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机构：俄亥俄州立大学研究基金会pi: Frank C De lucia题目：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摘要该项目将开发和利用毫米/亚毫米光谱区域的实验室光谱的新方法。它有望为一个长期寻求和具有挑战性的目标提供一条途径：显著减少未识别线（u线）的数量，并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（在适当的定义温度范围内获得）将用于产生所有谱线频率的直接实验测量，跃迁强度，以及每个感兴趣的分子物种的跃迁所涉及的较低状态的能量。这些是天体物理学界所要求的参数。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。作为本项目基础的光谱科学和技术及其与用于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，实验方法在任意温度下提供了一个完整的和强度校准的光谱，并且每条线的状态能量和转变强度都较低。后者是强大的信息片段，通常在引导周期的赋值阶段无法使用。反过来，量子模型将为实验方法提供强度校准和建立误差限制的手段。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多元化团队合作开展。通过该项目，将培养一名博士后研究员和一名研究生在实验/实验室毫米/亚毫米光谱学方面的研究。

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.