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Investigation of Titan Aerogravity Assist for Capture into Orbit About Saturn
Lyne, James; Ramsey, Philip
XMM-Newton Detection of the Supernova Remnant G337.2+0.1
Albacete Colombo, Juan F.; Benaglia, Paula; Combi, Jorge A. +1 more
We report the first XMM-Newton detection of the SNR candidate G337.2+0.1 (=AX J1635.9-4719). The object shows centrally filled and diffuse X-ray emission. The emission peaks in the hard 3.0-10.0 keV band. A spatially resolved spectral study confirms that the column density of the central part of the SNR is about NH~5.9(+/-1.5)×1022…
Planetary science: Saturn's bared mini-moons
Schmidt, Jürgen; Spahn, Frank
Propeller-shaped structures seem to reveal the presence of moonlets, about 100 metres in diameter, embedded in Saturn's rings. This discovery adds to our picture of how the rings formed and are evolving.
Neon dewar for the X-ray spectrometer onboard Suzaku
Mitsuda, K.; Kelley, R. L.; Fujimoto, R. +6 more
The X-ray spectrometer (XRS) onboard Suzaku is the first X-ray microcalorimeter array in orbit. The sensor array is operated at 60 mK, which is attained by an adiabatic demagnetization refrigerator and superfluid liquid helium. The neon dewar is a vacuum-insulated container for the XRS. The requirements for the XRS dewar are to maintain the detect…
Titan, Fractals, and Filtering of Cassini Altimeter Data
Callahan, P.; Wall, S. D.; Riccio, D. +2 more
An ionized disc reflection component for the X-ray spectrum of NGC 4051 and IRAS13224-3809?
Cappi, M.; Ponti, G.; Fabian, A. C. +2 more
A spectral variability study of the two Narrow Line Seyfert 1 galaxies NGC 4051 and IRAS13224-3809 is presented. Both sources show a high degree of flux and spectral variability. The nuclear emission, lightly absorbed by warm material, has been decomposed into a direct power law emission and an ionized disc reflection plus constant emission from d…
Spin of Planetary Probes in Atmospheric Flight
Lorenz, R. D.
Probes that enter planetary atmospheres are often spun during entry or descent for a variety of reasons. Their spin rate histories are influenced by often subtle effects. The spin requirements, control methods and flight experience from planetary and earth entry missions are reviewed. An interaction of the probe aerodynamic wake with a drogue para…
Chemometric evaluation of time-of-flight secondary ion mass spectrometry data of minerals in the frame of futurein situ analyses of cometary material by COSIMA onboard ROSETTA
Silén, Johan; Thirkell, Laurent; Varmuza, Kurt +5 more
Analysis of the Interaction between Low-Frequency Waves and Ions in the High-Altitude Cusp Region Observed by Satellite Cluster
Balogh, A.; Reme, H.; Cao, Jin-Bin +8 more
The energy transfer between ions (protons) and low frequency waves (LFWs) in the frequency range f1 from 0.3 to 10 Hz is observed by Cluster crossing the high-altitude polar cusp. The energy transfer between low frequency waves and ions has two means. One is that the energy is transferred from low frequency waves to ions and ions energy…
Early Inner Solar System Impactors: Physical Properties of Comet Nuclei and Dust Particles Revisited
Lasue, J.; Levasseur-Regourd, A. C.; Desvoivres, E.
During the epoch of early bombardment, terrestrial planets have been heavily impacted by cometary nuclei and cometary dust particles progressively injected in the interplanetary medium. Stardust and Deep Impact missions confirm that the nuclei are porous, loosely consolidated objects, with densities below 1,000 kg m-3, and that they oft…