Publications
403 results found
Edberg NJT, Andrews DJ, Shebanits O, et al., 2013, Extreme densities in Titan's ionosphere during the T85 magnetosheath encounter, GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 2879-2883, ISSN: 0094-8276
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- Citations: 24
Provan G, Cowley SWH, Sandhu J, et al., 2013, Planetary period magnetic field oscillations in Saturn's magnetosphere: Postequinox abrupt nonmonotonic transitions to northern system dominance, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 3243-3264
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- Citations: 58
Branduardi-Raymont G, Ford PG, Hansen KC, et al., 2013, Search for Saturn's X-ray aurorae at the arrival of a solar wind shock, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 2145-2156, ISSN: 2169-9380
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- Citations: 12
Andres N, Gomez DO, Bertucci C, et al., 2013, Saturn's ULF wave foreshock boundary: Cassini observations, PLANETARY AND SPACE SCIENCE, Vol: 79-80, Pages: 64-75, ISSN: 0032-0633
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- Citations: 17
Simon S, van Treeck SC, Wennmacher A, et al., 2013, Structure of Titan's induced magnetosphere under varying background magnetic field conditions: Survey of Cassini magnetometer data from flybys TA-T85, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 1679-1699, ISSN: 2169-9380
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- Citations: 29
Grasset O, Dougherty MK, Coustenis A, et al., 2013, JUpiter ICy moons Explorer (JUICE): An ESA mission to orbit Ganymede and to characterise the Jupiter system, PLANETARY AND SPACE SCIENCE, Vol: 78, Pages: 1-21, ISSN: 0032-0633
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- Citations: 376
Sergis N, Jackman CM, Masters A, et al., 2013, Particle and magnetic field properties of the Saturnian magnetosheath: Presence and upstream escape of hot magnetospheric plasma, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 118, Pages: 1620-1634, ISSN: 2169-9380
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- Citations: 34
Badman SV, Masters A, Hasegawa H, et al., 2013, Bursty magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 40, Pages: 1027-1031, ISSN: 0094-8276
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- Citations: 72
Masters A, Stawarz L, Fujimoto M, et al., 2013, Electron acceleration to relativistic energies at a strong quasi-parallel shock wave, NATURE PHYSICS, Vol: 9, Pages: 164-167, ISSN: 1745-2473
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- Citations: 63
Masters A, Stawarz Ł, Fujimoto M, et al., 2013, Electron acceleration to relativistic energies at a strong quasi-parallel shock wave
Electrons can be accelerated to ultrarelativistic energies at strong (high-Mach number) collisionless shock waves that form when stellar debris rapidly expands after a supernova [4, 2, 19]. Collisionless shock waves also form in the flow of particles from the Sun (the solar wind), and extensive spacecraft observations have established that electron acceleration at these shocks is effectively absent whenever the upstream magnetic field is roughly parallel to the shock surface normal (quasi-parallel conditions) [16, 8, 10, 17, 14]. However, it is unclear whether this magnetic dependence of electron acceleration also applies to the far stronger shocks around young supernova remnants, where local magnetic conditions are poorly understood. Here we present Cassini spacecraft observations of an unusually strong solar system shock wave (Saturn’s bow shock) where significant local electron acceleration has been confirmed under quasi- parallel magnetic conditions for the first time, contradicting the established magnetic dependence of electron acceleration at solar system shocks [16, 8, 10, 17, 14]. Furthermore, the acceleration led to electrons at relativistic energies (∼ MeV), comparable to the highest energies ever attributed to shock-acceleration in the solar wind [16]. These observations suggest that at high-Mach numbers, like those of young supernova remnant shocks, quasi-parallel shocks become considerably more effective electron accelerators. For full details please see: Nature Physics, Volume 9, Issue 3, pp. 164-167.
