A5023509652- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Solar and Space Plasma Dynamics
- Space Satellite Systems and Control
- Space Exploration and Technology
- Ionosphere and magnetosphere dynamics
- Gamma-ray bursts and supernovae
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
- Advanced Photonic Communication Systems
- Spacecraft and Cryogenic Technologies
- History of Computing Technologies
- Geomagnetism and Paleomagnetism Studies
- Astronomical Observations and Instrumentation
- Space Science and Extraterrestrial Life
- GNSS positioning and interference
- Geological and Geochemical Analysis
- Astrophysics and Star Formation Studies
- Atmospheric Ozone and Climate
- Satellite Image Processing and Photogrammetry
- Earthquake Detection and Analysis
- Astrophysics and Cosmic Phenomena
- Spacecraft Design and Technology
Institut de Mécanique Céleste et de Calcul des Éphémérides
2015-2024
Roche (France)
2012-2024
Université Paris Sciences et Lettres
2017-2024
Centre National de la Recherche Scientifique
2014-2024
Sorbonne Université
2017-2024
Observatoire de Paris
2011-2024
Université de Lille
2017-2024
Espace pour la vie
2024
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2017
Physiologie Environnement et Génétique pour l'Animal et les Systèmes d'Elevage
2015-2016
Context . The source regions of ordinary chondrites (~80% all falls) and large S-type near-Earth objects (NEOs; ~30%) have recently been identified with three young asteroid families (Karin, Koronis, Massalia) being at the origin most chondrite falls. Aims present work is a continuation our previous studies aims to determine remaining meteorite NEO classes, an emphasis on carbonaceous (CM, CI, CO, CV, CK, CR, CH, CB, or C-ungrouped). Methods We studied 38 individual families, including old...
Observations of meteor showers allow us to constrain several cometary parameter and retrieve useful parameters on dust grains, for instance the size distribution index s. In this first paper, we describe a new model compute time level shower whose parent body is known periodic comet. The aim our work was use all available knowledge avoid most "a priori" hypotheses previous meteoroid stream models. ejection velocity based hydrodynamic model. Because large amount particles released by comet,...
Abstract Three different types of rocks were tested in a high enthalpy air plasma flow. Two terrestrial rocks, basalt and argillite, an ordinary chondrite, with 10 mm diameter cylindrical shape order to observe decomposition, potential fragmentation, spectral signature. The goal was simulate meteoroid ablation interpret meteor observation compare these observations ground based measurements. test flow local mass-specific 70 MJ kg −1 results surface heat flux at the meteorite fragment...
Context . Orbital similarity measures, such as the D values, have been extensively used in meteor science to identify meteoroid streams and associate meteorite falls with near-Earth objects (NEOs). However, chaotic nature of space challenges long-term reliability these measures for stream identification, increasing size our fireball, fall, NEO databases make random associations more common. Despite this, many researchers erroneously continue use orbital beyond its inherent limits. Aims We...
As of today, there is no official definition a meteor cluster. It usually identified as large number meteors sharing similar radiant and velocity, all occurring within few seconds. Only eight clusters have been reported so far, from single-camera or camera network observations. However, cluster may be observed by several distant networks remain unnoticed simply because each recording small portion the We aim to provide an overview help define what constitutes potentially adding more already...
Strange-looking dust cloud around asteroid (596) Scheila was discovered on 2010 December 11.44-11.47. Unlike normal cometary tails, it consisted of three tails and faded within two months. We constructed a model to reproduce the morphology based laboratory measurement high velocity impacts dynamics. As result, we succeeded in reproduction peculiar by an impact-driven ejecta plume consisting impact cone downrange plume. Assuming angle 45 deg, our suggests that decameter-sized collided with...
Abstract– This article explores what the recovery of 2008 TC 3 in form Almahata Sitta meteorites may tell us about source region ureilites main asteroid belt. An investigation is made into known asteroids with roughly same spectroscopic signature as . A population low‐inclination near‐Earth identified spectra similar to Five families Main Belt, well a ungrouped scattered inner and central belts, are possible regions for this Three ruled out on dynamical grounds. New near‐infrared 142 Polana...
