Cosmic Evolution through Stellar Spectroscopy

通过恒星光谱观察宇宙演化

• 批准号: RGPIN-2014-06054
• 负责人: Venn, Kimberley
• 金额: $ 2.62万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633400
• 关键词: Cosmic; Evolution; through; Stellar; Spectroscopy

My research is centered on the chemical evolution of stellar systems via spectroscopic abundance analyses. A major aim of this is to understand the evolution and enrichment of galaxies from the earliest epochs, as well as improving our understanding of the origins of the elements. This proposal describes several related avenues of such work, in our own and in nearby dwarf galaxies. Detailed spectroscopy of specific targets (metal-poor stars, chemically peculiar stars, stars beyond the tidal radii in dwarf galaxies) can address questions of the origins of the elements and the homogeneity of the interstellar medium, as well as the effects of stellar winds and supernova feedback on galaxy evolution, and the impact of mergers on the chemical evolution of low mass systems. This field has had a significant impact in the past decade, and yet we are only beginning to have sufficient data to compare the nearby dwarf galaxies to one another, and to collect data for the more isolated dwarf irregular galaxies. The Galactic Centre is another interesting region where metal-poor stars have yet to be found in significant numbers, and yet numerical simulations suggest that First Stars ignite as metal-free, massive stars near the gravitational centres of massive halos. We have initiated a program to search for metal-poor stars in the Galactic Bulge using both photometry and spectroscopic techniques – one of these will include first light use of the Subaru-RAVEN multi-object adaptive optics prototype. The next decade will see an increase in large spectroscopic surveys, and while many are being planned, such as Subaru-PFS and NOAO-DESI, some high resolution studies are currently being executed, such as SDSS III-APOGEE and the ESO-GAIA survey. Through public releases, these datasets (and others such as from Herschel and ALMA) can be used to address questions ranging from Galactic Archaeology to the formation of debris disks. My research proposal includes several projects that are ideal for HQP training of students and PDFs.

我的研究以光谱丰度分析为中心，并富含高峰期的星系，并改善了我们对元素起源的理解。化学奇特的恒星，矮星系中的潮汐半径以外的恒星可以增加元素的起源，而在低质量系统的化学演化中，星际培养基的同质性在过去十年中产生了重大影响。我们开始有足够的能力将附近的矮星系与彼此的常规星系进行比较。 e在巨大的重力中心附近的巨大恒星已使用光度法和光谱技术启动了一项金属贫困恒星的程序 - 其中包括subaru-objection Adpottive Adpottive Optics的使用，尽管正在计划许多人，但目前正在执行Subaru-PF和NOAO-DESI分辨率研究，例如来自Herschel和Alma）来添加添加到从银河考古学到碎片磁盘的形成范围的添加范围。