Search Publications
The Contribution of Asteroid Dust to the Interplanetary Dust Cloud: The Impact of ULYSSES Results on the Understanding of Dust Production in the Asteroid Belt and of the Formation of the IRAS Dust Bands
Mann, Ingrid; Grün, Eberhard; Wilck, Martin
Investigations of the zodiacal dust cloud give evidence for a significant contribution of asteroidal dust to the interplanetary dust cloud, a result which can now be compared to measurements of the ULYSSES dust detector during its passage of the asteroid belt. Especially we discuss the ULYSSES data with respect to the IRAS dust bands and consider …
The Structure of the Stratospheric Aerosol Layer in the Equatorial and South Polar Regions of Jupiter
Moreno, Fernando
A one-dimensional code to study the microphysical processes affecting aerosol particles in the jovian stratosphere and upper troposphere has been developed. The algorithms are based on those developed by Turcoet al.(Turco, R. P., P. Hamill, O. B. Toon, R. C. Whitten, and C. S. Kiang 1979.J. Atmos. Sci.36, 699-717) and include the effects of partic…
Comet Shoemaker-Levy 9 Dust
Mumma, Michael J.; Hahn, Joseph M.; Rettig, Terrence W.
Comet Shoemaker-Levy 9 (S-L 9) was imaged with the Hubble Space Telescope from January 1994, through solar opposition on April 29, and until impact in July 1994. As noted by several observers, no anti-sunward dust tails were detected east of the fragments after opposition (D. Jewitt and J. Chen 1994,Periodic Comet Shoemaker-Levy 9(1993e), IAU Circ…
The CO Abundance on Neptune from HST Observations
Strobel, Darrell; Gautier, Daniel; Courtin, Régis
We have marginally detected two CO absorption bands in the UV reflection spectrum of Neptune measured by the HST Faint Object Spectrograph (FOS). They are the (1, 0) and (0, 0) Cameron bands at 1992 and 2063 Å. The interpretation of these features with a radiative transfer model-including Rayleigh, Raman, and particulate scattering processes-impli…
Dust Outflow Velocity of Comet Shoemaker-Levy 9
Hahn, Joseph M.; Rettig, Terrence W.; Sobczak, Gregory J.
Tidal dispersal of the dust comae of the ∼21 fragments of Comet Shoemaker-Levy 9 (S-L 9) became very pronounced in Hubble Space Telescope observations during the weeks prior to impact with Jupiter (T. W. Rettig, J. Hahn, S. C. Tegler, M. Mumma, and M. DiSanti 1994a,Periodic Comet Shoemaker-Levy 9(1993e), IAU Circular 6028; H. A. Weaver plus 20 oth…
HST Observation of Mg +in Outburst from Comet D/Shoemaker-Levy 9
Stern, S. A.; Feldman, P. D.; Weaver, H. A. +1 more
Ultraviolet spectra of fragment G1 of Comet D/Shoemaker-Levy 9 taken 4 days before impact (on 14 July 1994) by the Faint Object Spectrograph of the Hubble Space Telescope show a brief outburst of magnesium ions. The Mg+emission decays back to its quiescent (undetectable) level with a time constant of ∼1 min, consistent with the ions bei…
Compositional Mapping of Jupiter's Satellite Io Utilizing High Speed Multifilter Photometry during Mutual Satellite Occultations, 1990-1991
Lane, Arthur L.; Nelson, Robert M.; Hapke, Bruce W. +4 more
We observed selected mutual occultations of Jupiter's satellites in 1990-1991 at four wavelengths and we used the occultation profiles to constrain the areal distribution of selected spectrally active compounds on Io's surface. We performed high speed photometry of Io at four wavelengths while it was being occulted by another Galilean satellite. T…