高分辨率、宽视场、窄带、快照成像
High Resolution, Wide Field, Narrow Band, Snapshot Imaging
摘要：
研究了干涉阵列在宽视场、高分辨率、窄带、快拍成像情况下的成像性能。我们发现，当紫外线电池的尺寸足够小（即。图像尺寸足够大），每个瞬时可见度记录被网格化到其自己的UV单元中。这甚至适用于密集阵列，如下一代VLA的核心。在这个特定的应用中，网格化的Vibrations的均匀加权接近自然加权，其通常对所得的合成波束产生有害的后果。对于一个核心为主的阵列，我们表明，由此产生的图像噪声是高度相关的规模相当于核心基线的空间频率。在一般情况下，这项研究强调的事实是，对于成像应用，需要高分辨率（平原阵列和更大），许多核心天线可以作为一个单独的子阵列低分辨率的科学，而不牺牲高分辨率的科学质量。
英文摘要：
We investigate the imaging performance of an interferometric array in the case of wide field, high resolution, narrow band, snapshot imaging. We find that, when uv-cell sizes are sufficiently small (ie. image sizes are sufficiently large), each instantaneous visibility record is gridded into its own uv-cell. This holds even for dense arrays, like the core of the next generation VLA. In this particular, application, Uniform weighting of the gridded visibilities approaches Natural weighting, with its often deleterious consequences on the resulting synthesized beam. For a core-dominated array, we show that the resulting image noise is highly correlated on scales comparable to the spatial frequencies of the core baselines. In general, this study accentuates the fact that, for imaging applications that require high resolution (Plains array and greater), many of the core antennas can be employed as a separate subarray for low resolution science, without sacrificing the quality of the high resolution science.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
