Search Publications
Investigation of the force balance in the Titan ionosphere: Cassini T5 flyby model/data comparisons
Luhmann, J. G.; Wahlund, J. -E.; Waite, J. H. +5 more
Cassini's Titan flyby on 16 April, 2005 (T5) is the only encounter when the two main ionizing sources of the moon's atmosphere, solar radiation and corotating plasma, align almost anti-parallel. In this paper a single-fluid multi-species 3D MHD model of the magnetospheric plasma interaction for T5 conditions is analyzed. Model results are compared…
High-resolution 3-µm spectra of Jupiter: Latitudinal spectral variations influenced by molecules, clouds, and haze
Geballe, T. R.; Minh, Y. C.; Seo, H. J. +3 more
We present latitudinally-resolved high-resolution ( R = 37,000) pole-to-pole spectra of Jupiter in various narrow longitudinal ranges, in spectral intervals covering roughly half of the spectral range 2.86-3.53 µm. We have analyzed the data with the aid of synthetic spectra generated from a model jovian atmosphere that included lines of CH <…
Monte Carlo modeling of Io’s [OI] 6300 Å and [SII] 6716 Å auroral emission in eclipse
Stapelfeldt, K.; Trafton, L. M.; Moore, C. +4 more
We present a Monte Carlo (MC) model of [OI] 6300 Å and [SII] 6716 Å emission from Io entering eclipse. The simulation accounts for the 3-D distribution of SO 2, O, SO, S, and O 2 in Io's atmosphere, several volcanic plumes, and the magnetic field around Io. Thermal electrons from the jovian plasma torus are input along the si…
Correlations between VIMS and RADAR data over the surface of Titan: Implications for Titan’s surface properties
Barnes, J. W.; Brown, R. H.; Clark, R. N. +22 more
We apply a multivariate statistical method to Titan data acquired by different instruments onboard the Cassini spacecraft. We have searched through Cassini/VIMS hyperspectral cubes, selecting those data with convenient viewing geometry and that overlap with Cassini/RADAR scatterometry footprints with a comparable spatial resolution. We look for co…
Solar phase curves and phase integrals for the leading and trailing hemispheres of Iapetus from the Cassini Visual Infrared Mapping Spectrometer
Buratti, Bonnie J.; Mosher, Joel A.; Blackburn, David G. +1 more
We performed photometry of Cassini Visual Infrared Mapping Spectrometer observations of Iapetus to produce the first phase integrals calculated directly from solar phase curves of Iapetus for the leading hemisphere and to estimate the phase integrals for the trailing hemisphere. We also explored the phase integral dependence on wavelength and geom…
Mineralogy of the Phoenix landing site from OMEGA observations and how that relates to in situ Phoenix measurements
Bibring, J. -P.; Arvidson, R. E.; Gondet, B. +4 more
We present an analysis comparing observations acquired by the Mars Express Observatoire pour la Minéralogie l'Eau, les Glaces et l'Activité (OMEGA) and Phoenix lander measurements. Analysis of OMEGA data provides evidence for hydrous and ferric phases at the Phoenix landing site and the surrounding regions. The 3 µm hydration band deepens wi…
Low-temperature magnetic properties of iron-bearing sulfides and their contribution to magnetism of cometary bodies
Kohout, Tomáš; Kosterov, Andrei; Haloda, Jakub +2 more
In this study we present a review of low-temperature magnetic properties of alabandite (Fe, Mn)S, daubreelite FeCr 2S 4, pyrrhotite Fe 1-xS and troilite FeS updated with new experimental data. The results indicate that besides FeNi alloys mainly daubreelite with its Curie temperature T C ∼ 150…
Moonlet induced wakes in planetary rings: Analytical model including eccentric orbits of moon and ring particles
Seiß, M.; Spahn, F.; Schmidt, Jürgen
Saturn's rings host two known moons, Pan and Daphnis, which are massive enough to clear circumferential gaps in the ring around their orbits. Both moons create wake patterns at the gap edges by gravitational deflection of the ring material (Cuzzi, J.N., Scargle, J.D. [1985]. Astrophys. J. 292, 276-290; Showalter, M.R., Cuzzi, J.N., Marouf, E.A., E…
The atmospheric temperatures over Olympus Mons on Mars: An atmospheric hot ring
Geminale, A.; Formisano, V.; Rinaldi, G. +1 more
We study the thermal fields over Olympus Mons separating seasons (northern spring and summer against southern spring and summer) and local time observations (day side versus night side). Temperature vertical profiles retrieved from Planetary Fourier Spectrometer on board Mars Express (PFS-MEX) data have been used. In many orbits (running north to …
Interfacial liquid water on Mars and its potential role in formation of hill and dune gullies
Markiewicz, Wojciech J.; Kossacki, Konrad J.
Gullies are among the most intriguing structures identified on the surface of Mars. Most common are gullies located on the slopes of craters which are probably formed by liquid water transported by shallow aquifers (Heldmann, J.L., Carlsson, E., Johansson, H., Mellon, M.T., Toon, O.B. [2007]. Icarus 188, 324-344). Two particular types of gullies a…