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Molecules reside broadly in the interstellar space and can be detected viaspectroscopic observations. To date, more than 271 molecular species have beenidentified in interstellar medium or circumstellar envelopes. Molecularspectroscopic parameters measured in laboratory make the identification of newspecies and derivation of physical parameters possible. These spectroscopicparameters are systematically collected into databases, two of the mostcommonly used being the CDMS and JPL databases. While new spectroscopicparameters are continuously measured/calculated and added to those databases,at any point in time it is the existing spectroscopic data that ultimatelylimits what molecules can possibly be identified in astronomical data. In thiswork, we conduct a meta-analysis of the CDMS and JPL databases. We show thestatistics of transition frequencies and their uncertainties in these twodatabases, and discuss the line confusion problem under certain physicalenvironments. We then assess the prospects of detecting molecules in common ISMenvironments using a few facilities that are expected to be conductingspectroscopic observations in the future. Results show that CSST/HSTDM andSKA1-mid have the potential to detect some complex organic molecules, or evenamino acids, with reasonable assumptions about ISM environments.

A meta-analysis of molecular spectroscopy databases, and prospects of molecule detection with some future facilities