The Local Degenerate Star Population: Calibrating a Vast New Domain

局部退化恒星群：校准广阔的新领域

• 批准号: 0507797
• 负责人: Jay Holberg
• 金额: --
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507797&HistoricalAwards=false
• 关键词: Local; Degenerate; Star; Population; Calibrating

AST 0507797Jay HolbergUniversity of ArizonaThe Local Degenerate Star Population: Calibrating a Vast New DomainABSTRACTA program to comprehensively study the local white dwarf population will be undertaken to address fundamental questions concerning the Galactic origin (thin disk, thick disk or halo) of both individual white dwarfs as well as the spectroscopic subpopulations of these stars. This study will also provide important details on the thermal and chemical evolution of white dwarfs and link the local white dwarf population with larger more distant samples such as the white dwarf population in the Sloan Digital Sky Survey. The population for this study is the 2000 to 2500 white dwarfs listed in the Villanova Catalog of Spectroscopically Identified White Dwarfs. These goals are achieved through the use of newly available photometric, spectroscopic and proper motion data to augment existing data on this population of predominantly local white dwarfs. A fundamental aspect of this proposal is the maintenance and upgrading of the existing Villanova Catalog of Spectroscopically Identified White Dwarfs and the (Arizona) White Dwarf Database, in which all these data sets will reside. Finally, a modest observing program will be conducted to deepen and expand the existing spectroscopic and photometric data for known white dwarfs that will fill key gaps as well as validate the classifications for all stars in the catalog and database.The database contents (both observed and parameters derived through this work) will be made publicly available via the internet and used by astronomers across several disciplines (Galactic structure, formation, compact object physics, etc.). Multiple undergraduate students will be involved with aspects of the work at both Arizona and Florida Tech. They will participate in the design of the database, its population, and analysis and will have the opportunity to experience scientific research with large data sets.

AST 0507797Jay HolbergUniversity of ArizonaThe Local Degenerate Star Population: Calibrating a Vast New DomainABSTRACTA program to comprehensively study the local white dwarf population will be undertaken to address fundamental questions concerning the Galactic origin (thin disk, thick disk or halo) of both individual white dwarfs as well as the spectroscopic subpopulations of these stars.这项研究还将提供有关白色矮人的热和化学演化的重要细节，并将当地的白矮人种群与较大的远处样本（如斯隆数字天空调查中的白矮人种群）联系起来。这项研究的人口是在光谱镜识别的白矮人的Villanova目录中列出的2000至2500个白矮人。这些目标是通过使用新可用的光度法，光谱和正确运动数据来实现的，以增强主要是当地白矮人的现有数据。该提案的一个基本方面是维护和升级现有的Villanova目录的光谱镜识别为白矮人和（亚利桑那州）白矮人数据库，其中所有这些数据集将居住在其中。最后，将进行一项适度的观察程序，以加深和扩展已知的白矮人的现有光谱和光度数据数据，这些数据将填补关键空白，并验证目录和数据库中所有星星的分类。物理等）。多名本科生将参与亚利桑那州和佛罗里达理工大学的工作方面。他们将参与数据库，其人口和分析的设计，并有机会通过大型数据集体验科学研究。