水超脉泽射电星系3C 403的最内层
The innermost region of the water megamaser radio galaxy 3C403
摘要：
活动星系核的标准统一方案要求存在高柱密度的气体和尘埃，这可能会掩盖中央引擎。到目前为止，很少有直接的亚角秒分辨率的研究，这种材料已被执行对射电星系。本文的目的是阐明原型X形Fanaroff-Riley II型射电星系3C 403的核环境，该星系是已知唯一拥有水超脉泽的强大射电星系。甚大阵列A-阵列和单碟格林银行和Effelsberg 1.3厘米的测量进行定位和监测水脉泽发射。甚长基线干涉测量6厘米连续观测被用来分析更小尺度下核环境的空间结构，而CO J=1-0和2-1跃迁则用IRAM 30米望远镜观测，以寻找空间扩展的中等密度气体成分的热发射。[删节]
英文摘要：
The standard unified scheme of active galactic nuclei requires the presence of high column densities of gas and dust potentially obscuring the central engine. So far, few direct subarcsecond resolution studies of this material have been performed toward radio galaxies. The goal of this paper is to elucidate the nuclear environment of the prototypical X-shaped Fanaroff-Riley type II radio galaxy 3C403, the only powerful radio galaxy known to host a water megamaser. Very Large Array A-array and single-dish Green Bank and Effelsberg 1.3 cm measurements were performed to locate and monitor the water maser emission. Very Long Baseline Interferometry 6 cm continuum observations were taken to analyze the spatial structure of the nuclear environment at even smaller scales, while the CO J=1-0 and 2-1 transitions were observed with the IRAM 30-m telescope to search for thermal emission from a spatially extended, moderately dense gas component.[abridged]
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