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Space Physics papers — page 90

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On relation between mid-latitude ionospheric ionization and quasi-trapped energetic electrons during 15 December 2006 magnetic storm
We report simultaneous observations of intense fluxes of quasi-trapped energetic electrons and substantial enhancements of ionospheric electron concentration (EC) at low and middle latitudes over…
A. V. Suvorova, L. -C. Tsai, A. V. DmitrievNov 9, 2011
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The Structure of NGC 1976 in the Radio Range
High angular resolution radio continuum images of NGC 1976 (M42, Orion A) at frequency=330 MHz (wavelength=91 cm), 1.5 GHz (20 cm) and 10.6 GHz (2.8 cm), have been aligned, placed on a common grid,…
T. L. Wilson, S. Casassus, Katie M. ChynowethOct 20, 2011
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Small scale magnetosphere: Laboratory experiment, physical model and Hall MHD simulation
A problem of magnetosphere formation on ion inertia scale around weakly magnetized bodies is investigated by means of laboratory experiment, analytical analysis and 2.5D Hall MHD simulation.…
I. F. Shaikhislamov, V. M. Antonov, Yu. P. Zakharov et al.Oct 20, 2011
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Electron-cylotron maser radiation from electron holes: Downward current region
The electron-cyclotron maser emission from electron holes is applied to holes generated in the downstream current region of the aurora. We suggest that part of the fine structure observed in the…
R. A. Treumann, W. Baumjohann, R. PotteletteOct 19, 2011
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Removing Orbital Debris with Lasers
Orbital debris in low Earth orbit (LEO) are now sufficiently dense that the use of LEO space is threatened by runaway collisional cascading. A problem predicted more than thirty years ago, the threat…
Claude R. Phipps, Kevin L. Baker, Brian Bradford et al.Oct 17, 2011
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The LTP Experiment on LISA Pathfinder: Operational Definition of TT Gauge in Space
The European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA) are planning the Laser Interferometer Space Antenna (LISA) mission in order to detect GW. The need of…
Michele ArmanoOct 13, 2011
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Power Anisotropy in the Magnetic Field Power Spectral Tensor of Solar Wind Turbulence
We observe the anisotropy of the power spectral tensor of magnetic field fluctuations in the fast solar wind for the first time. In heliocentric RTN coordinates the power in each element of the…
Robert T. Wicks, Miriam A. Forman, Timothy S. Horbury et al.Sep 30, 2011
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Interferometric Observations of Geosynchronous Satellites
In recent years, a large number of geosynchronous satellites are being planned to provide augmentation services for enhancing the precision to global positioning systems, e.g., GPS, in applications…
C. R. Subrahmanya, Peeyush Prasad, R. SomashekarSep 20, 2011
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Three-Dimensional Structure of Solar Wind Turbulence
We present a measurement of the scale-dependent, three-dimensional structure of the magnetic field fluctuations in inertial range solar wind turbulence with respect to a local, physically motivated…
C. H. K. Chen, A. Mallet, A. A. Schekochihin et al.Sep 12, 2011
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Weakly collisional Landau damping and three-dimensional Bernstein-Greene-Kruskal modes: New results on old problems
Landau damping and Bernstein-Greene-Kruskal (BGK) modes are among the most fundamental concepts in plasma physics. While the former describes the surprising damping of linear plasma waves in a…
C. S. Ng, A. Bhattacharjee, F. SkiffSep 7, 2011
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Geoeffectiveness and efficiency of CIR, Sheath and ICME in generation of magnetic storms
We investigate relative role of various types of solar wind streams in generation of magnetic storms. On the basis of the OMNI data of interplanetary measurements for the period of 1976-2000 we…
Yu. I. Yermolaev, N. S. Nikolaeva, I. G. Lodkina et al.Sep 6, 2011
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The extinction map of the OMC-1 molecular cloud behind the Orion Nebula
Our main goal is to derive a new extinction map of the OMC-1, obtaining information about the structure of the OMC-1 and the Orion Nebula Cluster. The most recent near-infrared catalog of stars is…
Gaetano Scandariato, Massimo Robberto, Isabella Pagano et al.Aug 30, 2011
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Electron velocity distribution instability in magnetized plasma wakes and artificial electron mass
