Atomic and molecular line observations of galaxies.

Details Atomic and molecular line observations of galaxies. Atomic and molecular line observations of galaxies.

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.354..141n&link_type=abstract

ESA Colloquium on Targets for Space-Based Interferometry, p. 141 - 144

Physics

Scientific paper

The study of the molecular interstellar medium has been based on the observation of the ubiquitous CO emission at millimeter wavelengths. With the advent of large millimeter and submillimeter wave telescopes, molecular species much less abundant than CO such as HCN and the ion HCO+ whose excitation requirements are more stringent than those of CO have been used to probe regions of high densities and temperatures in the vicinity of galactic nuclei. Spectrometers on board the ISO satellite will give us an opportunity of observing far infrared atomic fine-structure and molecular lines in a large number of galaxies. The observations of parent molecules together with their photodissociation products in a wide spectral band will provide severe constraints to models of physico-chemistry.

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