An Automated Fiber High Resolution Spectrograph for a Small Telescope

用于小型望远镜的自动光纤高分辨率光谱仪

• 批准号: 0519429
• 负责人: Catherine Pilachowski
• 金额: $ 29.61万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0519429&HistoricalAwards=false
• 关键词: Automated; Fiber; Resolution; Spectrograph; Small

Proposal: 0519429 Principal Investigator: Catherine Pilachowski Title: An Automated Fiber High Resolution Spectrograph for a Small Telescope ABSTRACT: An automated fiber high resolution echelle spectrograph (the FHiREbot spectrograph) will be built by Indiana University (IU) for use in unattended mode on IU's SpectraBot 1.3-m telescope. The spectrograph incorporates a 76 degree echelle grating with a white pupil design to achieve a spectral resolving power of R=60,000, sufficient to resolve thermal line profiles in solar-type stars, with simultaneous and complete spectral coverage from 390-680 nm, covering the Ca II K and H lines through the Li I feature at 670 nm. The format of the spectrograph will be fixed so that the spectra will be standardized and uniform. All spectra obtained will ultimately be processed through pipeline reductions and made available to the community in a spectral library. Intellectual Merit: The primary reason to build this spectrograph is the need to conduct large surveys of relatively bright stars, both to obtain statistically significant or complete samples of stellar types and to enable efficient monitoring programs for stellar variability and asteroseismology. The specific scientific goal proposed is a complete survey of the 10,000 Hipparcos stars which are visible from the northern hemisphere and which have high-quality (better than 10%) parallax and proper motion data. These data will be used for studies of stellar properties and evolution, including detailed studies of stellar abundances throughout the HR diagram, studies of the evolution of angular momentum in stars, and studies of the changes of the Li abundance in stars with stellar evolution. Broader Impacts: The FHiREbot spectrograph will significantly impact the broader community on two fronts: education and research infrastructure. Graduate students and undergraduate astronomy majors at IU will participate in the design and commissioning of the spectrograph; experience with instrumentation is an important component in undergraduate education. Undergraduates will use data from the spectrograph for Senior Honors theses, and graduate students will use FHiREbot for Ph.D. thesis research. More broadly, the archive of standardized spectra will be a resource for small undergraduate research projects carried out as part of our core undergraduate courses. Access to the database will not be restricted to IU, and curricular units on basic spectrum analysis developed for IU courses will be available to educators elsewhere for classroom use. The impact on research infrastructure in astronomy is potentially large. US astronomers currently have limited access to high dispersion spectrographs, except on the largest telescopes where only limited time is available. Broad spectroscopic surveys are best carried out on moderate aperture telescopes (small telescopes do not collect enough light, and big telescopes cannot access large samples efficiently). The availability of FHiREbot on IU's automated SpectraBot telescope will provide an important piece of instrumentation infrastructure for US astronomers. The FHiREbot database of spectra will also be available to the community for use in scientific investigations.

摘要：美国印第安纳大学（IU）将建造一个自动化光纤高分辨率梯级光谱仪（FHiREbot光谱仪），用于在无人值机模式下使用印第安纳大学的SpectraBot 1.3 m望远镜。该光谱仪采用了76度阶梯光栅和白色瞳孔设计，光谱分辨能力为R=60,000，足以分辨太阳型恒星的热谱线轮廓，同时具有390-680 nm的完整光谱覆盖，覆盖了Ca II K和H线，通过670 nm的Li I特征。摄谱仪的格式将是固定的，这样光谱将是标准化和统一的。所有获得的光谱最终将通过管道还原处理，并在光谱库中提供给社区。智力价值：建造这台摄谱仪的主要原因是需要对相对明亮的恒星进行大规模调查，既可以获得具有统计意义的或完整的恒星类型样本，又可以有效地监测恒星变动性和星震学。提出的具体科学目标是对从北半球可见的一万颗希巴谷恒星进行全面调查，这些恒星具有高质量（优于10%）的视差和适当的运动数据。这些数据将用于研究恒星的性质和演化，包括详细研究整个HR图中的恒星丰度，研究恒星角动量的演化，以及研究恒星中Li丰度随恒星演化的变化。更广泛的影响：FHiREbot光谱仪将在两个方面对更广泛的社区产生重大影响：教育和研究基础设施。研究生和本科天文专业学生将参与光谱仪的设计和调试；仪器使用经验是本科教育的重要组成部分。本科生将使用光谱仪的数据进行高级荣誉论文，研究生将使用FHiREbot进行博士论文研究。更广泛地说，标准化光谱档案将成为小型本科生研究项目的资源，作为我们核心本科课程的一部分。数据库的访问将不限于国际大学，并且为国际大学课程开发的基本频谱分析课程单元将可供其他地方的教育工作者在课堂上使用。这对天文学研究基础设施的潜在影响是巨大的。美国天文学家目前使用高色散光谱仪的机会有限，除了在最大的望远镜上，时间有限。广谱巡天最好在中等口径的望远镜上进行（小望远镜不能收集足够的光，大望远镜不能有效地获取大样本）。在印第安纳大学的自动SpectraBot望远镜上使用FHiREbot将为美国天文学家提供重要的仪器基础设施。FHiREbot光谱数据库也将提供给社区用于科学调查。