标题： 通过引力透镜在10毫弧秒分辨率下对无辐射活动类星体的观测 显示英文标题

标题： Observations of radio-quiet quasars at 10mas resolution by use of gravitational lensing

摘要： 我们介绍了对四个类星体源的四像引力透镜系统中射电辐射的VLA检测：HS0810+2554，RXJ0911+0511，HE0435$-$1223和SDSSJ0924+0219，并对其中两个系统进行了e-MERLIN观测。前三个在高显著性水平上被检测到，SDSS J0924+0219也被检测到。HS0810+2554被解析，使我们首次实现了射电安静类星体结构中的10毫角秒分辨率。其他系统未被解析或仅勉强解析。所有四个物体都是迄今为止检测到的最暗弱的射电源，其固有通量密度范围为1-5$\mu$焦耳；如果未被透镜，则只有通过平方公里阵列才能常规观测到这样的射电源。对HS0810+2554的观测（也通过e-MERLIN检测到）强烈表明存在一个小型AGN，具有射电核心和毫角秒尺度喷流。除HE0435-1223外，所有透镜图像的通量密度与没有要求模型中更小尺度次结构的平滑星系透镜模型一致，尽管在光学和射电通量密度之间观察到一些有趣的异常。这些可能是光学中的微透镜效应造成的。 显示英文摘要

摘要： We present VLA detections of radio emission in four four-image gravitational lens systems with quasar sources: HS0810+2554, RXJ0911+0511, HE0435$-$1223 and SDSSJ0924+0219, and e-MERLIN observations of two of the systems. The first three are detected at a high level of significance, and SDSS J0924+0219 is detected. HS0810+2554 is resolved, allowing us for the first time to achieve 10-mas resolution of the source frame in the structure of a radio quiet quasar. The others are unresolved or marginally resolved. All four objects are among the faintest radio sources yet detected, with intrinsic flux densities in the range 1-5$\mu$Jy; such radio objects, if unlensed, will only be observable routinely with the Square Kilometre Array. The observations of HS0810+2554, which is also detected with e-MERLIN, strongly suggest the presence of a mini-AGN, with a radio core and milliarcsecond scale jet. The flux densities of the lensed images in all but HE0435-1223 are consistent with smooth galaxy lens models without the requirement for smaller-scale substructure in the model, although some interesting anomalies are seen between optical and radio flux densities. These are probably due to microlensing effects in the optical.