HARP/ACSIS: a submillimetre spectral imaging system on the James Clerk Maxwell Telescope
HARP/ACSIS: a submillimetre spectral imaging system on the James Clerk Maxwell Telescope
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DOI：
10.1111/j.1365-2966.2009.15347.x
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发表时间：
2009-07
影响因子：
4.8
通讯作者：
J. Buckle;R. Hills;Henry Smith;W. R. F. Dent;Graham S. Bell;E. Curtis;Roger Dace;Hugh Gibson;S. Graves;J. Leech;J. Richer;R. Williamson;S. Withington;G. Yassin;Richard J. Bennett;P. Hastings;I. Laidlaw;J. Lightfoot;T. Burgess;P. Dewdney;G. Hovey;A. Willis;R. O. Redman;B. Wooff;D. Berry;B. Cavanagh;Gary R. Davis;J. Dempsey;P. Friberg;T. Jenness;R. Kackley;N. Rees;R. Tilanus;C. Walther;W. Zwart;T. Klapwijk;M. Kroug;T. Zijlstra
中科院分区：
文献类型：
--
作者：
J. Buckle;R. Hills;Henry Smith;W. R. F. Dent;Graham S. Bell;E. Curtis;Roger Dace;Hugh Gibson;S. Graves;J. Leech;J. Richer;R. Williamson;S. Withington;G. Yassin;Richard J. Bennett;P. Hastings;I. Laidlaw;J. Lightfoot;T. Burgess;P. Dewdney;G. Hovey;A. Willis;R. O. Redman;B. Wooff;D. Berry;B. Cavanagh;Gary R. Davis;J. Dempsey;P. Friberg;T. Jenness;R. Kackley;N. Rees;R. Tilanus;C. Walther;W. Zwart;T. Klapwijk;M. Kroug;T. Zijlstra
本文介绍了一个新的外差阵列接收机计划（HARP）和自相关光谱成像系统（ACSIS），最近安装和詹姆斯克拉克麦克斯韦望远镜（JCMT）的委托。16单元焦平面阵列接收器工作在325至375千兆赫的亚毫米波段，提供了很高的（三维）绘图速度，沿着在校准和图像质量方面比单探测器接收器有显著改进。接收器温度在整个波段为120 K，在良好的天气条件下，系统温度通常达到300 K。该系统包括一个单边带滤波器，因此这些是SSB数字。与ACSIS结合使用，该系统可以在一个或多个频率设置中以高空间和频谱分辨率迅速制作大比例尺地图。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。沿着形态学信息，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将为宽场连续体研究提供高度互补的科学计划，并为SMA和阿尔马等亚毫米干涉仪进行必要的准备工作。
This paper describes a new Heterodyne Array Receiver Programme (HARP) and AutoCorrelation 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 120 K across the whole band and system temperatures of 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.