CAREER: The First Stellar Abundances in Local Group Galaxies

事业：本星系群中的第一个恒星丰度

• 批准号: 9984073
• 负责人: Kimberley Venn
• 金额: $ 39.31万
• 依托单位: Macalester College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9984073&HistoricalAwards=false
• 关键词: CAREER; First; Stellar; Abundances; Local

AST-9984073 VENNA five-year research program to determine the chemical composition of a variety of Local Group galaxies from young stars will be carried out. In addition, there will be an educational initiative to bring the goals and results of this scientific project to the Macalester College community and the general public. The timing of this research project is excellent, since this is an exciting time for stellar spectroscopy as several 8- to 10-m telescopes are becoming available to astronomers. The use of these new telescopes will make the observations and analyses of stars in nearby galaxies a new possibility. The main goal of this project is to determine chemical abundances and critical abundance ratios in Local Group dwarf irregular and spiral galaxies. These new results, such as Oxygen/Iron (O/Fe) and Barium/Iron (Ba/Fe) abundance ratios, available only now from new stellar analyses, will constrain the star formation histories and galaxy evolution models of these Local Group galaxies. The results obtained may be applied more generally to our understanding of galaxy formation and evolution throughout the Universe. These known abundances of the elements in the stars themselves will also constrain massive star evolution models at very low metallicities, and the results will be applicable to population studies of high redshift galaxies. The goals and results of this scientific program will be used in a number of educational and outreach initiatives at Macalester College that will impact a variety of students and the general public. Firstly, the scientific program will generate approximately six to nine senior thesis projects by physics majors, and up to twelve independent research projects for non-physics majors. Secondly, a new seminar series for non-science majors will make it possible to introduce knowledge about the Local Universe. The information will be available to make it possible to expand on the goals, scientific methods used, and discuss results from the scientific project. Thirdly, this will provide new background information on the Universe for Macalester College science and mathematics majors. Fourthly, a colloquium series on astrophysics in the Local Universe will be geared towards the Macalester College community and general public. Expert astronomers will be invited to the College to deliver the public lectures and interact with students and faculty. In addition, both the seminar series and the colloquium series will be tied to the Macalester College program for public nights at the observatory, so thatparticipants can learn about a topic in a lecture and then actually observe related celestial objects for a more enriching experience. Finally, the data from the science program will be used to develop newexercises and laboratory demonstrations in both the introductory and advanced astronomy laboratory courses. The integration of scientific and educational programs is an excellent reflection of the mission of Macalester College.The Division of Astronomical Sciences provides support for this project.***

将开展AST-9984073维纳五年研究计划，以确定来自年轻恒星的各种局部群星系的化学成分。此外，还将有一项教育倡议，将这一科学项目的目标和成果带给Macalester学院社区和普通公众。这项研究项目的时机非常好，因为现在是恒星光谱学的一个令人兴奋的时期，因为天文学家可以使用几个8到10米的望远镜。这些新望远镜的使用将使观测和分析附近星系中的恒星成为一种新的可能性。该项目的主要目标是确定局部群矮化、不规则星系和螺旋星系的化学丰度和临界丰度比。这些新的结果，如氧/铁(O/Fe)和钡/铁(Ba/Fe)丰度比，现在才从新的恒星分析中获得，将约束这些局部群星系的恒星形成历史和星系演化模型。所获得的结果可能更广泛地应用于我们对整个宇宙中星系形成和演化的理解。这些已知的恒星元素丰度本身也将限制大质量恒星演化模型在非常低的金属丰度，结果将适用于高红移星系的人口研究。这一科学计划的目标和成果将用于Macalester学院的一些教育和外展活动，这些活动将影响到各种学生和普通公众。首先，该科学计划将产生大约6到9个物理专业的高级论文项目，以及最多12个非物理专业的独立研究项目。其次，为非理科专业学生开设的新系列研讨会将使我们有可能介绍有关局部宇宙的知识。这些信息将可以用来扩展目标、使用的科学方法，并讨论科学项目的结果。第三，这将为Macalester学院理科和数学专业的学生提供关于宇宙的新背景信息。第四，将为Macalester学院社区和普通公众举办一系列关于地方宇宙中的天体物理学的座谈会。专业天文学家将被邀请到学院发表公开演讲，并与学生和教职员工互动。此外，研讨会系列和座谈会系列都将与Macalester College在天文台的公共夜晚计划捆绑在一起，这样参与者可以在讲座中了解一个主题，然后实际观察相关的天体，以获得更丰富的体验。最后，来自科学计划的数据将用于在入门和高级天文学实验室课程中开发新的练习和实验室演示。科教项目的融合很好地体现了麦卡莱斯特学院的使命。天文科学部为这一项目提供支持。*