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Space Physics papers — page 101

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Relativistic Quasilinear Diffusion in Axisymmetric Magnetic Geometry for Arbitrary-Frequency Electromagnetic Fluctuations
A relativistic bounce-averaged quasilinear diffusion equation is derived to describe stochastic particle transport associated with arbitrary-frequency electromagnetic fluctuations in a nonuniform…
Alain J. Brizard, Anthony A. ChanMar 22, 2004
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Isolated Electrostatic Structures Observed Throughout the Cluster Orbit: Relationship to Magnetic Field Strength
Isolated electrostatic structures are observed throughout much of the 4 Re by 19.6 Re Cluster orbit. These structures are observed in the Wideband plasma wave instrument's waveform data as…
J. S. Pickett, L. -J. Chen, S. W. Kahler et al.Feb 25, 2004
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Electron-acoustic plasma waves: oblique modulation and envelope solitons
Theoretical and numerical studies are presented of the amplitude modulation of electron-acoustic waves (EAWs) propagating in space plasmas whose constituents are inertial cold electrons, Boltzmann…
I. Kourakis, P. K. ShuklaFeb 11, 2004
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Gravitational Interactions Between Protoplanets and Planetismal Disks of Equal Mass
Numerical simulations show that planetesimal systems with unevenly distributed masses may actually be more stable than those where all the bodies are of roughly equal size.
B. D. Lindsay, K. W. Orr, T. W. Hyde et al.Jan 29, 2004
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Orbits of Dust Ejecta From Ceres
The question of whether asteroid ejecta can enter stable orbits about the parent body is examined.
R. C. Nazzario, T. W. HydeJan 28, 2004
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Dynamics of Interplanetary Planetismal Rings
Among the problems yet to be solved by current theories of solar system formation is the origin of the Jupiter-family comets. Several possibilities are examined using a fifth-order Runge-Kutta…
Bruce D. Lindsay, Truell W. HydeJan 28, 2004
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Exact nonlinear analytic Vlasov-Maxwell tangential equilibria with arbitrary density and temperature profiles
The tangential layers are characterized by a bulk plasma velocity and a magnetic field that are perpendicular to the gradient direction. They have been extensively described in the frame of the…
Fabrice MottezJan 28, 2004
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In-situ acoustic-based analysis system for physical and chemical properties of the lower Martian atmosphere
The Environmental Acoustic Reconnaissance and Sounding experiment (EARS), is composed of two parts: the Environmental Acoustic Reconnaissance (EAR) instrument and the Environmental Acoustic Sounding…
F. A. Farrelly, A. Petri, L. Pitolli et al.Jan 26, 2004
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Cosmic Rays and the Evolution of Earths Climate During the Last 4.6 Billion Years
Variations in the flux of Galactic Cosmic Rays (GCR) at Earth during the last 4.6 billion years are constructed from information about the Star Formation Rate (SFR) in the Milky Way and the evolution…
Henrik SvensmarkNov 18, 2003
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Scaling in long term data sets of geomagnetic indices and solar wind epsilon as seen by WIND spacecraft
We study scaling in fluctuations of the geomagnetic indices (AE, AU, and AL) that provide a measure of magnetospheric activity and of the epsilon parameter which is a measure of the solar wind…
B. Hnat, S. C. Chapman, G. Rowlands et al.Oct 14, 2003
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Spatial and Temporal Variability of the Gamma Radiation from Earth's Atmosphere during a Solar Cycle
The Solar Maximum Mission satellite's Gamma Ray Spectrometer observed Earth's atmosphere for most of the period 1980-1989. Its 28deg orbit ensured that a range of geomagnetic latitudes…
Michael J. Harris, Gerald H. Share, Mark D. LeisingAug 21, 2003
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Dust Grain Orbital Behavior Around Ceres
Many asteroids show indications they have undergone impacts with meteoroid particles having radii between 0.01 m and 1 m. During such impacts, small dust grains will be ejected at the impact site.…
R. Nazzario, T. W. Hyde, L. BargeAug 18, 2003
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Finite Coulomb Crystal Formation
