RUI: Star Formation Rate and Extinction in Galaxies, Near and Far

RUI：近处和远处星系中的恒星形成率和灭绝

• 批准号: 0909240
• 负责人: Marianne Takamiya
• 金额: $ 13.91万
• 依托单位: University of Hawaii at Hilo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909240&HistoricalAwards=false
• 关键词: RUI; Star; Formation; Rate; Extinction

Dr. Takamiya will use the University of Hawaii's 2.2-meter telescope, and the new 0.9-meter telescope dedicated to UH-Hilo, to take images of 30 nearby galaxies in the light of hydrogen gas that has been heated by nearby young stars. Young stars are generally surrounded by dusty gas, out of which they have formed. The dust absorbs some of the light from the hot gas, blocking blue light more strongly than red. Dr Takamiya will compare images of her galaxies in both the red line of H-alpha and the green line of H-beta, to estimate how strong the blocking effect is. A further check will come from maps in the mid-infrared made from space observations, and maps at radio wavelengths, since these are almost unaffected by dust. The results obtained in nearby galaxies will be extrapolated to distant disk galaxies, where in general only lines such as H-alpha at optical wavelengths can be measured easily for large samples. This extrapolation will yield better estimates of the rate at which galaxies have formed their stars throughout cosmic history.This project will provide research opportunities to undergraduate students at Dr. Takamiya's institution. Six undergraduate students will be hired to participate in writing observing proposals to gain access to telescopes on Mauna Kea, to carry out the observations, reduce and analyze them, and to present the results in professional meetings. The University of Hawaii at Hilo is located in the most ethnically diverse county in the USA, and members of under-represented groups will be encouraged to participate in this research. Dr Takamiya will also continue her outreach work to local elementary schools.

Takamiya博士将使用夏威夷大学的2.2米望远镜，以及专用于UH-Hilo的新型0.9米望远镜，以附近年轻恒星加热的氢气，拍摄附近30个星系的图像。 年轻的恒星通常被尘土飞扬的气体包围，它们已经形成了。 灰尘吸收了热气中的一些光，比红色更强烈地阻塞蓝光。 Takamiya博士将比较H-Alpha的红线和H-Beta的绿线中的星系图像，以估计阻塞效应的强度。 从空间观测结果和无线电波长的地图制成的中红外的地图中，将进一步检查，因为它们几乎不受灰尘的影响。 在附近星系中获得的结果将被外推到遥远的磁盘星系，其中通常只能为大型样品轻松测量光波长下的H-alpha等线。 这种外推将更好地估计星系在整个宇宙历史上形成星系的速度。该项目将为Takamiya博士机构的本科生提供研究机会。 将聘请六名本科生参加撰写观察提案，以获取有关Mauna Kea的望远镜，以进行观察，减少和分析它们，并在专业会议中介绍结果。希洛大学夏威夷大学位于美国最多样化的县，将鼓励代表性不足的团体的成员参加这项研究。 Takamiya博士还将继续向当地小学进行外展工作。