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arXiv 0704.2641astro-ph
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利用亚毫米波阵列实现691 GHz的相位闭合

Phase Closure at 691 GHz using the Submillimeter Array

T. R. Hunter, A. E. T. Schinckel, A. B. Peck, R. D. Christensen, R. Blundell, A. Camacho, F. Patt, K. Sakamoto, K. H. Young

摘要:

在682 GHz和691 GHz的相位闭合首先使用位于夏威夷莫纳克亚山的亚毫米阵列(SMA)干涉仪的三个天线实现。最初,在2010年9月21日,在682.5 GHz处证明了相位闭合。19,2002使用人造地面“信标”信号。随后,在2009年9月21日,在所有三个基线上以CO(6-5)跃迁的频率(691.473 GHz)对土星和天王星进行了天文探测。2002年22日。虽然较大的行星,如土星,即使在这些短基线(25.2米,25.2米和16.4米)上也能得到很好的解析,但天王星和木卫四的相位闭合是实现的。这是第一次成功的实验,以获得在该频段的相位关闭。在猎户座BN/KL和其他银河系源也探测到了CO(6-5)谱线,还有朝向演化恒星的振动激发的658 GHz水脉泽谱线。我们提出了这些历史性的检测,以及在这个频段获得的第一个角秒尺度的图像。

英文摘要:

Phase closure at 682 GHz and 691 GHz was first achieved using three antennas of the Submillimeter Array (SMA) interferometer located on Mauna Kea, Hawaii. Initially, phase closure was demonstrated at 682.5 GHz on Sept. 19, 2002 using an artificial ground-based "beacon" signal. Subsequently, astronomical detections of both Saturn and Uranus were made at the frequency of the CO(6-5) transition (691.473 GHz) on all three baselines on Sept. 22, 2002. While the larger planets such as Saturn are heavily resolved even on these short baselines (25.2m, 25.2m and 16.4m), phase closure was achieved on Uranus and Callisto. This was the first successful experiment to obtain phase closure in this frequency band. The CO(6-5) line was also detected towards Orion BN/KL and other Galactic sources, as was the vibrationally-excited 658 GHz water maser line toward evolved stars. We present these historic detections, as well as the first arcsecond-scale images obtained in this frequency band.

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