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 SKA 1-mid have the potential to detect some complex organic molecules,or even amino acids,with reasonable assumptions about ISM environments.

Xin Liu;Fujun Du

Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China

天文和天体物理学研究

[1]Xin Liu;Fujun Du-.A Meta-analysis of Molecular Spectroscopy Databases,and Prospects of Molecule Detection with Some Future Facilities)[J].天文和天体物理学研究,2022(10):157-171

circumstellar,CDMS,HSTDM

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