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arXiv 0910.0167astro-ph.IMastro-ph.CO
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3D光谱仪

3D Spectroscopic Instrumentation

Matthew A. Bershady

摘要:

在本章中,我们将回顾3D光谱学的挑战和机遇,以及这些挑战和机遇如何导致新的和不同的方法来采样天文信息。我们描述和分类现有的4米和10米望远镜的仪器。我们的主要重点是光栅色散光谱仪。我们讨论了如何优化色散元件,如VPH光栅,以实现足够的光谱分辨率,高吞吐量和有效的数据包装,以最大限度地提高空间采样的三维光谱。我们回顾和比较各种耦合方法,使这些光谱仪的“三维”,包括光纤,小透镜,切片,过滤多缝。我们还介绍了法布里-珀罗和空间外差干涉仪,指出其优势,相对于传统的,光栅色散光谱仪的领域拓宽系统。我们探索所有这些仪器样本的参数空间,突出政权开放供开发。目前的手段为未来的发展提供了一个陪衬。我们给出了一个概述,在今天的大型望远镜,在太空中,并在未来的超大型望远镜的时代,这样的未来仪器的计划。目前计划中的仪器开辟了新的领域,但也留下了重要的参数空间空白区域,召唤着进一步的发展。

英文摘要:

In this Chapter we review the challenges of, and opportunities for, 3D spectroscopy, and how these have lead to new and different approaches to sampling astronomical information. We describe and categorize existing instruments on 4m and 10m telescopes. Our primary focus is on grating-dispersed spectrographs. We discuss how to optimize dispersive elements, such as VPH gratings, to achieve adequate spectral resolution, high throughput, and efficient data packing to maximize spatial sampling for 3D spectroscopy. We review and compare the various coupling methods that make these spectrographs ``3D,'' including fibers, lenslets, slicers, and filtered multi-slits. We also describe Fabry-Perot and spatial-heterodyne interferometers, pointing out their advantages as field-widened systems relative to conventional, grating-dispersed spectrographs. We explore the parameter space all these instruments sample, highlighting regimes open for exploitation. Present instruments provide a foil for future development. We give an overview of plans for such future instruments on today's large telescopes, in space, and in the coming era of extremely large telescopes. Currently-planned instruments open new domains, but also leave significant areas of parameter space vacant, beckoning further development.

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。

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