Search Publications
The structure of the Venusian current sheet
Malova, H. V.; Petrukovich, A. A.; Zelenyi, L. M. +7 more
We investigate the current sheet (CS) of the Venusian magnetotail using the data collected by the Venus Express mission in 2006-2010. We have found that the observed profiles of the main magnetic field component Bx have single-scale or double-scale structures. For single-scale CSs the Bx profile is well approximated by the Ha…
Permittivity of porous granular matter, in relation with Rosetta cometary mission
Brouet, Y.; Encrenaz, P.; Levasseur-Regourd, A. C. +1 more
We report measurements in laboratory conditions of the relative complex permittivity (hereafter permittivity) of porous material on a large range of frequencies from 50 MHz to 190 GHz. Such measurements, developed in preparation of the Rosetta mission to comet 67P/Churyumov-Gerasimenko, specifically for the MIRO radiometric experiment, were obtain…
COSAC prepares for sampling and in situ analysis of cometary matter from comet 67P/Churyumov-Gerasimenko
Ehrenfreund, P.; Szopa, C.; Ulamec, S. +11 more
The comet rendezvous mission Rosetta will be the first mission to encounter and land on a comet nucleus. After a 10-year journey Rosetta is set for rendezvous with Comet 67P/Churyumov-Gerasimenko. The mission goal is: to study the origin of comets; the relationship between cometary and interstellar material and its implications for the origin of t…
The occurrence of upstream waves in relation with the solar wind parameters: A statistical approach to estimate the size of the foreshock region
Regi, M.; De Lauretis, M.; Francia, P.
We studied the occurrence of upstream waves in the foreshock region and their relationship with the solar wind and interplanetary magnetic field parameters. To this purpose, we developed a method for a careful identification of the upstream wave events. The results of the statistical analyses based on Cluster data (2003-2010 years) confirm that th…
C1XS results-First measurement of enhanced sodium on the lunar surface
Grande, M.; Narendranath, S.; Sreekumar, P. +1 more
We describe the first unambiguous evidence of enhanced sodium on the lunar surface revealed by the Chandrayaan-1 X-ray Spectrometer (C1XS). The C1XS onboard the Chandrayaan-1 spacecraft was designed to map the surface elemental chemistry of the Moon using the X-ray fluorescence (XRF) technique. During the nine months of remote sensing observations…
Radial distribution of magnetic field in earth magnetotail current sheet
Petrukovich, A. A.; Dunlop, M. W.; Baumjohann, W. +4 more
Knowing the magnetic field distribution in the magnetotail current sheet (CS) is essential for exploring magnetotail dynamics. In this study, using a joint dataset of Cluster/TC-1, the radial profile of the magnetic field in the magnetotail CS with radial distances covering 8<r<20RE under different geomagnetic activity states (i.e…
Turbulent dynamics inside the cavity of hot flow anomaly
Dandouras, I.; Facskó, G.; Kovács, P.
In this paper the turbulent dynamics of a hot flow anomaly (HFA) event is investigated. The HFAs are transient plasma disturbances generated by the interaction of the bow shock (BS) and a tangential discontinuity (TD) embedded in the solar wind. The typical changes of the plasma parameters inside HFAs (increased plasma temperature, low bulk veloci…
Lutetia's lineaments
Küppers, M.; Thomas, N.; Besse, S. +2 more
The European Space Agency's Rosetta spacecraft flew by asteroid (21) Lutetia on July 10, 2010. Observations through the OSIRIS camera have revealed many geological features. Lineaments are identified on the entire observed surface of the asteroid. Many of these features are concentric around the North Pole Crater Cluster (NPCC). As observed on (43…
Monitoring atmospheric dust spring activity at high southern latitudes on Mars using OMEGA
Douté, S.
This paper presents a monitoring of the atmospheric dust in the south polar region during spring of Martian year 27. Our goal is to contribute to identifying the regions where the dust concentration in the atmosphere shows specific temporal patterns, for instance high, variable, and on the rise due to lifting or transport mechanisms. This identifi…
The far magnetotail response to an interplanetary shock arrival
Němeček, Z.; Šafránková, J.; Přech, L. +2 more
We present a study of the impact of the December 7, 2003 fast forward interplanetary (IP) shock on the distant tail of the Earth's magnetosphere. Using the data from the several spacecraft located in the solar wind/magnetosheath upstream to the Earth, we monitor a propagation of the IP shock from the L1 point to the magnetosphere. A behavior of th…