The CDMS, a database for molecular line identification

Details The CDMS, a database for molecular line identification The CDMS, a database for molecular line identification

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mavo.proc...31m&link_type=abstract

Multi-wavelength Astronomy and Virtual Observatory, Proceedings of the EURO-VO Workshop, held at the European Space Astronomy Ce

Astronomy and Astrophysics

Astronomy

Virtual Observatory

Scientific paper

The catalog section of the Cologne Database for Molecular Spectroscopy, CDMS, contains spectral lines of atomic and molecular species that have been or may be observed in space. Mostly rotational transition frequencies are provided from the radio-frequency to the terahertz region and, in part, even to the mid-infrared. The line lists have been generated by fitting experimental data to established Hamiltonian models. As of the beginning of 2009, more than 500 species are present. With around 5 - 10 new or updated entries each month, the CDMS catalog is growing rapidly. While the catalog consists of ascii tables at present we intend to put it into a VO compatible database environment in the future. The main features of the CDMS will be presented, and the need for the system to remain open for extension and improvement will be emphasized. Some problems will be discussed that may occur if entries for one species from different sources are compared. Examples discussed are difficulties in quantum number assignment or quality control. Considerations for Herschel and SOFIA on one hand and for telescope arrays such as ALMA on the other will be addressed.

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