标题： HST和MERLIN对3C273喷流的观测 显示英文标题

标题： HST and MERLIN Observations of the Jet in 3C273

摘要： 我们展示了利用哈勃空间望远镜上的WFPC2获得的类星体3C273喷流的红蓝图像，以及使用MERLIN阵列制作的新射电图。 这些图像的质量明显优于以前的数据。 两张图的对齐精度达到0.020$''$; 这种精度是由于类星体和喷流都包含在射电和光学图像中。 光学喷流的起点由一个拉长的云团标记，在射电和光学波长下看起来相同。 光学喷流中的其他云团对应于射电轮廓内的狭窄斜向特征。 光学喷流中平滑辐射的总宽度约为$0.7''$; 光学云团的FWHM约为$0.3''$。 这些云团可能追踪位于较旧射电茧轮廓内的狭窄、可能是螺旋状喷流的当前位置。 显示英文摘要

摘要： We present red and blue images of the jet of the quasar 3C273 obtained with the WFPC2 on the Hubble Space Telescope as well as a new radio map made with the MERLIN array. The images are of significantly better quality than that of previous data. The two maps are aligned to an accuracy of 0.020$''$; this accuracy is achieved because both the quasar and the jet are contained in both the radio and optical images. The start of the optical jet is marked by an elongated knot which appears identical at radio and optical wavelengths. Other knots in the optical jet correspond to narrow oblique features within the radio outline. The total width of the smooth emission in the optical jet is~$0.7''$; the FWHM of the optical knots is~$0.3''$. The knots may trace the current location of a narrow, perhaps helical jet lying within the outlines of the older radio cocoon.