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

该项目将使用最近在加州理工学院亚毫米波天文台（CSO）委托的新毫米波光谱仪Z-Spec。 Z-Spec是一种光栅光谱仪，使用160个测辐射热计，跨越195-305 GHz的完整1 mm大气窗口。 科学目标是：1）使用多条CO谱线测量构成远红外/亚毫米背景的发光尘埃星系样本的红移; 2）对邻近星系进行宽带线巡天，在单一光谱中测量CO同位素、密度示踪剂和光解示踪剂。更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实践培训，和Z-Spec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.