RUI: New Observations of Intragroup Starlight

RUI：群内星光的新观察

• 批准号: 0807873
• 负责人: John Feldmeier
• 金额: $ 14.76万
• 依托单位: Youngstown State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807873&HistoricalAwards=false
• 关键词: RUI; New; Observations; Intragroup; Starlight

Dr. Feldmeier will search for diffuse light between the galaxies within several galaxy groups. This light is probably that of stars torn from the galaxies as their orbits within the group bring them close to one another. Very deep images will be obtained with the Burrell Schmidt, a 0.6-meter telescope that has been specially adapted for deep exposures covering 1.5 degrees across on the sky, or 3 times the diameter of the full moon. Images in a narrow bandpass that picks out the green light of the OIII line will be used to find planetary nebulae. These objects represent the final stage in the life of a sunlike star, as it blows off its outer layers; the ejected gas is ionized by the star's hot core, and shines brightly in the OIII line. The team will then take spectra with larger telescopes to confirm that objects that appear bright at the wavelength of the survey bandpass really are planetary nebulae, to find their radial velocities, and to explore the other chemical elements present in the gas. In preparation for surveys with new large imagers such as the One-Degree Imager (ODI) that is now being built for the 3.5-meter WIYN telescope, Dr Feldmeier will use smaller telescopes to calibrate dense fields of standard stars in one-degree patches in different areas of the sky. With these it will be possible to calibrate ODI 'in one shot' rather than taking many images to place a single standard star successively on the 64 independent elements of the imager. Dr. Feldmeier's institution, Youngstown State University, is an undergraduate institution; he will involve undergraduate students in both astronomical and technical aspects of the research. The standard-star data for the one-degree calibration fields will be released to the community, to be used in other large-field imaging projects. Youngstown State University has a 145-seater planetarium, with software allowing users to design and render their own shows. The PI will produce all-dome videos to illustrate diffuse light between the galaxies in galaxy groups and clusters, and will release those to other planetaria.

Feldmeier博士将在几个星系群中寻找星系之间的漫射光。 这种光可能是恒星从星系中撕裂出来的光，因为它们在星系群中的轨道使它们彼此靠近。 非常深的图像将获得与伯勒尔施密特，一个0.6米的望远镜，已专门适用于深曝光覆盖1.5度的天空，或3倍的满月直径。在一个窄带中的图像，挑选出OIII线的绿色光，将被用来寻找行星状星云。 这些天体代表了类太阳星星生命的最后阶段，当它吹离外层时;喷出的气体被星星的热核心电离，并在OIII线中明亮地发光。 然后，研究小组将用更大的望远镜拍摄光谱，以确认在巡天波段出现的明亮物体确实是行星状星云，以找到它们的径向速度，并探索气体中存在的其他化学元素。 为了准备使用新的大型成像仪进行调查，例如现在正在为3.5米WIYN望远镜建造的一度成像仪（ODI），Feldmeier博士将使用较小的望远镜来校准天空不同区域中标准恒星的密集场。 有了这些，就有可能“一次”校准ODI，而不是拍摄许多图像，将单个标准星星连续放置在成像仪的64个独立元件上。 Feldmeier博士所在的扬斯敦州立大学是一所本科院校;他将让本科生参与天文学和技术方面的研究。 一度校准场的标准星数据将向社会公布，用于其他大视场成像项目。 扬斯敦州立大学有一个145个座位的天文馆，软件允许用户设计和渲染自己的节目。 PI将制作全穹顶视频，以说明星系群和星系团中星系之间的漫射光，并将这些视频发布到其他行星。