Dome Fuji in Antarctica as a Site for Infrared and Terahertz Astronomy
Dome Fuji in Antarctica as a Site for Infrared and Terahertz Astronomy
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DOI：
10.1017/s1743921312016961
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
M. Seta;N. Nakai;S. Ishii;M. Nagai;Y. Miyamoto;T. Ichikawa;N. Takato;H. Motoyama
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文献类型：
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作者：
M. Seta;N. Nakai;S. Ishii;M. Nagai;Y. Miyamoto;T. Ichikawa;N. Takato;H. Motoyama
摘要南极高原富士圆顶的海拔3810米，平均气温- 54℃，是进行太赫兹天文观测的理想地点。我们已经证明了富士山在夏季220 GHz的不透明度非常好和稳定；τ = 0.045±0.007。从2014年开始，我们开发了一种可移动的30厘米望远镜，用于在圆顶富士的CO （J= 4-3）和[CI] （3P1-3P0）线上绘制银河系。它有一个9英尺长的横梁。通过直接比较CO （J= 4-3）和[CI] （3P1-3P0）与CO (J= 1-0)，可以得出分子云的密度和温度等物理条件。我们也在开发一个1.2米的亚毫米望远镜。它将配备一个500/800 GHz的双超导装置（SIS）接收器。1.2米的望远镜在492ghz的频率上产生2.2英尺的光束，可以绘制出分子云的全图。它还可以观测到CO （J= 4-3）、CO （J= 7-6）、[CI] （3P1-3P0）、[CI] （3P2-3P1）和460-810 GHz连续发射的邻近星系。
Abstract Dome Fuji on the Antarctic high plateau may be a good site for terahertz astronomy because of its high altitude of 3,810 m and low average temperature of −54°C. We have demonstrated that the opacity at 220 GHz from Dome Fuji in summer is very good and stable; τ = 0.045 ± 0.007. We have developed a transportable 30 cm telescope to map the Milky Way in the CO (J=4–3) and the [CI] (3P1–3P0) lines at Dome Fuji from 2014. It has a 9′ beam. Physical conditions such as density and temperature of molecular clouds could be derived from a direct comparison of CO (J=4–3) and [CI] (3P1–3P0) with CO (J=1–0) taken by the Columbia–CfA survey. We are also developing a 1.2 m sub-millimeter telescope. It will be equipped with a dual superconducting device (SIS) receiver for 500/800 GHz. The 1.2 m telescope produces a 2.2′ beam at 492 GHz and could map a molecular cloud entirely. It could also observe nearby galaxies in the CO (J=4–3), CO (J=7–6), [CI] (3P1–3P0), [CI] (3P2–3P1) and in continuum emission between 460–810 GHz.