Results 71 to 80 of about 3,615 (185)

Modeling the Enceladus plume--plasma interaction [PDF]

, 2010
We investigate the chemical interaction between Saturn's corotating plasma and Enceladus' volcanic plumes. We evolve plasma as it passes through a prescribed H2O plume using a physical chemistry model adapted for water-group reactions. The flow field is assumed to be that of a plasma around an electrically-conducting obstacle centered on Enceladus and ...
arxiv   +1 more source

A Method for Calculating Attenuation in Creeping Materials

Earth and Space Science, Volume 12, Issue 2, February 2025.
Abstract The phase lag between an applied forcing and a response to that forcing is a fundamental parameter in geophysical signal processing. For solid deforming materials, the phase lag between an oscillatory applied stress and the resulting strain response encapsulates information about the dynamical behavior of materials.
Ron Maor, Nir Z. Badt, Hugo N. Ulloa, David L. Goldsby   +3 more
wiley   +1 more source

Origin of the excess of high-energy retrograde stars in the Galactic halo [PDF]

, 2019
We report on the very low $\alpha$-element abundances of a group of metal-poor stars with high orbital energy and with large retrograde motion in the Milky Way halo, whose excess has been reported recently from metallicity and kinematics. We constructed a sample of halo stars with measured abundances and precise kinematics, including $\sim 880$ stars ...
arxiv   +1 more source

Shallow Subsurface Water at the Base of Europa's Double Ridges

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract Recent numerical modeling and the detection of an Earth analog advanced our understanding of the formation mechanisms behind Europa's distinctive double ridges. Notably, a recent contribution by Cashion et al. (2024, https://doi.org/10.1029/2023je008007), demonstrated that ice wedging as a primary formation mechanism can accurately reproduce ...
G. Steinbrügge, G. Patterson
wiley   +1 more source

Analysis of Enceladus’s Time-variable Space Environment to Magnetically Sound its Interior

The Planetary Science Journal
We provide a comprehensive study of Enceladus’s time-variable magnetic field environment and identify in measurements of the Cassini spacecraft signatures that appear to be consistent with induced fields from the moon’s interior.
Joachim Saur, Stefan Duling, Alexander Grayver, Jamey R. Szalay   +3 more
doaj   +1 more source

Quasi‐Periodic Emissions in Saturn's Magnetosphere and Their Effects on Electrons

Geophysical Research Letters, Volume 52, Issue 1, 16 January 2025.
Abstract Investigations into quasiperiodic (QP) whistler mode emissions within Saturn's magnetosphere have uncovered distinctive characteristics of these emissions, which display a nearly periodic rising tone structure in the wave spectrogram, characterized by modulation periods of several minutes. These QP emissions are predominantly observed at low L‐
S. Teng, Dedong Wang, Alexander Y. Drozdov, Yuri Y. Shprits, Zeyin Wu, Y. X. Hao, Z. Yao, J. Zhang   +7 more
wiley   +1 more source

Curtain-based Maps of Eruptive Activity in Enceladus’s South-polar Terrain at 15 Cassini Epochs

The Planetary Science Journal
We map surface eruptive activity in Cassini images of Enceladus’s south-polar terrain (SPT) at 15 epochs spanning late 2009 to late 2015 using a refined curtain approach derived from that of J. N. Spitale et al. (S2015).
Joseph N. Spitale, Mattie D. Tigges, Alexander Berne, Alyssa Rhoden, Terry A. Hurford, Kevin D. Webster   +5 more
doaj   +1 more source

Pick‐Up ion Distributions in the Inner and Middle Saturnian Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract Based on the entire dataset collected by the Cassini Plasma Spectrometer, we provide a comprehensive picture of the pitch angle (PA) and velocity distributions of pick‐up ions (PUIs) in Saturn's inner and middle magnetosphere. We investigate the dependence of these distributions on Saturnian Local Time and magnetic latitude. We also search for
Cristian R. Radulescu, Andrew J. Coates, Sven Simon, Daniel Verscharen, Geraint H. Jones   +4 more
wiley   +1 more source

A Durable Electron Density Profile Near the Inner Edge of the Io Torus

Journal of Geophysical Research: Space Physics, Volume 130, Issue 1, January 2025.
Abstract The Juno Waves instrument can be used to accurately determine the electron density inside Io's orbit, the inner Io torus. These observations have revealed a local peak in the electron density just inside M = 5 and at centrifugal latitudes above about 10° ${}^{\circ}$ that is likely the ’cold torus' as identified in Earth‐based observations of ...
W. S. Kurth, G. B. Hospodarsky, J. B. Faden, J. D. Menietti, A. H. Sulaiman, S. S. Elliott, F. Bagenal, E. G. Nerney, J. E. P. Connerney, F. Allegrini, S. J. Bolton   +10 more
wiley   +1 more source

Seasonal and radial trends in Saturn's thermal plasma between the main rings and enceladus [PDF]

, 2013
A goal of Cassini's extended mission has been to examine the seasonal variations of Saturn's magnetosphere, moons, and rings. Recently we showed that the magnetospheric plasma between the main rings and Enceladus exhibited a time dependence that we attributed to a seasonally variable source of oxygen from the main rings (Elrod et al., 2012).
arxiv   +1 more source