A5051398608- Astro and Planetary Science
- Planetary Science and Exploration
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Space Exploration and Technology
- Stellar, planetary, and galactic studies
- Space Satellite Systems and Control
- Laser-Plasma Interactions and Diagnostics
- Geomagnetism and Paleomagnetism Studies
- Gamma-ray bursts and supernovae
- Pulsed Power Technology Applications
Laboratoire d’Astrophysique de Marseille
2023-2025
Château Gombert
2024
Aix-Marseille Université
2022-2024
Centre National de la Recherche Scientifique
2022-2023
In the vast array of Jovian auroral radio emissions, broadband kilometric (bKOM) component (10-300 kHz) has received comparatively less research attention. Utilizing Juno in situ measurements within regions, a survey Juno/Waves observations over first 60 orbits was conducted to identify seven bKOM source candidates. These candidates were predominantly detected during dawn storm episodes (four out seven) and three found be colocated with cavities. A subsequent growth rate analysis, employing...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD 88986 b, potentially transiting sub-Neptune, possessing longest period known small (<4 R ⊕ ) precise mass measurement ( σ M /M > 25%). Additionally, identified presence massive companion in wider orbit...
The dynamics of the Jovian magnetosphere is controlled by interplay planet's fast rotation, its solar-wind interaction and main plasma source at Io torus, mediated coupling processes involving magnetosphere, ionosphere, thermosphere. At ionospheric level, these can be characterized a set parameters including conductances, field-aligned currents, horizontal electric fields, transport charged particles along field lines fluxes electrons precipitating into upper atmosphere which trigger auroral...
Abstract At Jupiter, part of the auroral radio emissions are induced by Galilean moons Io, Europa and Ganymede. Until now, except for Ganymede, they have been only remotely detected, using ground–based radio–telescopes or electric antennas aboard spacecraft. The polar trajectory Juno orbiter allows spacecraft to cross range magnetic flux tubes which sustain various Jupiter–satellite interactions, in turn sample situ associated emission regions. In this study, we focus on detection...
Abstract In this study, we statistically analyze the Jovian auroral radio sources detected in situ by Juno/Waves at frequencies f below electron cyclotron frequency ce . We first conduct a survey of data over 1–40 MHz from 2016 to 2022. The 15 HectOMetric (HOM) all lie within 1–5 and are both less frequent than commonly observed slightly above clustered southern hemisphere, ∼90–270° longitudes. these emission regions with growth rate analysis framework Cyclotron Maser Instability (CMI),...
Jupiter is the planet with most intense and extensive radio radiation in our solar system. The spectrum composed of no less than half a dozen components, from low-frequency emissions, such as quasi-periodic bursts (QP) or trapped continuum (from few kHz to tens kHz), high-frequency emissions produced over poles, ranging MHz 40 MHz. Since July 2016, Juno has been orbiting Jupiter, performing polar orbit every 53 days during its prime mission, sampling all latitudes, longitudes local times....
At Jupiter, part of the auroral radio emissions are induced by Galilean moons Io, Europa and Ganymede. Until now, except for Ganymede, they have been only remotely detected, using ground-based radio-telescopes or electric antennas aboard spacecraft. The polar trajectory Juno orbiter allows spacecraft to cross range magnetic flux tubes which sustain various Jupiter-satellite interactions, in turn sample situ associated emission regions. In this study, we focus on detection characterization...
At Jupiter, part of the auroral radio emissions are induced by Galilean moons Io, Europa and Ganymede. Until now, except for Ganymede, they have been only remotely detected, using ground-based radio-telescopes or electric antennas aboard spacecraft. The polar trajectory Juno orbiter allows spacecraft to cross range magnetic flux tubes which sustain various Jupiter-satellite interactions, in turn sample situ associated emission regions. In this study, we focus on detection characterization...
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ discovered so far. The lack of discoveries this population poses a challenge to research into planetary demographics, formation, and evolution. Here, we present detection characterization HD88986b, potentially transiting sub-Neptune, possessing longest period known small (< 4 R$_{\oplus}$) precise mass measurement ($\sigma_M/M$ > 25%). Additionally, identified presence massive companion in wider orbit...