Collaborative Research: A Large Stellar Library for Astronomical Research

合作研究：用于天文研究的大型恒星图书馆

• 批准号: 1715670
• 负责人: Jon Holtzman
• 金额: $ 7.63万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1715670&HistoricalAwards=false
• 关键词: Collaborative; Research; Large; Stellar; Library

Astronomers need to know the detailed colors of stars ("spectra") at visible and infrared wavelengths to conduct research about stars, galaxies, and the regions outside of galaxies in the Universe (for example, understanding different groups of stars in galaxies). The libraries of stellar spectra that we have today do not offer enough high-quality information to use for the studies of today's astronomers. For this project, the investigators will build a large library of high-quality spectra for about 6000 stars using observations made on existing telescopes and instruments. This project will serve the national interest as it promotes the progress of research in astronomy by providing high-quality standards for astronomers to use to do their research. The investigators will make and use a teaching unit with a web app for introductory college astronomy education that will help students understand how astronomers can learn about populations of stars using spectra. They will also train graduate students and run outreach activities.Stellar spectral libraries underpin spectroscopic analysis in stellar, galactic, and extragalactic astronomy; they are fundamental for modeling stellar populations in galaxies. Existing empirical stellar libraries have poor sampling in several important parts of the stellar parameter space, do not provide adequate wavelength coverage and spectral resolution for the state-of-the-art galaxy surveys, and often have poor flux calibration. Theoretical stellar libraries are not yet realistic enough to match the observed colors of stars and galaxies; this reveals an incomplete understanding of important stellar physics. To address these problems, the investigators will build a large, well-calibrated, high quality empirical stellar library of ~6000 stars with much more extensive coverage of stellar parameter space than previous efforts. The spectra will cover the wavelength range of 3600-10,300Å at a resolution of R~2000, with better than 3% relative flux calibration. It will be achieved by conducting parallel optical observations piggybacking on the APOGEE-2 survey as part of Sloan Digital Sky Survey-IV. The investigators will develop and then use an instructional unit with a web app for college introductory astronomy education that will help students understand how astronomers can learn about the stellar populations of a galaxy from its spectrum. The investigators will also train graduate students and conduct outreach activities.

天文学家需要知道恒星在可见光和红外波长下的详细颜色（“光谱”），以进行有关恒星、星系和宇宙中星系外区域的研究（例如，了解星系中不同的恒星群）。 我们今天拥有的恒星光谱库并不能提供足够的高质量信息来供今天的天文学家研究。 在这个项目中，研究人员将利用现有望远镜和仪器的观测结果，为大约6000颗恒星建立一个大型的高质量光谱库。 该项目将为国家利益服务，因为它通过为天文学家提供高质量的标准来促进天文学研究的进展。 研究人员将制作并使用一个带有网络应用程序的教学单元，用于大学天文学入门教育，这将帮助学生了解天文学家如何利用光谱了解恒星群。 恒星光谱库是恒星、银河系和河外天文学光谱分析的基础，也是模拟星系中恒星数量的基础。 现有的经验恒星库在恒星参数空间的几个重要部分的采样差，不提供足够的波长覆盖范围和光谱分辨率的国家的最先进的星系调查，往往有穷人的流量校准。 理论上的恒星库还不足以与观测到的恒星和星系的颜色相匹配;这表明对重要恒星物理学的理解还不完整。 为了解决这些问题，研究人员将建立一个大型的，校准良好的，高质量的经验恒星库，其中包含约6000颗恒星，比以前的努力更广泛地覆盖恒星参数空间。 光谱将覆盖3600- 10，300 nm的波长范围，分辨率为R~2000，相对通量校准优于3%。 这将通过在作为斯隆数字巡天四的一部分的APOGEE-2巡天的基础上进行平行光学观测来实现。 研究人员将开发并使用带有网络应用程序的教学单元进行大学天文学入门教育，这将帮助学生了解天文学家如何从星系光谱中了解星系的恒星群。 调查人员还将培训研究生并开展外联活动。

项目成果

SDSS-IV MaStar: A Large and Comprehensive Empirical Stellar Spectral Library—First Release

• DOI: 10.3847/1538-4357/ab3ebc
• 发表时间: 2018-12
• 期刊: The Astrophysical Journal
• 作者: R. Yan;Yanping Chen;D. Lazarz;D. Bizyaev;C. Maraston;G. Stringfellow;Kyle McCarthy;S. Meneses-Goytia-S.-M

The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA-derived Quantities, Data Visualization Tools, and Stellar Library

• DOI: 10.3847/1538-4365/aaf651
• 发表时间: 2018-12
• 期刊: The Astrophysical Journal Supplement Series
• 作者: D. Aguado;Romina Ahumada;Andr'es Almeida;S. Anderson;B. Andrews;B. Anguiano;E. Ort́ız;A. Aragón-Sa

APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South

• DOI: 10.3847/1538-3881/aba592
• 发表时间: 2020-07
• 期刊: The Astronomical Journal
• 作者: H. Jönsson;J. Holtzman;C. Prieto;K. Cunha;D. A. Garc'ia-Hern'andez;S. Hasselquist;T. Masseron;Y. Osorio;M. Shetrone;V. Smith;G. Stringfellow;D. Bizyaev;B. Edvardsson;S. Majewski;S. M'esz'aros;D. Souto;O. Zamora;R. Beaton;J. Bovy;J. Donor;M. Pinsonneault;Vijith Jacob Poovelil;J. Sobeck

SDSS-IV MaStar: theoretical atmospheric parameters for the MaNGA stellar library

SDSS-IV MaStar：MaNGA 恒星库的理论大气参数

• DOI: 10.1093/mnras/stab3263
• 发表时间: 2021
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Hill, Lewis;Thomas, Daniel;Maraston, Claudia;Yan, Renbin;Neumann, Justus;Lundgren, Andrew;Lazarz, Daniel;Chen, Yan-Ping;Cappellari, Michele;Holtzman, Jon A.
• 通讯作者: Holtzman, Jon A.

SDSS-IV MaStar: Data-driven Parameter Derivation for the MaStar Stellar Library

• DOI: 10.3847/1538-3881/ac3ca7
• 发表时间: 2021-12
• 期刊: The Astronomical Journal
• 作者: J. Imig;J. Holtzman;R. Yan;D. Lazarz;Yanping Chen;L. Hill;D. Thomas;C. Maraston;M. Prescott;G. Stringfellow;D. Bizyaev;R. Beaton;N. Drory