The Extragalactic Near Infrared Background

鲍恩，这项研究的目的是将新的观测技术应用到星系形成的问题上。宇宙形式中的星系和其他大型束缚系统是如何以及何时形成的，目前还不清楚。对原始星系的探测将是向前迈出的一大步。原始星系是在宇宙历史早期形成第一代恒星的星系，因此处于高红移。经过十多年的努力，至今还没有发现这样的物体。两项新技术将被用于研究原始星系。第一种是寻找来自许多原始星系的总和光，而不是单个物体。首席调查员将通过使用气球携带的冷却望远镜测量近红外波长的夜空亮度来实现这一目标。第二个是仔细研究可能的原始星系的局部类似物，这些星系附近的系统目前正在经历大规模的恒星形成爆发。PI将寻找恒星形成的特征特征或“标签”，然后可以用来识别更远距离的原始星系。无线电频率观测将对一系列红移较低的恒星形成系统以及红移为0.1-1.0的“蓝星系”进行观测，这些星系可能正处于局部恒星爆发星系和真正的原始星系之间的中间演化阶段。帕特里奇博士和鲍恩博士将与博洛尼亚大学的意大利科学家进行合作研究，作为他们研究的一部分。这项研究将涉及哈弗福德学院的本科生。

Boughn The objectives of this research are to bring new observational techniques to bear on the problem of galaxy formation. How and when galaxies and other large bound systems in the Universe form is not well understood. The detection of primeval galaxies, galaxies forming their first generation of stars early in the history of the Universe and hence at high redshift, would be a major step forward. No such objects have yet been found despite more than a decade of effort. Two new techniques will be used to investigate primeval galaxies. The first is to look for the summed light from many primeval galaxies rather than for individual objects. The Principal Investigators (PIs) will do so by measuring the brightness of the night sky at near infrared wavelengths using a balloon-borne, cooled telescope. The second is to make careful studies of possible local analogs of primeval galaxies, nearby systems which are currently undergoing massive bursts of star formation. The PIs will look for a characteristic feature or "tag" of star formation which could then be used to identify primeval galaxies at much greater distances. Radio frequency observations will be made of a range of star-forming systems at low redshifts, and also of the "blue galaxies" at redshifts 0.1-1.0, which may be at an intermediate stage of evolution between local starburst galaxies and true primeval galaxies. Drs. Partridge and Boughn will carry out collaborative research with Italian scientists from the University of Bologna as part of their research. The research will involve undergraduate students at Haverford College.