8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR525 papers
- Observatoire de ParisFR400 papers
- Sorbonne UniversitéFR291 papers
- Université Paris Sciences et LettresFR239 papers
- Université Pierre-et-Marie-CurieFR129 papers
- Observatoire de la Côte d’AzurFR126 papers
- University of GenevaCH125 papers
- Université de LilleFR117 papers
- University of LiègeBE116 papers
- Institut d'Astrophysique de ParisFR110 papers
- Université Paris CitéFR108 papers
- Laboratoire d’études spatiales et d’instrumentation en astrophysiqueFR107 papers
30 papers · 1 filter
Stellar wobble caused by a binary system: Can it really be mistaken as an extra-solar planet?
Maria H. M. Morais, Alexandre C. M. Correia
The traditional method for detecting extra-solar planets relies on measuring a small stellar wobble which is assumed to be caused by a planet orbiting the star. Recently, it was su…
The resonant structure of Jupiter's trojan asteroids-II. What happens for different configurations of the planetary system
Philippe Robutel, Julien Bodossian
In a previous paper, we have found that the resonance structure of the present Jupiter Trojan swarms could be split up into four different families of resonances. Here, in a first…
On the equilibrium rotation of Earth-like extra-solar planets
Alexandre C. M. Correia, Benjamin Levrard, Jacques Laskar
The equilibrium rotation of tidally evolved "Earth-like" extra-solar planets is often assumed to be synchronous with their orbital mean motion. The same assumption persisted for Me…
Injection of Oort Cloud Comets: The Fundamental Role of Stellar Perturbations
H. Rickman, M. Fouchard, Ch. Froeschlé +1
We present Monte Carlo simulations of the dynamical evolution of the Oort cloud over the age of the Solar System, using an initial sample of one million test comets without any clo…
Main Belt Binary Asteroidal Systems With Eccentric Mutual Orbits
F. Marchis, P. Descamps, J. Berthier +5
Using 8m-10m class telescopes and their Adaptive Optics (AO) systems, we conducted a long-term adaptive optics campaign initiated in 2003 focusing on four binary asteroid systems:…
Main Belt Binary Asteroidal Systems With Circular Mutual Orbits
F. Marchis, P. Descamps, M. Baek +5
In 2003, we initiated a long-term adaptive optics campaign to study the orbit of various main-belt asteroidal systems. Here we present a consistent solution for the mutual orbits o…
Chaotic diffusion in the Solar System
Jacques Laskar
A statistical analysis is performed over more than 1001 different integrations of the secular equations of the Solar system over 5 Gyr. With this secular system, the probability of…
Formes d'astéroïdes et formation de satellites : rôle de la réaccumulation gravitationnelle
Jean-François Consigli, Paolo Tanga, Carlo Comito +2
Asteroid shapes and satellites: role of gravitational reaccumulation. Following current evidences, it is widely accepted that many asteroids would be "gravitational aggregates", i.…
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…
Habitable planets around the star Gl 581?
Franck Selsis, J. F. Kasting, B. Levrard +3
Radial velocity surveys are now able to detect terrestrial planets at habitable distance from M-type stars. Recently, two planets with minimum masses below 10 Earth masses were rep…
Near-Infrared Mapping and Physical Properties of the Dwarf-Planet Ceres
Benoit Carry, Christophe Dumas, Marcello Fulchignoni +5
We study the physical characteristics (shape, dimensions, spin axis direction, albedo maps, mineralogy) of the dwarf-planet Ceres based on high-angular resolution near-infrared obs…
A proof that tidal heating in a synchronous rotation is always larger than in an asymptotic nonsynchronous rotation state
Benjamin Levrard
In a recent paper, Wisdom (2007, Icarus, in press) derived concise expressions for the rate of tidal dissipation in a synchronously rotating body for arbitrary orbital eccentricity…
New determination of the size and bulk density of the binary asteroid 22 Kalliope from observations of mutual eclipses
P. Descamps, F. Marchis, J. Pollock +16
In 2007, the M-type binary asteroid 22 Kalliope reached one of its annual equinoxes. As a consequence, the orbit plane of its small moon, Linus, was aligned closely to the Sun's li…
Angular Momemtum of Binary Asteroids: Implication for their possible origin
Pascal Descamps, Franck Marchis
We describe in this work a thorough study of the physical and orbital characteristics of extensively observed main-belt and Trojan binaries, mainly taken from the LAOSA (Large Adap…
Titan's rotational state : The effects of a forced "free" resonant wobble
B. Noyelles
In Noyelles et al. (2008, Astron. Astrophys., 478, 959-970), a resonance involving the wobble of Titan is hinted. This paper studies this scenario and its consequences. The first s…
The Physics of Bodily Tides in Terrestrial Planets, and the Appropriate Scales of Dynamical Evolution
Michael Efroimsky, Valery Lainey
Any model of tides is based on a specific hypothesis of how lagging depends on the tidal-flexure frequency. For example, Gerstenkorn (1955), MacDonald (1964), and Kaula (1964) assu…
An extrasolar planetary system with three Neptune-mass planets
C. Lovis, M. Mayor, F. Pepe +11
Over the past two years, the search for low-mass extrasolar planets has led to the detection of seven so-called 'hot Neptunes' or 'super-Earths' around Sun-like stars. These planet…
Planning Near Earth Asteroid Observations on a 1m Class Telescope
Ovidiu Vaduvescu, Mirel Birlan
The number of known Near Earth Asteroids (NEAs) and Potentially Hazardous Asteroids (PHAs) has continued to grow in the last decade. Follow-up and recovery of newly discovered obje…
Tidal dissipation within hot Jupiters: a new appraisal
Benjamin Levrard, Alexandre Morgado Correia, Gilles Chabrier +3
Eccentricity or obliquity tides have been proposed as the missing energy source that may explain the anomalously large radius of some transiting ``hot Jupiters''. To maintain a non…
Biomarkers in disk-averaged near-UV to near-IR Earth spectra using Earthshine observations
Slim Hamdani, Luc Arnold, C. Foellmi +6
We analyse the detectability of vegetation on a global scale on Earth's surface. Considering its specific reflectance spectrum showing a sharp edge around 700 nm, vegetation can be…
The HARPS search for southern extra-solar planets. IX. mu Ara, a system with four planets
F. Pepe, A. C. M. Correia, M. Mayor +13
The mu Ara planetary system is rather complex: It contains two already known planets, mu Ara b with P=640 days and mu Ara c with P=9.64 days, and a third companion on a wide but st…
Long-term evolution of orbits about a precessing oblate planet. 3. A semianalytical and a purely numerical approach
Pini Gurfil, Valery Lainey, Michael Efroimsky
Construction of a theory of orbits about a precessing oblate planet, in terms of osculating elements defined in a frame of the equator of date, was started in Efroimsky and Goldrei…
A low density of 0.8 g/cc for the Trojan binary asteroid 617 Patroclus
Franck Marchis, Daniel Hestroffer, Pascal Descamps +15
The Trojan population consists of two swarms of asteroids following the same orbit as Jupiter and located at the L4 and L5 Lagrange points of the Jupiter-Sun system (leading and fo…
Near-UV to near-IR disk-averaged Earth's reflectance spectra
S. Hamdani, L. Arnold, C. Foellmi +5
We report 320 to 1020nm disk-averaged Earth reflectance spectra obtained from Moon's Earthshine observations with the EMMI spectrograph on the NTT at ESO La Silla (Chile). The spec…