Interstellar chemistry.

Details Interstellar chemistry. Interstellar chemistry.

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989msngr..57...10f&link_type=abstract

The Messenger, vol. 57, p. 10-11

Physics

Interstellar Molecules: Chemistry

Scientific paper

The research regarding interstellar chemistry with SEST can be divided into three categories: (i) searches for new molecules, (ii) studies of known molecules in order to shed light on their formation, and (iii) spectral scans - systematic observations of large frequency bands in a few interesting sources. Spectral scans give a good overview, not only of the chemical content, but also of physical traits. Typical excitation temperatures for different species give a handle on the kinetic temperature. The variation of excitation temperature with energy level and/or molecular state reveals regions of different temperature and density inside the beam (pointspread function) of the telescope. Of course, unidentified lines and unexpected molecules are also found

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