The wake behind a large object (such as the moon) moving rapidly through a plasma (such as the solar wind) contains a region of depleted density, into which the plasma expands along the magnetic…
I. H. HutchinsonAug 29, 2011
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Tsunami effects on the Z component of the geomagnetic field
The vertical component (Z) of the geomagnetic field observed by ground-based observatories of the INTERMAGNET network has been used to analyze the effects of the movement of electrically conducting…
Virginia Klausner, Margarete O. Domingues, Odim Mendes et al.Aug 24, 2011
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Characteristics of solar diurnal variations: a case study based on records from the ground magnetic observatory at Vassouras, Brazil
The horizontal component amplitudes of magnetograms recorded by ground-based observatories of the INTERMAGNET network have been used to analyze the global pattern variance of the solar diurnal…
Virginia Klausner, Andres R. R. Papa, Odim Mendes et al.Aug 23, 2011
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Ultraviolet stimulated electron source for use with low energy plasma instrument calibration
We have developed and demonstrated a versatile, compact electron source that can produce a monoenergetic electron beam up to 50 mm diameter from 0.1 to 30 keV with an energy spread of <10 eV. By…
Kevin Henderson, Ron Harper, Herb Funsten et al.Aug 19, 2011
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Magnetosphere-ionosphere coupling in Jupiter's middle magnetosphere: computations including a self-consistent current sheet magnetic field model
In this paper we consider the effect of a self-consistently computed magnetosdisc field structure on the magnetosphere-ionosphere coupling current system at Jupiter. We find that the azimuthal…
J. D. NicholsAug 16, 2011
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United Nations Basic Space Science Initiative: 2011 Status Report on the International Space Weather Initiative
The UNBSSI is a long-term effort for the development of astronomy and space science through regional and international cooperation in this field on a worldwide basis. A series of workshops on BSS was…
S. Gadimova, H. J. Haubold, D. Danov et al.Aug 10, 2011
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Determining the wavelength of Langmuir wave packets at the Earth's bow shock
The propagation of Langmuir waves in plasmas is known to be sensitive to density fluctuations. Such fluctuations may lead to the coexistence of wave pairs that have almost opposite wave-numbers in…
V. V. Krasnoselskikh, T. Dudok de Wit, S. D. BaleJul 22, 2011
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Apparent temperature anisotropies due to wave activity in the solar wind
The fast solar wind is a collisionless plasma permeated by plasma waves on many different scales. A plasma wave represents the natural interplay between the periodic changes of the electromagnetic…
Daniel Verscharen, Eckart MarschJun 29, 2011
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The scale-free texture of the fast solar wind
The higher order statistics of magnetic field magnitude fluctuations in the fast quiet solar wind are quantified systematically scale-by-scale for the first time. We find a single global non-Gaussian…
B. Hnat, S. C. Chapman, G. Gogoberidze et al.Jun 23, 2011
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Electrostatic Structures in Space Plasmas: Stability of Two-dimensional Magnetic Bernstein-Greene-Kruskal Modes
Electrostatic structures have been observed in many regions of space plasmas, including the solar wind, the magnetosphere, the auroral acceleration region, and in association with shocks, turbulence,…
C. S. Ng, S. J. Soundararajan, E. YasinJun 21, 2011
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Electron-cylotron maser radiation from electron holes: Upward current region
Electron holes are suggested to be an important source for generation of electron-cyclotron maser radiation. We demonstrate that electron holes generated in a ring-horseshoe distribution in the…
R. A. Treumann, W. Baumjohann, R. PotteletteJun 1, 2011
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Organization of the magnetosphere during substorms
The change in degree of organization of the magnetosphere during substorms is investigated by analyzing various geomagnetic indices, as well as interplanetary magnetic field z-component and solar…
Tatjana Zivkovic, Kristoffer RypdalMay 25, 2011
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Low-dimensionality and predictability of solar wind and global magnetosphere during magnetic storms
The storm index SYM-H, the solar wind velocity v, and interplanetary magnetic field Bz show no signatures of low-dimensional dynamics in quiet periods, but tests for determinism in the time series…
Tatjana Zivkovic, Kristoffer RypdalMay 24, 2011
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