MOHSIS: The Maryland OH Suppression IFU System for the Discovery Channel Telescope

MOHSIS：用于探索频道望远镜的马里兰州 OH 抑制 IFU 系统

• 批准号: 1207785
• 负责人: Sylvain Veilleux
• 金额: $ 84.59万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207785&HistoricalAwards=false
• 关键词: MOHSIS; Maryland; OH; Suppression; IFU

A long-standing and profound problem in astronomy is the difficulty in obtaining deepnear-infrared observations from the ground due to the extreme brightness and variability of the night sky at these wavelengths. The atmospheric emission at 1.0 - 1.7 um arises almost entirely from a forest of extremely bright, very narrow OH emission lines that vary on timescales of minutes. Using an approach known as a fiber Bragg grating (FBG), these emission lines can now be selectively removed, while retaining high throughput between the lines.Dr. S. Veilleux of the University of Maryland College Park and his international team have carefully refined the application of this technique by incorporating an Integral Field Unit (IFU) FBG input, and have thoroughly demonstrated the efficacy of the approach through in situ tests with existing telescopes and instrumentation. The requested NSF funds are highly leveraged through FBG development at the University of Sydney and spectrograph construction being provided by the NASA Goddard Space Flight Center as well as the University of Maryland. Science applications will initially focus on low-resolution spectroscopy of very faint, transient gamma-ray burst (GRB) sources, which are now known to originate in supernovae located in very distant galaxies, as well as on studies of the galaxies that host these cataclysms. Teaming with Discovery Communications provides an unusual outreach component to the project that will involve students at a variety of levels as well as the general public.Funding this component of the near-infrared OH emission-line suppression spectrograph is being provided by NSF's Division of Astronomical Sciences through its Advanced Technologies and Instrumentation program.

天文学中一个长期存在且意义深远的问题是，由于夜空在这些波长处的极端亮度和可变性，很难从地面获得深近红外观测。在1.0 - 1.7微米的大气发射几乎完全来自一个非常明亮，非常窄的OH发射线的森林，在分钟的时间尺度上变化。使用一种被称为光纤布拉格光栅（FBG）的方法，这些发射线现在可以被选择性地去除，同时保持线之间的高吞吐量。马里兰州大学帕克分校的Veilleux和他的国际团队通过引入积分场单元（IFU）FBG输入来仔细改进这种技术的应用，并通过使用现有望远镜和仪器的现场测试彻底证明了这种方法的有效性。 要求的NSF资金通过悉尼大学的FBG开发和NASA戈达德太空飞行中心以及马里兰州大学提供的光谱仪建设得到高度利用。 科学应用最初将侧重于非常微弱的瞬态伽马射线暴（GRB）源的低分辨率光谱学，现在已知这些源起源于位于非常遥远的星系中的超新星，以及对这些灾难所在星系的研究。 与Discovery Communications的合作为该项目提供了一个不同寻常的外展组成部分，该项目将涉及各种级别的学生以及普通公众。近红外OH发射线抑制光谱仪的这一组成部分由NSF的天文科学部通过其先进技术和仪器计划提供资金。