Search Publications
Missions
Journals
Publication Years
The Plasma Environment in Comets over a Wide Range of Heliocentric Distances: Application to Comet C/2006 P1 (McNaught)
Rubin, M.; Shou, Y.; Toth, G. +3 more
On 2007 January 12, comet C/2006 P1 (McNaught) passed its perihelion at 0.17 AU. Abundant remote observations offer plenty of information on the neutral composition and neutral velocities within 1 million kilometers of the comet nucleus. In early February, the Ulysses spacecraft made an in situ measurement of the ion composition, plasma velocity, …
Ion composition in Titan's exosphere via the Cassini Plasma Spectrometer I: T40 encounter
Johnson, R. E.; Smith, H. T.; Crary, F. J. +1 more
investigate the complex interaction between Saturn's magnetosphere and Titan's upper ionosphere using ion data acquired by the Cassini Plasma Spectrometer (CAPS) during the T40 encounter. Bounds on ion-group abundances at altitudes between ~2733 and ~12,541 km are determined by fitting mass spectra with model functions derived from instrument cali…
Faint Luminescent Ring over Saturn’s Polar Hexagon
Filacchione, Gianrico; Adriani, Alberto; Oliva, Fabrizio +2 more
Springtime insolation is presently advancing across Saturn's north polar region. Early solar radiation scattered through the gaseous giant's atmosphere gives a unique opportunity to sound the atmospheric structure at its upper troposphere/lower stratosphere at high latitudes. Here, we report the detection of a tenuous bright structure in Saturn's …
Radio reflection imaging of asteroid and comet interiors I: Acquisition and imaging theory
Sava, Paul; Ittharat, Detchai; Grimm, Robert +1 more
Imaging the interior structure of comets and asteroids can provide insight into their formation in the early Solar System, and can aid in their exploration and hazard mitigation. Accurate imaging can be accomplished using broadband wavefield data penetrating deep inside the object under investigation. This can be done in principle using seismic sy…
Microwave thermal emission from the zodiacal dust cloud predicted with contemporary meteoroid models
Schwarz, Dominik J.; Dikarev, Valery V.
Predictions of the microwave thermal emission from the zodiacal dust cloud are made using several contemporary meteoroid models to construct the distributions of the cross-section area of dust in space, and by applying the Mie light-scattering theory to estimate the temperatures and emissivities of dust particles in a wide range of sizes and helio…
Investigation of scaling properties of a thin current sheet by means of particle trajectories study
Sasunov, Yu. L.; Khodachenko, M. L.; Alexeev, I. I. +4 more
A thin current sheet (TCS), with the width of an order of thermal proton gyroradius, appears a fundamental physical object which plays an important role in structuring of major magnetospheric current systems (magnetotail, magnetodisk, etc.). The TCSs are nowadays under extensive study by means of space missions and theoretical models. We consider …
Inflation in de Sitter spacetime and CMB large scale anomaly
Zhao, Dong; Li, Ming-Hua; Wang, Ping +1 more
The influence of cosmological constant-type dark energy in the early universe is investigated. This is accommodated by a new dispersion relation in de Sitter spacetime. We perform a global fit to explore the cosmological parameter space by using the CosmoMC package with the recently released Planck TT and WMAP polarization datasets. Using the resu…
Matching of Large Images Through Coupled Decomposition
Muller, Jan-Peter; Sidiropoulos, Panagiotis
A method for inverting the touchdown shock of the Philae lander on comet 67P/Churyumov-Gerasimenko
Arnold, Walter; Seidensticker, Klaus J.; Fischer, Hans-Herbert +7 more
The landing of Philae on comet 67P/Churyumov-Gerasimenko is scheduled for November 12th, 2014. Each of the three landing feet houses in one sole a tri-axial acceleration sensor of the Comet Acoustic Surface Sounding Experiment (CASSE). They will thus be the first sensors to be in mechanical contact with the comet surface. CASSE will be in listenin…
Witnessing Gas Mixing in the Metal Distribution of the Hickson Compact Group HCG 31
Mendes de Oliveira, C.; de Mello, D. F.; Amram, P. +3 more
We present for the first time direct evidence that in a merger of disk galaxies, the pre-existing central metallicities will mix as a result of gas being transported in the merger interface region along the line that joins the two coalescing nuclei. This is shown using detailed two-dimensional kinematics as well as metallicity measurements for the…