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

Takamiya博士将使用夏威夷大学的2.2米望远镜和专门用于UH-Hilo的新的0.9米望远镜，在被附近年轻恒星加热的氢气光下拍摄附近30个星系的图像。 年轻的恒星通常被尘埃气体包围，它们是由尘埃气体形成的。 尘埃从热气体中吸收了一些光，阻挡蓝光的能力比阻挡红光的能力更强。 Takamiya博士将比较她的星系在H-α的红线和H-β的绿色线上的图像，以估计阻挡效应有多强。 进一步的检查将来自空间观测中的中红外线地图，以及无线电波长的地图，因为这些几乎不受尘埃的影响。 在附近星系中获得的结果将外推到遥远的盘星系，在那里，一般只有像H-α这样的光波长的线才能很容易地测量到大样本。 这一外推法将对整个宇宙历史中星系形成恒星的速度产生更好的估计。这一项目将为高宫博士所在机构的本科生提供研究机会。 将聘请六名本科生参与编写观测建议，以获得莫纳克亚山上的望远镜，进行观测，减少和分析它们，并在专业会议上提出结果。位于希洛的夏威夷大学位于美国种族最多样化的县，将鼓励代表性不足的群体成员参与这项研究。 Takamiya博士还将继续她在当地小学的推广工作。

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.