An Experimental Approach to the Prediction of Complete Millimeter/Submillimeter Spectra at Astrophysical Temperatures: Applications to Confusion Limited Astrophysical Observations

奖项编号：AST-0805853发明：俄亥俄州立大学研究基金会PI：Frank C de LuciaTITLE：在天体物理温度下预测完整毫米/亚毫米光谱的实验方法：应用于混淆有限的天体物理观测本项目将开发和开发一种新的方法，用于在毫米/亚毫米光谱区域的实验室光谱。它有望提供一条通向一个长期寻求和具有挑战性的目标的途径：显著减少未知谱线(U线)的数量，减少毫米和亚毫米天文光谱的杂波限制。在这里，完整的、强度校准的光谱(在适当的明确定义的温度范围内获得)将用于产生对感兴趣的分子物种的每一次跃迁所涉及的所有谱线频率、跃迁强度和低态能量的直接实验测量。这些都是天体物理学界所需要的参数。同样值得注意的是，这种实验方法将大大减少具有中等复杂光谱的分子所需的分析时间。作为这个项目的基础的光谱科学和技术以及它与用于谱线识别的传统自举量子力学模型的关系也将得到发展。作为两种方法共生的一个例子，实验方法提供了在任意温度下的完整和强度校准的光谱，以及每条线的较低的态能量和跃迁强度。后者是功能强大的信息片段，通常不能在引导周期的分配阶段使用。反过来，量子模型将为实验方法提供强度校准，并提供一种建立误差极限的手段。这项工作预计将对分子天体物理学及其跨学科合作伙伴化学和光谱学领域产生重大影响。因此，该项目将与一个由国内和国际天文学家、化学家和光谱学家组成的不同团队合作进行。通过该项目，一名博士后助理研究员和一名研究生将接受实验/实验室毫米/亚毫米光谱学方面的培训。

AWARD NO: AST - 0805853INSTITUTION: Ohio State University Research FoundationPI: Frank C De LuciaTITLE: An Experimental Approach to the Prediction of Complete Millimeter/Submillimeter Spectra at Astrophysical Temperatures: Applications to Confusion Limited Astrophysical ObservationsABSTRACTThis project will develop and exploit a new approach to laboratory spectroscopy in the millimeter/submillimeter spectral region. It is expected to provide a path to a long sought and challenging goal: a significant reduction in the number of unidentified lines (U-lines) and a reduction in the clutter limit of millimeter and submillimeter astronomical spectra.Here, complete, intensity calibrated spectra (obtained over an appropriate range of well defined temperatures) will be used to produce direct experimental measurements of all of the line frequencies, transition strengths, and the energies of the lower states involved in each transition of molecular species of interest. These are the parameters required by the astrophysical community. Also of note, this experimental approach will reduce the analysis time required for molecules with even moderately complex spectra by a large factor. The spectroscopic science and technology that are the foundations of this project and its relation to the traditional bootstrap quantum mechanical models used in line identification will also be developed. As an example of the symbiosis of the two approaches, the experimental approach provides a complete and intensity calibrated spectrum at an arbitrary temperature, and the lower state energy and transition strength of each line. The latter are powerful pieces of information that are ordinarily not available for use in the assignment phase of the bootstrap cycle. In turn, the quantum models will provide intensity calibration to the experimental approach and a means for establishing error limits. This work is expected to have a major impact on the field of molecular astrophysics and its interdisciplinary partners, chemistry and spectroscopy. The project will therefore be carried out in collaboration with a diverse team of national and international astronomers, chemists and spectroscopists. Both a postdoctoral research associate and a graduate student will be trained in experimental/laboratory millimeter/submillimeter spectroscopy through this project.