Collaborative Research: New Standard Stellar Population Models

合作研究：新的标准恒星种群模型

• 批准号: 0307407
• 负责人: Brian Chaboyer
• 金额: --
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307407&HistoricalAwards=false
• 关键词: Collaborative; Research; New; Standard; Stellar

Award: AST-0307407 PI: Brian ChaboyerInst: Dartmouth CollegeDr. Brian Chaboyer of Dartmouth College, with collaborators Guy Worthey of Washington State University (AST-0307487) and Edward Baron of University of Oklahoma (AST-0307323), will prepare a new set of stellar populations models that provide both isochrones and predicted colors and spectra for integrated populations. Their new models will incorporate the capability to model different abundance mixes, allowing, for the first time, variations in He/H, C, N, O, the alpha-elements, and an overall scaling factor for heavy element abundances. The models will include the most recent advances in model atmospheres, opacities, and stellar evolutionary codes. Using these models, they plan to demonstrate that absolute ages to 10% are achievable, and to derive ages for a sample of local galaxies. They will also derive a suite of elemental abundances for these galaxies, enabling strong new constraints on nucleosynthetic enrichment. These new models will impact almost every field of galactic and extragalactic astronomy, from studies of nearby stellar clusters and dwarf galaxies, to computing evolutionary corrections for high redshift galaxies. The PI's will make available, in both catalog form and through a web-based tool, the integrated and stellar photometry in all major filter systems, line strength indices, and both synthetic and empirically-derived spectra.

奖项：AST-0307407 PI：Brian Chaboyer研究机构：达特茅斯学院博士。达特茅斯学院的Brian Chaboyer与华盛顿州立大学的Guy Worthey（AST-0307487）和俄克拉荷马州大学的Edward Baron（AST-0307323）合作，将准备一套新的恒星种群模型，为综合种群提供等时线和预测的颜色和光谱。 他们的新模型将结合模拟不同丰度混合的能力，首次允许He/H，C，N，O，α元素的变化，以及重元素丰度的整体比例因子。 这些模型将包括模型大气、不透明度和恒星演化代码的最新进展。 利用这些模型，他们计划证明绝对年龄达到10%是可以实现的，并推导出局部星系样本的年龄。 他们还将为这些星系推导出一套元素丰度，从而对核合成富集产生强有力的新约束。 这些新模型将影响银河系和河外天文学的几乎每一个领域，从附近星团和矮星系的研究，到计算高红移星系的演化修正。 PI将以目录形式和通过基于网络的工具提供所有主要过滤系统的综合和恒星测光、线强度指数以及合成和光谱衍生光谱。