Search Publications

Direct evidence of solar wind deceleration in the foreshock of the Earth

Zhang, T. L.; Dandouras, I.; Lucek, E. +3 more

Although the solar wind deceleration in the terrestrial foreshock was noticed three decades ago, previous studies show some conflicting results. This paper presents direct evidence of solar wind deceleration in the foreshock of the Earth by using the data of two Cluster satellites. On 2 February 2003, the two satellites (C1 and C3) of Cluster miss…

Fluvial morphology of Naktong Vallis, Mars: A late activity with multiple processes

Mangold, N.; Neukum, G.; Ansan, V. +2 more

The morphology of fluvial valleys on Mars provides insight into surface and subsurface hydrology, as well as to Mars' past climate. In this study, Naktong Vallis and its tributaries were examined from high-resolution stereoscopic camera (HRSC) images, thermal emission imaging system (THEMIS) daytime IR images, and mars orbiter laser altimeter (MOL…

Nonthermal X-ray Emission in the N11 Superbubble in the Large Magellanic Cloud

Chu, Y. -H.; Williams, R. M.; Maddox, L. A. +1 more

We present the results of X-ray spectral analysis of the superbubble (SB) around the OB association LH9 in the H II complex N11 in the Large Magellanic Cloud. Using observations from Suzaku, we have modeled the X-ray emission over the energy range 0.2-7.5 keV. We constrained the thermal spectrum below 2 keV using a thermal plasma model found in a …

Salt tectonics and collapse of Hebes Chasma, Valles Marineris, Mars

Combe, J. -P.; Adams, J. B.; Gillespie, A. R. +4 more

New visible spectra and mineralogical assessment of (21) Lutetia, a target of the Rosetta mission

Lazzarin, M.; Marchi, S.; Magrin, S. +1 more

The Rosetta spacecraft, launched on March 2nd 2004, in the course of its journey to the comet 67P/Churyumov-Gerasimenko (encounter foreseen in 2014), will fly past two asteroids: (2867) Steins and (21) Lutetia. On September 5th 2008 (2867) Steins was encountered. In this paper, we present two visible spectra of (21) Lutetia of different spectral r…

Origin of Lyα absorption in nearby starbursts and implications for other galaxies

Schaerer, D.; Kunth, D.; Atek, H.

Context: Despite the privileged position that Lyman-α (Lyα) emission line holds in the exploration of the distant universe and modern observational cosmology, the origin of the observed diversity of Lyα profiles still needs to be thoroughly explained. Observations of nearby star forming galaxies bring their batch of apparent contradictions between…

Direct Observation of a Corotating Interaction Region by Three Spacecraft

Tappin, S. J.; Howard, T. A.

White-light observations of interplanetary disturbances have been dominated by interplanetary coronal mass ejections (ICMEs). This is because the other type of disturbance, the corotating interaction region (CIR), has proved difficult to detect using white-light imagers. Recently, a number of papers have appeared presenting CIR observations using …

Formation Conditions of Enceladus and Origin of Its Methane Reservoir

Lunine, J. I.; Waite, J. H.; Magee, B. +5 more

We describe a formation scenario of Enceladus constrained by the deuterium-to-hydrogen ratio (D/H) in the gas plumes as measured by the Cassini Ion and Neutral Mass Spectrometer. We propose that, similarly to Titan, Enceladus formed from icy planetesimals that were partly devolatilized during their migration within the Kronian subnebula. In our sc…

Titan's ionosphere in the magnetosheath: Cassini RPWS results during the T32 flyby

Gurnett, D. A.; Garnier, P.; Krimigis, S. M. +11 more

The Cassini mission has provided much information about the Titan environment, with numerous low altitude encounters with the moon being always inside the magnetosphere. The only encounter taking place outside the magnetopause, in the magnetosheath, occurred the 13 June 2007 (T32 flyby). This paper is dedicated to the analysis of the Radio and Pla…

On the metal abundances inside mixed-morphology supernova remnants: the case of IC 443  and G166.0+4.3

Troja, E.; Miceli, M.; Bocchino, F.

Context: Recent developments in the study of mixed morphology supernova remnants (MMSNRs) have revealed the presence of metal-rich X-ray emitting plasma inside a fraction of these remnants, a feature not properly addressed by traditional models for these objects.
Aims: Radial profiles of thermodynamical and chemical parameters are needed for a…