Dust particles immersed within a plasma environment, such as those found in planetary rings or comets, will acquire an electric charge. If the ratio of the inter-particle potential energy to average…
J. Vasut, T. W. Hyde, L. BargeAug 18, 2003
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Dusty Plasma Correlation Function Experiment
Dust particles immersed within a plasma environment, such as those in protostellar clouds, planetary rings or cometary environments, will acquire an electric charge. If the ratio of the…
B. Smith, J. Vasut, T. Hyde et al.Aug 18, 2003
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The solar sail and the mirror
The radiation pressure exerted by incoherent light on diverse surfaces is examined. The thermodynamic rule, first given by Carnot in 1824, describes the limitation to the amount of free energy that…
Thomas GoldJun 5, 2003
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Nematic Ordering of Rigid Rods in a Gravitational Field
The isotropic-to-nematic transition in an athermal solution of long rigid rods subject to a gravitational (or centrifugal) field is theoretically considered in the Onsager approximation. The new…
Vladimir A. Baulin, Alexei R. KhokhlovMay 12, 2003
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Diamagnetic Suppression of Component Magnetic Reconnection at the Magnetopause
We present particle-in-cell simulations of collisionless magnetic reconnection in a system (like the magnetopause) with a large density asymmetry across the current layer. In the presence of an…
M. Swisdak, B. N. Rogers, J. F. Drake et al.May 7, 2003
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Gravitoelectrodynamics in Saturn's F Ring: Encounters with Prometheus and Pandora
The dynamics of Saturn's F Ring have been a matter of curiosity ever since Voyagers 1 and 2 sent back pictures of the ring's unusual features. Some of these images showed three distinct…
L. S. Matthews, T. W. HydeApr 3, 2003
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The Peculiarities of the Interaction of Phobos with the Solar Wind are Evidence of the Phobos Magnetic Obstacle (from Phobos-2 Data)
Using magnetic field and plasma data acquired during "Phobos-2" mission in regions which have not been explored before, we study the solar wind interaction with Phobos. The draping magnetic…
V. G. Mordovskaya, V. N. Oraevsky, V. A. StyashkinApr 1, 2003
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Charged Grains In Saturn's F-Ring: Interaction With Saturn's Magnetic Field
Saturn's dynamic F-Ring still presents a challenge for understanding and explaining the kinematic processes that lead to the changing structure visible in our observations of this ring. This…
L. S. Matthews, T. W. HydeMar 31, 2003
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A posteriori reading of Virtual Impactors impact probability
In this paper we define the a posteriori probability W. This quantity is introduced with the aim of suggesting a reliable interpretation of the actual threat posed by a newly discovered Near Earth…
Germano D'AbramoMar 21, 2003
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Obervational Model for Microarcsecond Astrometry with the Space Interferometry Mission
The Space Interferometry Mission (SIM) is a space-based long-baseline optical interferometer for precision astrometry. One of the primary objectives of the SIM instrument is to accurately determine…
Mark H. Milman, Slava G. TuryshevJan 21, 2003
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The Interplanetary Magnetic Field and Solar Wind Driven Magnetospheric Reconfiguration
The magnetic disturbances are associated with electric currents as it is well checked at laboratory room scales and described by the Maxwell's equations of electromagnetic field. The analysis of…
Eugene SavovJan 2, 2003
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In Situ Measurements of the Phobos Magnetic Field During the Phobos-2 Mission
In this communication, we examine in situ observations of the magnetic field in the vicinity of Phobos on the "Phobos-2" mission and give some analysis of the data during a unique experiment…
V. G. Mordovskaya, V. N. OraevskyDec 19, 2002
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From Wormholes to the Warp Drive: Using theoretical physics to place ultimate bounds on technology
The serious study of such science fiction staples as wormholes, time travel, and the warp drive, as a means of understanding and constraining possible realistic solutions within General Relativity is…
William A. HiscockNov 27, 2002
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