Detection of NH3 Molecules in the Interstellar Medium by Their Microwave Emission

Details Detection of NH3 Molecules in the Interstellar Medium by Their Microwave Emission Detection of NH3 Molecules in the Interstellar Medium by Their Microwave Emission

Dec 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968phrvl..21.1701c&link_type=abstract

Physical Review Letters, vol. 21, Issue 25, pp. 1701-1705

Physics

128

Scientific paper

Ammonia has been found in the direction of the galactic center by detection of its J=1, K=1 inversion transition. The region of emission closely corresponds to the position, velocity, and size of strong OH absorption. Collisional and radiative excitation mechanisms are discussed. The column density of NH3 and the kinetic temperature of the interstellar gas cloud are estimated to be 2×1016/cm2 and 23°K, respectively.

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