HARP/ACSIS：詹姆斯·克拉克·麦克斯韦望远镜上的亚毫米光谱成像系统
HARP/ACSIS: A submillimetre spectral imaging system on the James Clerk Maxwell Telescope
摘要：
本文描述了最近在詹姆斯·克拉克·麦克斯韦望远镜（JCMT）上安装和调试的新的外差阵列接收器计划（HARP）和自相关光谱成像系统（ACSIS）。16单元焦平面阵列接收器在325至375千兆赫的亚毫米波段工作，提供了高（三维）测绘速度，同时在校准和图像质量方面比单探测器对应物有显著改进。接收器温度在整个频带上为$\sim$ 120 K，并且在良好的天气条件下通常达到$\sim$ 300 K的系统温度。该系统包括一个单边带滤波器，因此这些是SSB数字。与ACSIS一起使用，该系统可以在一个或多个频率设置中以高空间和光谱分辨率迅速绘制大比例尺地图。1平方度大小的完全采样地图可以在1小时内观察到。对阵列接收器的科学需要来自于对方案的要求，即在对银河系和银河系外区域进行大规模无偏见的调查时，对具有统计意义的大小的物体的样本进行研究。与形态信息一起，新的光谱成像系统可用于研究感兴趣区域的物理和化学性质。它的三维成像能力对于湍流和动力学研究至关重要。此外，HARP/ACSIS将为宽场连续研究提供高度互补的科学方案，并为SMA和ALMA等亚毫米干涉仪进行必要的准备工作。
英文摘要：
This paper describes a new Heterodyne Array Receiver Programme (HARP) and Auto-Correlation Spectral Imaging System (ACSIS) that have recently been installed and commissioned on the James Clerk Maxwell Telescope (JCMT). The 16-element focal-plane array receiver, operating in the submillimetre from 325 to 375 GHz, offers high (three-dimensional) mapping speeds, along with significant improvements over single-detector counterparts in calibration and image quality. Receiver temperatures are $\sim$120 K across the whole band and system temperatures of $\sim$300K are reached routinely under good weather conditions. The system includes a single-sideband filter so these are SSB figures. Used in conjunction with ACSIS, the system can produce large-scale maps rapidly, in one or more frequency settings, at high spatial and spectral resolution. Fully-sampled maps of size 1 square degree can be observed in under 1 hour. The scientific need for array receivers arises from the requirement for programmes to study samples of objects of statistically significant size, in large-scale unbiased surveys of galactic and extra-galactic regions. Along with morphological information, the new spectral imaging system can be used to study the physical and chemical properties of regions of interest. Its three-dimensional imaging capabilities are critical for research into turbulence and dynamics. In addition, HARP/ACSIS will provide highly complementary science programmes to wide-field continuum studies, and produce the essential preparatory work for submillimetre interferometers such as the SMA and ALMA.
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。
