Collaborative Research: Star Formation, Feedback, and the ISM: Time-Resolved Constraints from a Large VLA Survey of Nearby Galaxies

合作研究：恒星形成、反馈和 ISM：来自附近星系大型 VLA 巡天的时间分辨约束

• 批准号: 0807515
• 负责人: Julianne Dalcanton
• 金额: $ 26.42万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807515&HistoricalAwards=false
• 关键词: Collaborative; Research; Star; Formation; Feedback

Drs Skillman and Dalcanton will map the neutral hydrogen gas in a variety of nearby galaxies with high resolution on the sky and in velocity, through a Large VLA Survey that is already under way. These galaxies were chosen from a set that Dalcanton has observed with the Hubble Space Telescope as part of a Treasury (large) proposal. The Hubble images can resolve individual blue stars in these galaxies, tracing the history of star formation through the past gigayear across the face of the galaxy. Maps of the distribution of neutral hydrogen and of the gas motions will be combined with that star formation history, and with infrared images from the Spitzer Space Telescope and ultraviolet images from GALEX. The investigators will trace how the star-forming history is related to local properties of the gas, and how starbirth has influenced the gas. To examine the expected relation between star formation and gas flow, the group will 'observe' hydrodynamic simulations carried out by collaborators at the University of Washington.The group will produce calibrated data cubes and moment maps (showing the gas surface density, its velocity field and the velocity dispersion) for the neutral hydrogen gas. These will be released to the community in 2011, after graduate students working on the project have finished their thesis work. Both of the PIs have strong records as undergraduate research mentors, and will involve undergraduate students in this research. The project will provide PhD dissertation material for at least two graduate students, one in Washington and one in Minnesota. The grant will support Dr. Skillman's Universe in the Park program, in which students take telescopes to State Parks during the summer months for public viewing, and make presentations on various aspects of astronomy.

Drs Skillman和Dalcanton将通过已经进行的大型VLA调查，将中性氢气绘制在各种附近的星系中，它们在天空和速度上高分辨率。 这些星系是从达尔坎顿（Dalcanton）在哈勃太空望远镜中观察到的一组的集合中选择的。 哈勃图像可以解决这些星系中的单个蓝色恒星，从而在过去的Gigayear上追溯了星系中的恒星形成的历史。 中性氢和气体运动分布的地图将与该恒星形成历史记录相结合，以及来自Spitzer空间望远镜的红外图像和来自Galex的紫外线图像。 研究人员将追踪形成恒星的历史与气体的局部特性有关，以及星野的影响如何影响气体。为了检查恒星形成与气体流量之间的预期关系，该组将“观察”华盛顿大学合作者进行的流体动力模拟。该小组将生成校准的数据立方体和力矩图（显示气体表面密度，其速度场和速度散布），用于中性氢气。 这些项目完成论文工作后，这些将于2011年将于2011年发布给社区。 这两个PI都有很强的记录作为本科研究导师，并将让本科生参与这项研究。 该项目将为至少两名研究生提供博士学位论文材料，其中一位在华盛顿，一项在明尼苏达州。 该赠款将支持Skillman博士在公园计划中的宇宙，在夏季，学生将望远镜带到州立公园进行公众观看，并就天文学的各个方面进行演讲。