Molecular oxygen distribution in the upper atmosphere

Electronically excited molecular nitrogen and molecular oxygen in the high-latitude upper atmosphere

Relative vibrational populations of triplet B5g , W 1u, B ′36− u states of N2 and the b 16+ g state of O2 are calculated for different altitudes of the high-latitude upper atmosphere during auroral electron precipitation. It is shown that collisional processes cause a wavelength shift in the distribution of relative intensities for 1PG 1v=3 sequence of N2. The calculation of relative population...

Energetic oxygen in the upper atmosphere and the laboratory.

Detection of Oxygen and Carbon in the Upper Atmosphere of the Extrasolar Planet Hd209458b

Four transits of the planet orbiting the star HD209458 were observed with the STIS spectrograph on board HST. The wavelength domain (1180-1710Å) includes H i as well as C i, C ii, C iv, Nv, O i, S i, Si ii, Si iii, Si iv and Fe ii lines. During the transits, absorptions are detected in H i, O i and C ii (5±2%, 10±3.5% and 6±3%, respectively). No absorptions are detected for other lines. The 5% ...

Waves in Pluto’s Upper Atmosphere

Observations of the 2007 March 18 occultation of the star P445.3 (2UCAC 25823784; R = 15.3) by Pluto were obtained at high time resolution at five sites across the western United States and reduced to produce light curves for each station using standard aperture photometry. Global models of Pluto’s upper atmosphere are fitted simultaneously to all resulting light curves. The results of these mo...

Nonlinear internal waves in the upper atmosphere

This paper considers the large-scale dynamics generated in the upper atmosphere by the destabilization of a linear internal gravity wave and its eventual restabilization through nonlinear processes into a coherent pattern. The assumption of a strongly dissipative medium is relevant to wave propagation in the thermosphere range above 100 km. A parametric instability analysis is carried out invol...