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Related papers: Whistler mode waves upstream of Saturn

200 papers

Electron resonant scattering by high-frequency electromagnetic whistler-mode waves has been proposed as a mechanism for solar wind electron scattering and pre-acceleration to energies that enable them to participate in shock drift…

The discovery of large-amplitude narrowband whistler-mode waves at frequencies of tenths of the electron cyclotron frequency in large numbers both inside ~.3 AU and at ~1 AU provides an answer to longstanding questions about scattering and…

Solar and Stellar Astrophysics · Physics 2021-06-30 Cynthia Cattell , Tien Vo

The origins and properties of large amplitude whistler wave packets in the solar wind are still unclear. In this Letter we utilise single spacecraft electric and magnetic field waveform measurements from the ARTEMIS mission to calculate the…

Space Physics · Physics 2016-09-23 D. Stansby , T. S. Horbury , C. H. K. Chen , L. Matteini

We studied the properties and occurrence of narrow band whistler waves and their interaction with strahl electrons observed between 0.17 and 0.26 au during the first encounter of Parker Solar Probe. We observe that occurrence of whistler…

We present STEREO observations within 1500 proton gyroradii of 12 interplanetary shocks, with long-duration burst mode electric field acquisition by S/WAVES enabling observation of the evolution of waves throughout the entire ramp of…

Space Physics · Physics 2020-12-09 Z. A. Cohen , C. A. Cattell , A. W. Breneman , L. Davis , P. Grul , K. Kersten , L. B. Wilson , J. R. Wygant

Normal mode seismology is a promising means of measuring rotation in gas giant interiors, and ring seismology presents a singular opportunity to do so at Saturn. We calculate Saturn's normal modes of oscillation and zonal gravity field,…

Earth and Planetary Astrophysics · Physics 2023-03-30 Christopher R. Mankovich , Janosz W. Dewberry , Jim Fuller

Using the Parker Solar Probe FIELDS bandpass filter data and SWEAP electron data from Encounters 1 through 9, we show statistical properties of narrowband whistlers from ~16 Rs to ~130 Rs, and compare wave occurrence to electron properties…

Nonlinear three dimensional, time dependent, fluid simulations of whistler wave turbulence are performed to investigate role of whistler waves in solar wind plasma turbulence in which characteristic turbulent fluctuations are characterized…

Space Physics · Physics 2009-11-13 Dastgeer Shaikh

We perform the first statistical study of the effects of the interaction of suprathermal electrons with narrow-band whistler mode waves in the solar wind. We show that this interaction does occur and that it is associated with enhanced…

Space Physics · Physics 2017-01-19 P. Kajdic , O. Alexandrova , M. Maksimovic , C. Lacombe , A. N. Fazakerley

Voyager images and Cassini occultation data have previously shown that the behavior of the outer edge of Saturn's massive B ring is determined only in part by a static response to the 2:1 inner Lindblad resonance with Mimas. In Cassini…

Earth and Planetary Astrophysics · Physics 2010-11-11 Joseph N. Spitale , Carolyn C. Porco

Spokes are localized clouds of fine particles that appear over the outer part of Saturn's B ring. Over the course of the Cassini Mission, the Imaging Science Subsystem (ISS) obtained over 20,000 images of the outer B ring, providing the…

Earth and Planetary Astrophysics · Physics 2025-01-22 S. R. Callos , M. M. Hedman , D. P. Hamilton

Normal mode oscillations in Saturn excite density and bending waves in the C Ring, providing a valuable window into the planet's interior. Saturn's fundamental modes (f modes) excite the majority of the observed waves, while…

Earth and Planetary Astrophysics · Physics 2021-12-20 Janosz W. Dewberry , Christopher R. Mankovich , Jim Fuller , Dong Lai , Wenrui Xu

We perform axisymmetric hydrodynamical simulations that describe the nonlinear outcome of the viscous overstability in dense planetary rings. These simulations are particularly relevant for Cassini observations of fine-scale structure in…

Earth and Planetary Astrophysics · Physics 2015-05-19 Henrik N. Latter , Gordon I. Ogilvie

We analyze several thousand Cassini ISS images in order to study the inner edge of the Keeler gap in Saturn's outer A ring. We find strong evidence for an m=32 perturbation with a mean amplitude of radial variation of 4.5 km. Phase analysis…

Earth and Planetary Astrophysics · Physics 2017-09-08 Radwan Tajeddine , Philip D. Nicholson , Matthew S. Tiscareno , Matthew M. Hedman , Joseph A. Burns , Maryame El Moutamid

Saturn's C ring contains multiple structures that appear to be density waves driven by time-variable anomalies in the planet's gravitational field. Semi-empirical extensions of density wave theory enable the observed wave properties to be…

Earth and Planetary Astrophysics · Physics 2022-01-24 M. M. Hedman , P. D. Nicholson , M. El Moutamid , S. Smotherman

Electromagnetic whistler-mode waves are a natural emission in the outer radiation belt and the Earth's magnetotail. The resonant interaction of these waves and energetic electrons are responsible for electron acceleration and losses, thus…

We describe a powerful signal processing method, the continuous wavelet transform, and use it to analyze radial structure in Cassini ISS images of Saturn's rings. Wavelet analysis locally separates signal components in frequency space,…

The 'Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon's Interaction with the Sun' (ARTEMIS) mission provides a unique opportunity to study the structure of interplanetary shocks and the associated generation of plasma…

Space Physics · Physics 2021-06-23 L. Davis , C. A. Cattell , L. B. Wilson , Z. A. Cohen , A. W. Breneman , E. L. M. Hanson

The solar wind upstream of Mars's bow shock can be described in terms of Alfv\'enic turbulence, with an incompressible energy cascade rate of $10^{-17}$ J m$^{-3}$ s$^{-1}$ at magnetohydrodynamics (MHD) scales. The solar wind has more…

Solar and Stellar Astrophysics · Physics 2024-06-26 Norberto Romanelli , Christopher M. Fowler , Gina A. DiBraccio , Jared R. Espley , Jasper S. Halekas

Saturn's rings act as a system of innumerable test particles that are remarkably sensitive to periodic disturbances in the planet's gravitational field. We identify 15 additional density and bending waves in Saturn's C ring driven by the…

Earth and Planetary Astrophysics · Physics 2021-09-15 R. G. French , B. Bridges , M. M. Hedman , P. D. Nicholson , C. Mankovich , C. A. McGhee-French