Thermal recoil force, telemetry, and the Pioneer anomalyPrecision navigation of spacecraft requires accurate knowledge of small forces, including the recoil force due to anisotropies of thermal radiation emitted by spacecraft systems. We develop a…Viktor T. Toth, Slava G. Turyshev·Jan 29, 2009SaveLearn
The Weibel Instability inside the Electron-Positron Harris SheetRecent full-particle simulations of electron-positron reconnection have revealed that the Weibel instability plays an active role in controlling the dynamics of the current layer and maintaining fast…Yi-Hsin Liu, Marc Swisdak, James F. Drake·Jan 29, 2009SaveLearn
Independent analysis of the orbits of Pioneer 10 and 11Independently developed orbit determination software is used to analyze the orbits of Pioneer 10 and 11 using Doppler data. The analysis takes into account the gravitational fields of the Sun and…Viktor T. Toth·Jan 22, 2009SaveLearn
Data Analysis and Phase Ambiguity Removal in the ACES Microwave LinkThe ACES (Atomic Clock Ensemble in Space) mission is an ESA - CNES project with the aim of setting up onboard the International Space Station (ISS) several highly stable atomic clocks with a…Loic Duchayne, Peter Wolf, Luigi Cacciapuoti et al.·Jan 16, 2009SaveLearn
Comment on "Interplanetary coronal mass ejections that are undetected by solar coronagraphs" by T. A. Howard and G. M. SimnettHoward and Simnett (HS) employed a new technique for associating LASCO CMEs to SMEI ICMEs. In order to extrapolate the SMEI data back to the LASCO field of view they used nonlinear trajectories,…Marta Skirgiello·Jan 2, 2009SaveLearn
Microscopic Approach to Analyze Solar-Sail Space-Environment EffectsNear-sun space-environment effects on metallic thin films solar sails as well as hollow-body sails with inflation fill gas are considered. Analysis of interaction of the solar radiation with the…Roman Ya. Kezerashvili, Gregory L. Matloff·Dec 31, 2008SaveLearn
Space Weathering on Near-Earth Objects investigated by neutral-particle detectionThe ion-sputtering (IS) process is active in many planetary environments in the Solar System where plasma precipitates directly on the surface (for instance, Mercury, Moon, Europa). In particular,…C. Plainaki, A. Milillo, S. Orsini et al.·Nov 28, 2008SaveLearn
On the competition between the mirror and electromagnetic ion cyclotron modesWe give a simple argument for the exclusive existence of mirror and electromaghetic ion cyclotron modes in anisotropic high-β plasmas. It is shown that, in addition to a large domain of coexistence…R. A. Treumann, O. D. Constantinescu·Nov 26, 2008SaveLearn
The search for a strategy for mankind to survive the solar Red Giant catastropheIn around 5 gigayears our Sun will grow to a Red Giant and will swallow Earth. The plan is subdivided into two parts: We propose to construct some kind of parasol to shadow Earth. The position of the…M. Taube, W. Seifritz·Nov 25, 2008SaveLearn
Auroral evidence for multiple reconnection in the magnetospheric tail plasma sheetWe present auroral evidence for multiple and, most probably, small scale reconnection in the near Earth magnetospheric plasma sheet current layer during auroral activity. Hall currents as the source…R. A. Treumann, C. H. Jaroschek, R. Pottelette·Nov 1, 2008SaveLearn
On deformation of electron holes in phase spaceThis Letter shows that for particularly shaped background particle distributions momentum exchange between phase space holes and the distribution causes acceleration of the holes along the magnetic…R. A. Treumann, C. H. Jaroschek, R. Pottelette·Oct 25, 2008SaveLearn
Modal abundances of CAIs: Implications for bulk chondrite element abundances and fractionationsModal abundances of Ca,Al-rich inclusions (CAIs) are poorly known and reported data scatter across large ranges. We combine reported CAI modal abundances and our own set, and present a complete list…Dominik C. Hezel, Sara S. Russell, Aidan J. Ross et al.·Oct 13, 2008SaveLearn
Some proves of integrated influence of geomagnetic activity and weather changes on human healthOur environment includes many factors, and each person on the Earth is permanently influenced by two of them: weather and magnetic field. It was found in the works of many investigators that the…O. V. Khabarova, S. Dimitrova·Oct 2, 2008SaveLearn
