论文标题
分子光谱数据库的荟萃分析以及一些未来设施的分子检测前景
A meta-analysis of molecular spectroscopy databases, and prospects of molecule detection with some future facilities
论文作者
论文摘要
分子广泛存在于星际空间中，可以通过光谱观测来检测。迄今为止，在星际培养基或偶色信封中已经确定了271种以上的分子物种。在实验室中测得的分子光谱参数使新物种的鉴定和物理参数的推导可能。这些光谱参数系统地收集到数据库中，最常用的两个是CDM和JPL数据库。尽管新的光谱参数是连续测量/计算并添加到这些数据库中的，但在任何时间点，现有的光谱数据最终限制了在天文学数据中可能可以识别的分子。在这项工作中，我们对CDM和JPL数据库进行了荟萃分析。我们在这两个数据库中显示了过渡频率及其不确定性的统计数据，并在某些物理环境下讨论了线混乱问题。然后，我们评估使用一些预计将来会进行光谱观测的设施在普通ISM环境中检测分子的前景。结果表明，CSST/HSTDM和SKA1-MID具有检测一些复杂的有机分子甚至氨基酸的潜力，并具有对ISM环境的合理假设。
Molecules reside broadly in the interstellar space and can be detected via spectroscopic observations. To date, more than 271 molecular species have been identified in interstellar medium or circumstellar envelopes. Molecular spectroscopic parameters measured in laboratory make the identification of new species and derivation of physical parameters possible. These spectroscopic parameters are systematically collected into databases, two of the most commonly used being the CDMS and JPL databases. While new spectroscopic parameters are continuously measured/calculated and added to those databases, at any point in time it is the existing spectroscopic data that ultimately limits what molecules can possibly be identified in astronomical data. In this work, we conduct a meta-analysis of the CDMS and JPL databases. We show the statistics of transition frequencies and their uncertainties in these two databases, and discuss the line confusion problem under certain physical environments. We then assess the prospects of detecting molecules in common ISM environments using a few facilities that are expected to be conducting spectroscopic observations in the future. Results show that CSST/HSTDM and SKA1-mid have the potential to detect some complex organic molecules, or even amino acids, with reasonable assumptions about ISM environments.
