凑型二进制室，其中包括47 TUC中的候选超级型黑洞X射线X射线。集群中心附近的许多未分类的无线电来源可能是真正的群集来源，并且需要进行多波长的随访，以对这些对象进行分类并更好地理解在球状簇中积聚紧凑的二进制文件的人口统计学。
Radio continuum observations offer a new window on compact objects in globular clusters compared to typical X-ray or optical studies. As part of the MAVERIC survey, we have used the Australia Telescope Compact Array to carry out a deep (median central noise level of approximately 4 microJy per beam) radio continuum survey of 26 southern globular clusters at central frequencies of 5.5 and 9.0 GHz. This paper presents a catalogue of 1285 radio continuum sources in the fields of these 26 clusters. Considering the surface density of background sources, we find significant evidence for a population of radio sources in seven of the 26 clusters, and also identify at least 11 previously known compact objects (6 pulsars and 5 X-ray binaries). While the overall density of radio continuum sources with 7.25-GHz flux densities greater than about 20 microJy in typical globular clusters is relatively low, the survey has already led to the discovery of several exciting compact binaries, including a candidate ultracompact black hole X-ray binary in 47 Tuc. Many of the unclassified radio sources near the centres of the clusters are likely to be true cluster sources, and multi-wavelength follow-up will be necessary to classify these objects and better understand the demographics of accreting compact binaries in globular clusters.
