POWRE: A Comprehensive Library of Observational Near-Infrared Stellar Spectra

POWRE：观测近红外恒星光谱的综合图书馆

• 批准号: 9973812
• 负责人: Pamela Marcum
• 金额: $ 3.09万
• 依托单位: Texas Christian University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9973812&HistoricalAwards=false
• 关键词: POWRE; Comprehensive; Library; Observational; Near

Abstract - Marcum AST 9973812The main aim of this project is the construction of an observational, near-infrared wavelength (0.9-1.8 microns) stellar spectral library of moderate (~1-5 Angstroms) resolution. This spectral library will be used for exploratory investigations in combining these data with existing optical data, for possible future applications in stellar population studies of galaxies. The project has a well-defined goal and thus will produce a tangible "end product" (e.g., the spectral atlas) which has potential for use in crossdisciplinary applications, such as comparison of theoretical stellar model atmospheres and the identification of currently unknown near-infrared (near-IR) opacity sources in cool stellar atmospheres.An advantage of this project is that the feasibility of obtaining high-quality near-IR spectra for a large number (~200) of stars has already been demonstrated. However, as this is one of the first attempts to produce "template" spectra characterizing the "average" near IR features in a particular stellar type, the project will involve the creation of innovative techniques to accomplish this necessary task. While this is common practice for optical spectra, problems in "averaging" a set of spectra to produce a "template" near-IR spectrum are related to the large number of absorption features in that part of the spectrum, and the lack of a true "continuum in cool stars which could be used to normalize the spectra. It is further anticipated that techniques will have to be developed to "splice" the near-IR data with existing optical data, since no standardized method of accomplishing this task exists. The fact is that some of the necessary data already exists. This means that undergraduate student assistants can begin learning how to reduce the data immediately (software has already been created to facilitate data reductions). The development of solutions to these potential problems can begin even before any additional data is collected.This award is supported by funds from the Division of Astronomical Sciences and the Office of Multidisciplinary Activities in the Directorate of Mathematical and Physical Sciences.

摘要- Marcum AST 9973812该项目的主要目的是建立一个中等分辨率（~1-5埃）的观测性近红外波长（0. 9 - 1. 8微米）恒星光谱库。 该光谱库将用于探索性研究，将这些数据与现有的光学数据相结合，以便将来可能应用于星系的恒星种群研究。 项目有一个明确的目标，因此将产生一个有形的“最终产品”（例如，光谱图集），该项目具有跨学科应用的潜力，例如比较理论恒星模型大气和识别冷恒星大气中目前未知的近红外（近红外）不透明度源。该项目的一个优点是，已经证明了获得大量（约200）恒星的高质量近红外光谱的可行性。然而，由于这是首次尝试产生表征特定恒星类型中“平均”近红外特征的“模板”光谱之一，该项目将涉及创造创新技术来完成这一必要任务。 虽然这是光学光谱的常见做法，但“平均”一组光谱以产生“模板”近红外光谱的问题与该部分光谱中大量的吸收特征有关，并且在冷恒星中缺乏真正的“连续谱”，可以用来归一化光谱。进一步预计，将必须开发技术来“拼接”近红外数据与现有的光学数据，因为没有标准化的方法来完成这项任务。 事实上，一些必要的数据已经存在。 这意味着本科学生助理可以开始学习如何立即减少数据（软件已经创建，以促进数据减少）。 这些潜在问题的解决方案的发展甚至可以开始之前收集任何额外的数据。这个奖项是由天文科学处和多学科活动办公室在数学和物理科学局的资金支持。