Results 21 to 30 of about 3,808 (204)

Drifting discrete Jovian radio bursts reveal acceleration processes related to Ganymede and the main aurora. [PDF]

Nat Commun, 2023
Radio detection at high time-frequency resolutions is a powerful means of remotely studying electron acceleration processes. Radio bursts have characteristics (polarization, drift, periodicity) making them easier to detect than slowly variable emissions.
Mauduit E, Zarka P, Lamy L, Hess SLG.
europepmc   +2 more sources

Characterization of the Surfaces and Near-Surface Atmospheres of Ganymede, Europa and Callisto by JUICE. [PDF]

Space Sci Rev
We present the state of the art on the study of surfaces and tenuous atmospheres of the icy Galilean satellites Ganymede, Europa and Callisto, from past and ongoing space exploration conducted with several spacecraft to recent telescopic observations ...
Tosi F, Roatsch T, Galli A, Hauber E, Lucchetti A, Molyneux P, Stephan K, Achilleos N, Bovolo F, Carter J, Cavalié T, Cimò G, D'Aversa E, Gwinner K, Hartogh P, Huybrighs H, Langevin Y, Lellouch E, Migliorini A, Palumbo P, Piccioni G, Plaut JJ, Postberg F, Poulet F, Retherford K, Rezac L, Roth L, Solomonidou A, Tobie G, Tortora P, Tubiana C, Wagner R, Wirström E, Wurz P, Zambon F, Zannoni M, Barabash S, Bruzzone L, Dougherty M, Gladstone R, Gurvits LI, Hussmann H, Iess L, Wahlund JE, Witasse O, Vallat C, Lorente R.   +46 more
europepmc   +2 more sources

Composition and thermal properties of Ganymede's surface from JWST/NIRSpec and MIRI observations [PDF]

Astronomy & Astrophysics, 2023
JWST NIRSpec IFU (2.9-5.3 mu) and MIRI MRS (4.9-28.5 mu) observations were performed on both the leading and trailing hemispheres of Ganymede with a spectral resolution of ~2700. Reflectance spectra show signatures of water ice, CO2 and H2O2.
D. Bockelée-Morvan, E. Lellouch, O. Poch, E. Quirico, S. Cazaux, I. Pater, T. Fouchet, P. Fry, P. Rodríguez‐Ovalle, F. Tosi, M. H. Wong, I. Boshuizen, K. Kleer, L. N. Fletcher, L. Meunier, A. Mura, L. Roth, J. Saur, B. Schmitt, S. Trumbo, M. Brown, J. O’Donoghue, G. Orton, M. Showalter   +23 more
semanticscholar   +1 more source

The Optical Aurorae of Europa, Ganymede, and Callisto [PDF]

The Planetary Science Journal, 2023
The tenuous atmospheres of the Galilean satellites are sourced from their surfaces and produced by a combination of plasma-surface interactions and thermal processes. Even though they are thin, these atmospheres can be studied via their auroral emissions,
K. de Kleer, Z. Milby, C. Schmidt, M. Camarca, M. Brown   +4 more
semanticscholar   +1 more source

The Io, Europa, and Ganymede Auroral Footprints at Jupiter in the Ultraviolet: Positions and Equatorial Lead Angles [PDF]

Journal of Geophysical Research: Space Physics, 2023
Jupiter's satellite auroral footprints are a consequence of the interaction between the Jovian magnetic field with co‐rotating iogenic plasma and the Galilean moons.
V. Hue, Randy Gladstone, Corentin K. Louis, T. Greathouse, B. Bonfond, J. Szalay, A. Moirano, R. Giles, J. Kammer, M. Imai, Alessandro Mura, M. Versteeg, G. Clark, Jean-Claude G'erard, D. Grodent, J. Rabia, Ali H. Sulaiman, S. Bolton, J. Connerney   +18 more
semanticscholar   +1 more source

Source of Radio Emissions Induced by the Galilean Moons Io, Europa and Ganymede: In Situ Measurements by Juno [PDF]

Journal of Geophysical Research: Space Physics, 2023
At Jupiter, part of the auroral radio emissions are induced by the 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 ...
C. Louis, P. Louarn, B. Collet, N. Cl'ement, S. A. Saati, J. Szalay, V. Hue, L. Lamy, S. Kotsiaros, W. Kurth, C. Jackman, Y. Wang, M. Blanc, F. Allegrini, J. Connerney, D. Gershman   +15 more
semanticscholar   +1 more source

Ion Dynamics at the Magnetopause of Ganymede. [PDF]

J Geophys Res Space Phys, 2022
We study the dynamics of the thermal O+ and H+ ions at Ganymede's magnetopause when Ganymede is inside and outside of the Jovian plasma sheet using a three‐dimensional hybrid model of plasma (kinetic ions, fluid electrons).
Fatemi S, Poppe AR, Vorburger A, Lindkvist J, Hamrin M.   +4 more
europepmc   +2 more sources

On the stability of Laplace resonance for Galilean moons (Io, Europa, Ganymede)

Anais da Academia Brasileira de Ciências, 2021
This paper presents the application of recent ansatz for estimation of stability of the Laplace resonance for Galilean moons (Io, Europa, Ganymede). We estimate over time the eccentricity + semi–major axis in a binary system experiencing the net tidal ...
SERGEY ERSHKOV, DMYTRO LESHCHENKO
doaj   +1 more source

Ganymede MHD Model: Magnetospheric Context for Juno's PJ34 Flyby [PDF]

Geophysical Research Letters, 2022
On 7 June 2021 the Juno spacecraft visited Ganymede and provided the first in situ observations since Galileo's last flyby in 2000. The measurements obtained along a one‐dimensional trajectory can be brought into global context with the help of three ...
S. Duling, J. Saur, G. Clark, F. Allegrini, T. Greathouse, R. Gladstone, W. Kurth, J. Connerney, F. Bagenal, A. Sulaiman   +9 more
semanticscholar   +1 more source

Ganymede's UV Reflectance From Juno‐UVS Data

Geophysical Research Letters, 2022
During the Juno orbit 34 Ganymede encounter, the ultraviolet spectrograph mapped UV sunlight reflected by Ganymede from a closest approach altitude of 1,044 km, allowing us to study spatial variations in Ganymede's far ultraviolet reflectance at higher ...
P. M. Molyneux, T. K. Greathouse, G. R. Gladstone, M. H. Versteeg, V. Hue, J. Kammer, M. W. Davis, S. J. Bolton, R. Giles, J. E. P. Connerney, J. C. Gérard, D. C. Grodent   +11 more
doaj   +1 more source