A Medium Resolution Spectrograph for the NASA Infrared Telescope Facility

摘要 Rayner，J.T. 9319039 该项目将建造一台0.9-5.5微米的介质交叉色散摄谱仪，作为美国宇航局莫纳克亚山3米红外望远镜设施（IRTF）的设施仪器。 结合IRTF的快速倾斜辅助装置，摄谱仪将在1-2.5 μ m处容纳0.25-0.30”图像，并通过0.3“x5”狭缝衍射限制光谱分辨率R=1200。 仪器将使用512 x512 Insb焦平面阵列。 与现有光谱仪相比，该仪器的主要创新是能够以高灵敏度和极高的角分辨率在整个近红外范围内进行观测，使其成为许多关键天文项目的理想仪器。 其中包括对太阳系中的小天体进行光谱测量，以加强对太阳系如何形成的研究;对最邻近的分子云中的年轻恒星天体进行光谱测量，以探测可能的行星形成地点;对星星形成区域进行光谱测量，以确定年轻恒星的光谱类型，为星星形成提供新的见解;调查星系的形成和早期演化，并在强大的红外星系中区分星暴和怪物。 ***

ABSTRACT Rayner, J.T. 9319039 This project will construct a 0.9-5.5 um medium cross- dispersed spectrograph for use as a facility instrument at the 3-meter NASA Infrared Telescope Facility (IRTF) on Mauna Kea. In conjunction with a fast tip-tilt secondary at the IRTF, the spectrograph will accommodate 0.25-0.30" images at 1-2.5 um and diffraction-limited a spectral resolution of R=1200, through a 0.3"x5" slit. The instrument will use a 512x512 Insb focal plane array. The major innovation in this instrument over existing spectrographs is the capability of observing over the entire near infrared range at high sensitivity and at very high angular resolution, making it an ideal instrument for a number of key astronomical projects. These include spectroscopic surveys of small bodies in the solar system to enhance studies of how our solar system formed, spectroscopic surveys of young stellar objects in the most nearby molecular clouds to probe sites of possible planet formation, spectroscopic surveys of star forming regions to spectrally type young embedded stars to provide new insights into star formation, investigation of galaxy formation and early evolution, and distinguishing starbursts and monsters in powerful infrared galaxies. ***