Physics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.298..454i&link_type=abstract
Nature, vol. 298, July 29, 1982, p. 454, 455.
Physics
5
Airglow, Atmospheric Temperature, Oxygen Atoms, Oxygen Spectra, Thermodynamic Equilibrium, Thermosphere, Absorption Spectra, Atom Concentration, Atomic Collisions, Emission Spectra, Fine Structure, Transition Probabilities
Scientific paper
Although the 63-micron emission of atomic oxygen generated by the 3P1-3P2 transition in the ground electronic state has been attributed to an important thermospheric cooling system, the zenith emission intensities measured by Grossmann and Offermann (1978) are weaker than those expected from theoretical calculations based on the local thermodynamic equilibrium (LTE). If the Grossmann and Offermann interpretation of this discrepancy as due to a lower population temperature of 0(3P sub J) (where J = zero, 1 and 2), rather than LTE, is correct, then the 63-micron emission is a less important coolant of the thermosphere than has been thought. An improved formulation of the previous calculation, however, is shown to yield an LTE model value for 0(3P sub J) whose 63-micron zenith intensities are consistent with measurements.
Iwagami Naomoto
Ogawa Takuro
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