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首页> 外文会议>Conference on EUV, x-ray, and gamma-ray instrumentation for astronomy >Differential field-widened spatial heterodyne spectrometer for investigations at high spectral resolution of the diffuse far-ultraviolet 1548-A emission line from the interstellar medium
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Differential field-widened spatial heterodyne spectrometer for investigations at high spectral resolution of the diffuse far-ultraviolet 1548-A emission line from the interstellar medium

机译：差分现场加宽的空间外差光谱仪，用于在漫射远紫外1548-从星际介质的发射线的高频分辨率进行研究

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In this paper we describe the design of the Spatial Heterodyne Spectrometer that we are developing for velocity-resolved observations of the diffuse interstellar C IV emission, and we describe a new implementation of the Spatial Heterodyne Spectroscopy (SHS) concept that reduces contamination due to grating scattering and unwanted orders in wide field applications. Laboratory tests of this concept at visible and ultraviolet wavelengths demonstrate that this SHS technique is suitable for the study of faint, diffuse emission lines at any wavelength, particularly in the ultraviolet, where the full advantages of interference spectroscopy have not been realized. Specifically, the development of SHS will provide the opportunity to map both the distribution and radial velocities of the hot (10$+5$/ K) component of the interstellar medium. An SHS spectrometer capable of obtaining the first velocity-resolved (20 km s$+$MIN@1$/) line profiles of the C IV $lambda@1548 emission line in the Cygnus loop and in the hot component of the interstellar medium at high Galactic latitude is currently being developed for suborbital observations. Our long term goal is the development of SHS for a radial-velocity-resolved sky survey of the 104+5$/ K `coronal gas' component of the interstellar medium using a small satellite with an approximately one year operational lifetime.
机译：在本文中，我们描述了我们正在开发的空间外差光谱仪的设计，用于弥漫性星际C IV发射的速度分辨观察，并且我们描述了空间外差光谱（SHS）概念的新实施，从而减少了光栅引起的污染宽野应用中的散射和不需要的订单。在可见和紫外波长下该概念的实验室测试表明，该SHS技术适用于在任何波长下的微弱漫射线的研究，特别是在紫外线中，其中尚未实现干扰光谱的充分优势。具体而言，SHS的发展将提供映射星际介质的热（10美元+ 5美元/ k）组分的分布和径向速度的机会。一种SHS光谱仪，能够在Cygnus环路中获得CIV $ Lambda @ 1548发射线的第一个速度分辨（20km S $ + $ min @ 1 $ /）线轮廓，以及在星际介质的热部件中目前正在开发高银河系的纬度用于亚血管学观察。我们的长期目标是使用小型卫星的径流介质的104 + 5美元/ k`冠状气体调查的径向速度解决的天空调查的SHS的发展。

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