RUI: New Observations of Intragroup Starlight

费尔德梅尔博士将在几个星系群中寻找星系之间的漫射光。这种光很可能是恒星从星系中撕裂出来的，因为它们在星系群内的轨道使它们彼此靠近。非常深的图像将由伯勒尔·施密特望远镜获得，这是一架0.6米的望远镜，专门用于深度曝光，覆盖1.5度的天空，或满月直径的3倍。窄带通的图像可以分辨出OIII线的绿光，这将被用来寻找行星状星云。这些天体代表了类太阳恒星生命的最后阶段，因为它吹掉了它的外层；喷出的气体被恒星炽热的核心电离，并在OIII线上发出明亮的光芒。然后，研究小组将用更大的望远镜拍摄光谱，以确认在巡天带通的波长上看起来很亮的物体确实是行星状星云，并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巡天，比如目前正在为3.5米的WIYN望远镜建造的一度成像仪（ODI），费尔德迈尔博士将使用较小的望远镜来校准天空中不同区域的标准恒星在一度斑块上的密集区域。有了这些，就有可能“一次拍摄”校准ODI，而不是拍摄许多图像，在成像仪的64个独立元件上连续放置单个标准恒星。费尔德迈尔所在的扬斯敦州立大学（Youngstown State University）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。一度定标场的标准星数据将向社会公开，供其他大视场成像项目使用。扬斯敦州立大学（Youngstown State University）有一个145个座位的天文馆，其软件允许用户设计和渲染自己的表演。PI将制作全穹顶视频来说明星系团和星系团中星系之间的漫射光，并将这些视频发布给其他行星。

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.