Garrick-Bethell I, Lin RP, Sanchez H, et al., 2013, Lunar magnetic field measurements with a cubesat, Conference on Sensors and Systems for Space Applications VI, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
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- Citations: 9
Stallard TS, Masters A, Miller S, et al., 2012, Saturn's auroral/polar H<sub>3</sub><SUP>+</SUP> infrared emission: The effect of solar wind compression, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 19
Cao H, Russell CT, Wicht J, et al., 2012, Saturn's high degree magnetic moments: Evidence for a unique planetary dynamo, ICARUS, Vol: 221, Pages: 388-394, ISSN: 0019-1035
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- Citations: 32
Andriopoulou M, Roussos E, Krupp N, et al., 2012, A noon-to-midnight electric field and nightside dynamics in Saturn's inner magnetosphere, using microsignature observations, ICARUS, Vol: 220, Pages: 503-513, ISSN: 0019-1035
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- Citations: 45
Simon S, Kriegel H, Saur J, et al., 2012, Analysis of Cassini magnetic field observations over the poles of Rhea, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 37
Luhmann JG, Ulusen D, Ledvina SA, et al., 2012, Investigating magnetospheric interaction effects on Titan's ionosphere with the Cassini orbiter Ion Neutral Mass Spectrometer, Langmuir Probe and magnetometer observations during targeted flybys, ICARUS, Vol: 219, Pages: 534-555, ISSN: 0019-1035
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- Citations: 14
Lai HR, Wei HY, Russell CT, et al., 2012, Reconnection at the magnetopause of Saturn: Perspective from FTE occurrence and magnetosphere size, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 48
Masters A, Achilleos N, Cutler JC, et al., 2012, Surface waves on Saturn's magnetopause, PLANETARY AND SPACE SCIENCE, Vol: 65, Pages: 109-121, ISSN: 0032-0633
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- Citations: 36
Andrews DJ, Cowley SWH, Dougherty MK, et al., 2012, Planetary period oscillations in Saturn’s magnetosphere: Evolution of magnetic oscillation properties from southern summer to post-equinox, J. Geophys. Res., Vol: 117
Badman SV, Achilleos N, Arridge CS, et al., 2012, Cassini observations of ion and electron beams at Saturn and their relationship to infrared auroral arcs (vol 117, A04220, 2012), JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 2
Masters A, Eastwood JP, Swisdak M, et al., 2012, The importance of plasma β conditions for magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
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- Citations: 96
Lamy L, Prange R, Hansen KC, et al., 2012, Earth-based detection of Uranus' aurorae, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
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- Citations: 47
Lamy L, Prange R, Hansen KC, et al., 2012, Earth-based detection of Uranus' aurorae, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276
Bebesi Z, Krupp N, Szego K, et al., 2012, Analysis of energetic electron drop-outs in the upper atmosphere of Titan during flybys in the dayside magnetosphere of Saturn, ICARUS, Vol: 218, Pages: 1020-1027, ISSN: 0019-1035
Arridge CS, Agnor CB, Andre N, et al., 2012, Uranus Pathfinder: exploring the origins and evolution of Ice Giant planets, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 753-791, ISSN: 0922-6435
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- Citations: 42
Badman SV, Achilleos N, Arridge CS, et al., 2012, Cassini observations of ion and electron beams at Saturn and their relationship to infrared auroral arcs, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 51
Provan G, Andrews DJ, Arridge CS, et al., 2012, Dual periodicities in planetary-period magnetic field oscillations in Saturn's tail, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 117, ISSN: 2169-9380
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- Citations: 71
Ulusen D, Luhmann JG, Ma YJ, et al., 2012, Comparisons of Cassini flybys of the Titan magnetospheric interaction with an MHD model: Evidence for organized behavior at high altitudes, ICARUS, Vol: 217, Pages: 43-54, ISSN: 0019-1035
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- Citations: 8
Arridge CS, André N, McAndrews HJ, et al., 2011, Mapping magnetospheric equatorial regions at Saturn from Cassini prime mission observations, Space Science Reviews, Vol: 164, Pages: 1-83, ISSN: 0038-6308
Saturn's rich magnetospheric environment is unique in the solar system, with a large number of active magnetospheric processes and phenomena. Observations of this environment from the Cassini spacecraft has enabled the study of a magnetospheric system which strongly interacts with other components of the saturnian system: the planet, its rings, numerous satellites (icy moons and Titan) and various dust, neutral and plasma populations. Understanding these regions, their dynamics and equilibria, and how they interact with the rest of the system via the exchange of mass, momentum and energy is important in understanding the system as a whole. Such an understanding represents a challenge to theorists, modellers and observers. Studies of Saturn's magnetosphere based on Cassini data have revealed a system which is highly variable which has made understanding the physics of Saturn's magnetosphere all the more difficult. Cassini's combination of a comprehensive suite of magnetospheric fields and particles instruments with excellent orbital coverage of the saturnian system offers a unique opportunity for an in-depth study of the saturnian plasma and fields environment. In this paper knowledge of Saturn's equatorial magnetosphere will be presented and synthesised into a global picture. Data from the Cassini magnetometer, low-energy plasma spectrometers, energetic particle detectors, radio and plasma wave instrumentation, cosmic dust detectors, and the results of theory and modelling are combined to provide a multi-instrumental identification and characterisation of equatorial magnetospheric regions at Saturn. This work emphasises the physical processes at work in each region and at their boundaries. The result of this study is a map of Saturn's near equatorial magnetosphere, which represents a synthesis of our current understanding at the end of the Cassini Prime Mission of the global configuration of the equatorial magnetosphere. © 2011 Springer Science+Business Media B
Arridge CS, Andre N, Khurana KK, et al., 2011, Periodic motion of Saturn's nightside plasma sheet, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380
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- Citations: 83
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