NenuFAR is both a giant extension of the LOFAR and large standalone instrument in low-frequency range (10–85 MHz). It was designed Nançay with national international collaboration. Antenna radiators were modeled on LWA antenna design whereas preamplifiers France. Antennas will be distributed 96 mini-arrays 19 dual-polarized elements, densely covering disk 400 m diameter. A few are expected to lie at distances 2–3 km. silent control-command system designed, computer dialog defined. Receivers...
Abstract A new 1.5 m diameter impact crater was discovered on Mars only ~40 km from the InSight lander. Context camera images constrained its formation between 21 February and 6 April 2019; follow‐up High Resolution Imaging Science Experiment resolved crater. During this time period, three seismic events were identified in data. We derive expected signal characteristics use them to evaluate each of events. However, none can definitively be associated with source. Atmospheric perturbations...
ABSTRACT Two meteorite pieces have been recovered in Italy, near the town of Cavezzo (Modena), on 2020 January 4th. The associated fireball was observed evening New Year’s Day by eight all-sky cameras PRISMA network, a partner FRIPON. computed trajectory had an inclination angle approximately 68° and velocity at infinity 12.8 km s−1. Together with relatively low terminal height, estimated as 21.5 km, those values were indicating significant possibility dropping event, additionally confirmed...
Context . The determination of meteor shower or parent body associations is inherently a statistical problem. Traditional methods, primarily the similarity discriminants, have limitations, particularly in handling increasing volume and complexity meteoroid orbit data. Aims We introduce new more statistically robust generalizable method for estimating false positive detections identification, leveraging kernel density estimation (KDE). applied to fireball data from European Fireball Network,...
Context . Jupiter-family comets (JFCs), which originate from the Kuiper belt and scattered disk, exhibit low-inclination chaotic trajectories due to close encounters with Jupiter. Despite their typically short incursions into inner solar system, a notable number of them are on Earth-crossing orbits, fireball networks detecting many objects “JFC-like” (2 < T J 3) orbits. Aims This investigation aims examine orbital dynamics JFCs comet-like fireballs over 10 4 yr timescales, focusing...
Abstract— On September 15th, 2007, around 11:45 local time in Peru, near the Bolivian border, atmospheric entry of a meteoroid produced bright lights sky and intense detonations. Soon after, crater was discovered south Lake Titicaca. These events have been detected by seismic network two infrasound arrays operating for Comprehensive Nuclear‐Test‐Ban Treaty Organization, situated at about 80 1620 km from crater. The localization origin computed with records are consistent reported impact....
Lunar impact flashes have been monitored over the last 20 years for determining mass frequency distribution of near-Earth objects in cm-dm size range. In this work, using telescopic observations R and I band from NELIOTA database, flash temperatures are derived. They found to range between approximately 1,300 5,800 K. addition, it is also that temperature values appear a significantly broader than Gaussian function, therefore making difficult estimate luminous energy by assigning an average...
Determining the source regions of meteorites is one major goals current research in planetary science. Whereas asteroid observations are currently unable to pinpoint most meteorite classes, meteors with camera networks and subsequent recovery may help make progress on this question. The main caveat such an approach, however, that rate falls low, implying meteoritic analogues at least 80% observed remain unknown. Aims: Spectroscopic bolides have potential mitigate problem by classifying...
Context. Here we describe a new model of the dust streams comet 67P/Churyumov-Gerasimenko that has been developed using Interplanetary Meteoroid Environment for Exploration (IMEX). This is universal recently created cometary meteoroid in inner solar system.
Context. The interplanetary dust complex is currently understood to be largely the result of production from Jupiter-family comets, with contributions also longer-period comets (Halley- and Oort-type) collisionally produced asteroidal dust. Aims. Here we develop a dynamical model cloud these source populations in order risk hazard assessment tool for meteoroids inner solar system. Methods. long-duration (1 Myr) integrations grains Halley-type main belt asteroids were used generate simulated...
In meteor physics the luminous efficiency ${\tau}$ is used to convert meteor's magnitude corresponding meteoroid's mass. However, lack of sufficiently accurate verification methods or adequate laboratory tests leave this parameter be controversially discussed. work meteor/fireball data obtained by Fireball Recovery and InterPlanetary Observation Network (FRIPON) was calculate masses pre-atmospheric meteoroids which could in turn compared brightnesses assess their efficiencies. For that,...