Broadband Millimeter Spectroscopy with Z-spec: Molecular Diagnostics of Local ULIRGs and Redshifts for Submillimeter Galaxies

该项目将使用一种新的毫米波光谱仪，Z-Spec，最近在加州理工大学亚毫米天文台(CSO)投入使用。Z-Spec是一种光栅光谱仪，它使用160个测辐射热计，覆盖195-305 GHz整个1毫米大气窗口。科学目标是：1)使用多条CO谱线测量组成远红外/亚毫米背景的发光尘埃星系样本的红移；2)对附近星系进行宽带谱线测量，测量单个光谱中的CO同位素、密度示踪剂和光解示踪剂。广泛的影响包括对学生和博士后进行毫米波仪器和技术的动手培训，以及Z-Spec对社区的可用性。

This project will use a new millimeter-wave spectrometer, Z-Spec, recently commissioned at the Caltech Submillimeter Observatory (CSO). Z-Spec is a grating spectrometer that uses 160 bolometers spanning the complete 1 mm atmospheric window from 195-305 GHz. The scientific goals are to 1) Use multiple CO lines to measure redshifts of a sample of the luminous dusty galaxies that make up the far-IR/submillimeter background; and 2) Conduct broad-band line surveys of nearby galaxies measuring CO isotopes, density tracers, and photo-dissociation tracers in a single spectrum.Broader impacts include hands-on training of students and postdocs in millimeter-wave instrumentation and techniques, and availability of Z-Spec to the community.