J. T. Hallett

TL;DR: The Cassini Ultraviolet Imaging Spectrometer (UVIS) observed the extinction of photons from two stars by the atmosphere of Titan during the Titan flyby to determine the asymptotic kinetic temperature at the top of the atmosphere.

TL;DR: Neutral oxygen in the saturnian system shows variability, and the total number of oxygen atoms peaks at 4 × 1034, which is consistent with initially pure water ice bombarded by meteors.

TL;DR: In this paper, a rotational chemistry model was developed to predict the non-LTE state of hydrogen-dominated astrophysical objects under electron and photon forcing, and the model was applied to a wide range of physical conditions, including those appropriate to the outer-planet upper atmospheres, from the exobase to the hydrocarbon homopause.

TL;DR: In this article, rotationally resolved molecular hydrogen transitions originating from excitation of highly excited rovibrational levels of the X 1Σ state have been systematically identified for the first time in the Far Ultraviolet Spectroscopic Explorer (FUSE) observation of comets C/2000 WM1 (LINEAR) and C/2001 A2(LINEAR). Spectral assignments for the observed lines of H2 and other atomic and molecular species are given.

TL;DR: In this article, a new hydrogen physical chemistry model was developed at the fine-structure level for application to the giant outer planet thermospheres, which is applied to Uranus because observations of dayglow H2 X 1Σg+ (v) quadrupole and H3+ vibration-rotation emission made at NASA IRTF and UKIRT provide critical constraints for thermospheric modeling.