Now showing items 1-10 of 26
Multiple Scattering of Light in a Spherical Cometary Atmosphere with an Axisymmetric Dust Jet: II. Image Simulation
(Elsevier, 1993-08)
A numerical solution for the multiple scattering of light in spherical axisymmetric geometry is used to simulate observations of a model comet atmosphere as it would be seen by a near-flying satellite or by general wide-angle ...
High-resolution spectra of the 6300-A region of Comet P/Halley
(Elsevier, 1991-06)
A series of high resolution spectra of the 6300-A region of Comet P/Halley were taken with the echelle/reticon system on the 61-in. telescope at the Harvard-Smithsonian Oak Ridge Observatory from 23 October 1985 through 5 ...
Zeus-2D Simulations of Laser-Driven Radiative Shock Experiments
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2005-07)
A series of experiments is underway using the Omega laser to examine radiative shocks of astrophysical relevance. In these experiments, the laser accelerates a thin layer of low- Z material, which drives a strong shock ...
IUE observations of H Lyman-[alpha] in comet P/Giacobini-Zinner
(Elsevier, 1992-06)
Comet P/Giacobini-Zinner (1985 XIII) was observed during the flyby of the International Cometary Explorer (ICE) satellite and during the 3 preceding months by the International Ultraviolet Explorer (IUE) satellite. Models ...
Pick-up Ion Measurements in the Heliosphere – A Review
(Kluwer Academic Publishers; Springer Science+Business Media, 2000-03)
Measurements of the composition and spatial distribution of pick-up ionsinside the heliosphere are reviewed. The first interstellar 4 He + pick-up ions were detected with the SULEICA instrument on the AMPTEspacecraft near ...
Uranus deep atmosphere revealed
(Elsevier, 1989-12)
We have examined Uranus' radio spectrum and the latitudinal variation in its radio brightness temperature. We conclude that Uranus' spectrum cannot be explained with models based upon thermochemical equilibrium. The spectrum ...
Methane photochemistry and haze production on Neptune
(Elsevier, 1988-06)
A numerical model was used to study methane photochemistry in the stratosphere of Neptune. The observed mixing ratio of methane, 2%, forces photolysis to occur near the CH4 homopause. For an assumed nominal value of the ...
A time-dependent dusty gas dynamic model of axisymmetric cometary jets
(Elsevier, 1990-03)
The first results of a new time-dependent, axisymmetric dusty gas dynamical model of inner cometary atmospheres are presented. The model solves the coupled, time-dependent continuity, momentum, and energy equations for a ...
Recent Experimental Results and Modelling of High-Mach-Number Jets and the Transition to Turbulence
(Kluwer Academic Publishers; Springer Science + Business Media, Inc., 2005-07)
In recent years, we have carried out experiments at the University of Rochester’s Omega laser in which supersonic, dense-plasma jets are formed by the interaction of strong shocks in a complex target assembly (Foster et ...
The role of hydrocarbons in the lonospheres of the outer planets
(Elsevier, 1975-06)
The role of hydrocarbons as a possible sink for H+ and H3+ ions in the lower ionosphere of the outer planets is examined. Calculations indicate that H+ and H3+ are efficiently converted to hydrocarbon ions on reaction with ...