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40 papers · 2 filters
A2163: Merger events in the hottest Abell galaxy cluster I. Dynamical analysis from optical data
S. Maurogordato, A. Cappi, C. Ferrari +7
We present a detailed optical analysis of the galaxy cluster A2163 based on new multicolor wide field imaging and medium-to-high resolution (R~2000) spectroscopy. While X-ray obser…
Asteroseismology of Procyon with SOPHIE
B. Mosser, F. Bouchy, M. Martic
This paper reports a 9-night asteroseismic observation program conducted in January 2007 with the new spectrometer Sophie at the OHP 193-cm telescope, on the F5 IV-V target Procyon…
Gaia: Organisation and challenges for the data processing
F. Mignard, C. Bailer-Jones, U. Bastian +9
Gaia is an ambitious space astrometry mission of ESA with a main objective to map the sky in astrometry and photometry down to a magnitude 20 by the end of the next decade. While t…
Origin of the Structure of the Kuiper Belt during a Dynamical Instability in the Orbits of Uranus and Neptune
Harold F. Levison, Alessandro Morbidelli, Christa Van Laerhoven +2
We explore the origin and orbital evolution of the Kuiper belt in the framework of a recent model of the dynamical evolution of the giant planets, sometimes known as the Nice model…
Anisotropic turbulent model for solar coronal heating
B. Bigot, S. Galtier, H. Politano
Context : We present a self-consistent model of solar coronal heating, originally developed by Heyvaert & Priest (1992), in which we include the dynamical effect of the background…
Titan's rotation: A 3-dimensional theory
B. Noyelles, A. Lemaitre, A. Vienne
We study the forced rotation of Titan seen as a rigid body at the equilibrium Cassini state, involving the spin-orbit synchronization. We used both the analytical and the numerical…