The beryllium hollow-body solar sail: exploration of the Sun's gravitational focus and the inner Oort CloudSpacecraft kinematics, peak perihelion temperature and space environment effects during solar-radiation-pressure acceleration for a beryllium hollow-body interstellar solar sail inflated with…Gregory L. Matloff, Roman Ya. Kezerashvili, Claudio Maccone et al.·Sep 20, 2008SaveLearn
Neutral Solar Wind Generated by Lunar Exospheric Dust at the TerminatorWe calculate the flux of neutral solar wind observed on the lunar surface at the terminator due to solar wind protons penetrating exospheric dust grains with (1) radii greater than 0.1 microns and…Michael R. Collier, Timothy J. Stubbs·Sep 17, 2008SaveLearn
Estimating radiative momentum transfer through a thermal analysis of the Pioneer AnomalyA methodology based on point-like sources is discussed, enabling a reliable estimate of the acceleration of the Pioneer 10 and 11 probes caused by thermal effects. A sensitivity analysis of the…O. Bertolami, F. Francisco, P. J. S. Gil et al.·Sep 16, 2008SaveLearn
Precise Orbital Tracking of an Asteroid with a Phased Array of Radio TranspondersDeflecting an asteroid from an Earth impact trajectory requires only small velocity changes, typically of the order of microns per second, if done many years ahead of time. For this, a highly precise…Bernhard W. Adams·Sep 15, 2008SaveLearn
Direct measurement of the cross-shock electric potential at low plasma β, quasi-perpendicular bow shocksWe use the Cluster EFW experiment to measure the cross-shock electric field at ten low β, quasi-perpendicular supercritical bow shock crossings on March 31, 2001. The electric field data are…S. D. Bale, F. S. Mozer, V. V. Krasnoselskikh·Sep 15, 2008SaveLearn
Comment on "Sizes and relative geoeffectiveness of interplanetary coronal mass ejections and the preceding shock sheaths during intense storms in 1996-2005" by J. Zhang et alRecently Zhang et al. [2008] presented a statistical study of sizes and relative geoeffectiveness of ICMEs (bodies of magnetic clouds) and preceding sheaths for 46 events responsible for intense (Dst…Yu. I. Yermolaev, M. Yu. Yermolaev·Aug 30, 2008SaveLearn
Observational evidence of CMEs interacting in the inner heliosphere as inferred from MHD simulationsThe interaction of multiple Coronal Mass Ejections (CMEs) has been observed by LASCO coronagraphs and by near-Earth spacecraft, and it is thought to be an important cause of geo-effective storms,…N. Lugaz, W. B. Manchester, I. I. Roussev et al.·Aug 27, 2008SaveLearn
The Brightness of Density Structures at Large Solar Elongation Angles: What is Being Observed by STEREO/SECCHI?We discuss features of coronal mass ejections (CMEs) that are specific to heliospheric observations at large elongation angles. Our analysis is focused on a series of two eruptions that occurred on…N. Lugaz, A. Vourlidas, I. I. Roussev et al.·Aug 1, 2008SaveLearn
Energy Cascades in Astrophysical PlasmaA local turbulence model is developed to study energy cascades in the interstellar medium (ISM) based on self-consistent two-dimensional fluid simulations. The model describes a partially ionized…Dastgeer Shaikh, Gary P. Zank·Jul 20, 2008SaveLearn
Copernicus's epicycles from Newton's gravitational force law via linear perturbation theory in geometric algebraWe derive Copernicus's epicycles from Newton's gravitational force law by assuming that a planet's orbit is a perturbed circular orbit, with the perturbation defined to be co-rotating…Quirino M. Sugon, Sarah Bragais, Daniel J. McNamara·Jul 17, 2008SaveLearn
The Pioneer AnomalyAnalysis of the radio-metric data from Pioneer 10 and 11 spacecrafts has indicated the presence of an unmodeled acceleration starting at 20 AU, which has become known as the Pioneer anomaly. The…Jose A. de Diego, Dario Nunez·Jul 7, 2008SaveLearn
Defining planets by a generating functionA law of semi-major axes in the Solar system is described. The proposed law is recommended as an additional criterion for planet definition as it represents a generating function of planetary…Ivan Kotliarov·Jul 4, 2008SaveLearn