The Ohio State Infrared Imaging System: A Survey of Galaxies and Regions of Star Formation

将构建1 - 2.5微米波长成像系统， 开展两大研究项目：形态学研究 和恒星含量的星系和测定 在具有α的星星形成区中恒星初始质量函数 广泛的物理特性。 仪器将 基于Rockwell 256 x 256 HgCdTe阵列， 俄亥俄州/洛厄尔天文台1.8米望远镜在弗拉格斯塔夫， 亚利桑那 每像素1.6角秒的底片比例尺和 240的分辨能力将使仪器具有两个独特的 特点：7弧分大视场组合 具有高量子效率（QE）和相等的狭缝长度， 用于低分辨率光谱的尺寸。 这些特点 结合长的观察时间块的可用性， 将允许俄亥俄州的研究人员进行大规模的 调查项目的敏感度，否则 不可能的 两大事业之首将是编纂 正常星系的多色近红外（IR）图集， 所有类型。 近红外线，它密切跟踪质量 分布，预计将揭示不可见的结构 光学上。 对乌云和星星区域的研究 形成代表了第一次完整的调查， 云量的范围将得到并将建立，因为 例如，恒星初始质量函数如何随 环境

A 1-2.5 micron wavelength imaging system will be constructed to carry out two major research programs: a study of the morphology and stellar content of galaxies and a determination of the stellar initial mass function in regions of star formation with a wide range of physical characteristics. The instrument will be based on a Rockwell 256 x 256 HgCdTe array and be used on the Ohio State/Lowell Observatory 1.8-m telescope in Flagstaff, Arizona. A plate scale of 1.6 arcsec per pixel and a grism with a resolving power of 240 will give the instrument two unique characteristics: a large - 7 arcmin - field of view combined with high quantum efficiency (QE), and a slit length of equal size for low resolution spectroscopy. These characteristics combined with the availability of long blocks of observing time, will allow the researchers at Ohio State to carry out large scale survey programs to a level of sensitivity that would be otherwise impossible. The first of the two major undertakings will be the compilation of a multi-color near infrared (IR) atlas of normal galaxies of all types. The near IR light, which closely tracks the mass distribution, is expected to reveal structures not visible optically. The study of dark clouds and regions of star formation represents the first time a complete survey over a range of cloud masses will be obtained and will establish, for example, how the stellar initial mass function varies with environment.