PEGASE
Planetology and
Environments from
Ground
Astrometry and
Space
Exploration
Presentation
The PEGASE team is composed of astronomers, professors, PhD students and postdoctorates working on the problematics related to the dynamics of the solar system objects, from the terrestrial environment to the Trans-Neptunian objects. PEGASE brings together astronomical observers, celestial mechanics theorists, specialists in numerical modeling, experts in the dynamics of natural satellites, artificial satellites, space debris, asteroids, meteors and planet formation.
Research activities
Our problematics
- Dynamical plantetology
- Tidal effects (coord. by V. Lainey)
- Asteroids and Yarkovsky effect (coord. by D. Hestroffer)
- Planet and satellite formation (coord. by K. Baillié & V. Lainey)
- Planetary rings and small satellites (coord. by S. Renner)
- Natural satellites observations (coord. by V. Robert & J.-E. Arlot)
- Asteroids and Gaia (coord. by W. Thuillot)
- Comets and Trans-Neptunian Objects (coord. by M. Fouchard)
- Meteoroids and meteors (coord. by J. Vaubaillon)
- NAROO (New Astrometric Reduction of Old Observations) (coord. by V. Robert)
- Terrestrial environment: artificial satellites and space debris (coord. by F. Deleflie)
- Analytical planetary theories (coord. J.-L. Simon)
Resources
- Numerical modeling : N-Body codes, hydrodynamical codes, statistical approaches, frequency analysis, analytical developments, perturbation methods
- Ground observations : Gaia-FUN-SSO network, NAROO, Mutual Phenomenons, Meteor networks, OHP, Subaru
- Airborne based observations : 2007 Aurigids, 2008 Quadrantids, 2008 ATV reentry, 2011 Draconids
- Space observations : CASSINI, Gaia, HST, JWS, JUICE, Mars Express, PLATO, Spitzer...
- Objects of interest : Asteroids, natural satellites, planets and rings, comets, NEO, artificial satellites, space debris, exoplanetary systems
The team
- Jean-Eudes Arlot
- Kévin Baillié (postdoctorate)
- Hongru Chen (postdoctorate)
- Florent Deleflie
- Yann Duchemin (PhD student)
- Marc Fouchard
- Daniel Hestroffer
- Valéry Lainey
- William Polycarpe (PhD student)
- Stéfan Renner
- Vincent Robert
- Ali Sammuneh (postdoctorate)
- Federica Spoto (postdoctorate)
- Delphine Thomasson (PhD student)
- William Thuillot
- Jérémie Vaubaillon (team leader)
- Alain Vienne (co-team leader)
- Xiaojin Xi (PhD student)
Affiliated
- Nicholas Cooper (Queen Mary University London)
- David Coulot (IGN)
- Pedro David (IMCCE)
- Nikolai Emelyanov (SAI Lomonosov Moscou)
- Benoît Noyelles (Université de Namur)
- Jean-Louis Simon (IMCCE)
- Radu Stoica (Université de Lorraine)
- Nicolas Thouvenin (IMCCE)
- Roberto Vieira Martins (Observatoire National, Rio de Janeiro)
Former PhD students and postdoctorates
- Nilton Araújo (UNESP, Guaratingueta, Sao Paulo) : "Um estudo de objetos perturbados e capturados pela ressonância de corrotação e Lindblad" / "A study of objects disturbed and captured by corotation and Lindblad resonance" (PhD def. 07/07/2017)
- Jérôme Daquin : "Essais sur le mouvement résonant à long terme des débris spatiaux" (PhD def. 12/10/2015)
- Josselin Desmars (Observatoire de Paris, LESIA)
- Siegfied Eggl (JPL/NASA, Pasadena)
- Fatoumata Kébé: "Etude de l’influence des incréments de vitesse impulsionnels sur les trajectoires de débris spatiaux" (PhD def. 12/06/2016)
- Irina Kovalenko (IKI, Moscou): "Caractérisation orbitale et physique des astéroïdes binaires" (PhD def. 09/28/2016)
- Maria Kudryashova
- Shanna Li: "A new reduction of the old observations of Phoebe and the orbit update" (PhD def. 09/23/2016)
- Bruno Morgado (Observatório Nacional do Brasil)
- Altair Ramos Gomes (Observatório Nacional do Brasil)
- Melaine Saillenfest (IMCCE - ASD): "Théories séculaires et dynamique orbitale au-delà de Neptune" (PhD def. 07/03/2017)
- Éléonore Saquet: "Photométrie et Astrométrie des Satellites de Jupiter : Application à la campagne de phénomènes mutuels 2015" (PhD def. 09/26/2017)
Working groups
Science highlights
- Baillié K., Charnoz S., Pantin E., 2015. Time evolution of snow regions and planet traps in an evolving protoplanetary disk. Astronomy & Astrophysics 577, A65.
- Cooper N.J., Lainey V., Meunier L.-E., Murray C.D., Zhang Q.-F., Baillié K., Evans M.W., Thuillot W., Vienne A., 2018. The Caviar software package for the astrometric reduction of Cassini ISS images: description and examples. Astronomy & Astrophysics 610, A2.
- Lainey V., Jacobson R.A., Tajeddine R., Cooper N.J., Murray C., Robert V., Tobie G., Guillot T., Mathis S., Remus F., and 8 coauthors, 2017. New constraints on Saturn's interior from Cassini astrometric data. Icarus, 281, 286.
- Renner S., Cooper N.J., El Moutamid M., Sicardy B., Vienne A., Murray C.D., Saillenfest M., 2016. Origin of the Chaotic Motion of the Saturnian Satellite Atlas. Astronomical Journal, 151.
- Robert V., Pascu D., Lainey V., Arlot J.-E., De Cuyper J.-P., Dehant V., Thuillot W., 2016. New astrometric measurement and reduction of USNO photographic observations of the main Saturnian satellites: 1974-1998. Astronomy & Astrophysics, 596.
- Saillenfest M., Fouchard M., Tommei G., Valsecchi G.B., 2017. Study and application of the resonant secular dynamics beyond Neptune. Celestial Mechanics and Dynamical Astronomy, 127, 477-504.
- Thuillot W. et al., 2016. CU4-SSO/Gaia-FUN-SSO: A first step to validate the Solar System Objects detection. Technical Note ESA GAIA-C4-TN-IMC-WT-002-02, ESA.
- Gaia Collaboration; Brown, A.G.A., et al., 2016. Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties. Astronomy & Astrophysics, 595, A2.
- Gaia Collaboration; Prusti, T. et al., 2016. The Gaia mission. Astronomy & Astrophysics, 595, A1.
Software and database
- CAVIAR: CAssini Visual Image Analysis Release
- STELA : Semi-analytical Tool for End-of-Life Analysis (CNES)
- DynastVO: Virtual Observatory orbital asteroid database
- NSDB: Natural Satellites DataBase
- Multisat: Natural satellites online ephemerides
Last update Monday 26 February 2018