Search Publications
Cometary cryo-volcanism: Source regions and a model for the UT 2005 June 14 and other mini-outbursts on Comet 9P/Tempel 1
Feldman, Paul D.; A'Hearn, Michael F.; Belton, Michael J. S. +1 more
Data on the UT 2005 June 14 mini-outburst of Comet 9P/Tempel 1 taken from different viewpoints have been examined for morphological differences and parallax. The data were taken with the Hubble Space Telescope (HST), from the Deep Impact (DI) spacecraft, and from the Calar Alto Observatory, Spain. The mini-outburst source region was found to be lo…
Diagnostics of Titan's stratospheric dynamics using Cassini/CIRS data and the 2-dimensional IPSL circulation model
Teanby, N. A.; Bézard, B.; Lebonnois, S. +6 more
The dynamics of Titan's stratosphere is discussed in this study, based on a comparison between observations by the CIRS instrument on board the Cassini spacecraft, and results of the 2-dimensional circulation model developed at the Institute Pierre-Simon Laplace, available at http://www.lmd.jussieu.fr/titanDbase [Rannou, P., Lebonnois, S., Hourdin…
Infrared (0.83 5.1 µm) photometry of Phoebe from the Cassini Visual Infrared Mapping Spectrometer
Brown, R. H.; Buratti, B. J.; Clark, R. N. +8 more
Three weeks prior to the commencement of Cassini's 4 year tour of the saturnian system, the spacecraft executed a close flyby of the outer satellite Phoebe. The infrared channel of the Visual Infrared Mapping Spectrometer (VIMS) obtained images of reflected light over the 0.83-5.1 µm spectral range with an average spectral resolution of 16.5…
Ultraviolet observations of Phoebe from the Cassini UVIS
Hendrix, Amanda R.; Hansen, Candice J.
Observations of Saturn's distant moon Phoebe were made at far-ultraviolet (FUV) (1100-1900 Å) and extreme-ultraviolet (EUV) (600-1100 Å) wavelengths by the Cassini Ultraviolet Imaging Spectrograph (UVIS) during the Cassini spacecraft flyby on June 11, 2004. These are the first UV spectra of Phoebe and the first detection of water ice on a Solar Sy…
A model for the temperature-dependence of tidal dissipation in convective plumes on icy satellites: Implications for Europa and Enceladus
Showman, Adam P.; Mitri, Giuseppe
To explain the formation of surface features on Europa, Enceladus, and other satellites, many authors have postulated the spatial localization of tidal heating within convective plumes. However, the concept that enhanced tidal heating can occur within a convective plume has not been rigorously tested. Most models of this phenomenon adopt a tidal h…
Photometric and spectral analysis of the distribution of crystalline and amorphous ices on Enceladus as seen by Cassini
Brown, R. H.; Buratti, B. J.; Jaumann, R. +3 more
Photometric and spectral analysis of data from the Cassini Visual and Infrared Mapping Spectrometer (VIMS) has yielded significant results regarding the properties and composition of the surface of Saturn's satellite Enceladus. We have obtained spectral cubes of this satellite, containing both spatial and spectral information, with a wavelength di…
Dust ring formation due to ice sublimation of radially drifting dust particles under the Poynting Robertson effect in debris disks
Kimura, Hiroshi; Kobayashi, Hiroshi; Watanabe, Sei-ichiro +1 more
In a disk with a low optical depth, dust particles drift radially inward by the Poynting-Robertson (P-R) drag rather than are blown out by stellar radiation pressure following destructive collisions. We investigate the radial distribution of icy dust composed of pure ice and refractory materials in dust-debris disks taking into account the P-R dra…
Identification of spectral units on Phoebe
Sotin, C.; Brown, R. H.; Baines, K. H. +31 more
We apply a multivariate statistical method to the Phoebe spectra collected by the VIMS experiment onboard the Cassini spacecraft during the flyby of June 2004. The G-mode clustering method, which permits identification of the most important features in a spectrum, is used on a small subset of data, characterized by medium and high spatial resoluti…
Gusev photometric variability as seen from orbit by HRSC/Mars-express
Scholten, F.; Neukum, G.; Pinet, P. +12 more
Minnaert and two-term phase function Hapke models are used to describe the photometric properties of the martian surface using HRSC (High Resolution Stereo Camera) multi-angular observations acquired along the ongoing Mars-Express mission. These observations can be pieced together to derive integrated phase functions over a wide range of phase ang…
The methane abundance and structure of Uranus' cloud bands inferred from spatially resolved 2006 Keck grism spectra
Sromovsky, L. A.; Fry, P. M.
Grism spectra of Uranus obtained at the Keck Observatory in 2006, using the NIRC2 instrument and adaptive optics, provide new constraints on the vertical structure of Uranus' cloud bands and on the volume mixing ratio of methane. The best model fits to H-band spectra (1.49-1.635 µm) are found for a methane volume mixing ratio of 1.0 ± 0.25% …