Search Publications
Wave Number Spectra in the Solar Wind, the Foreshock, and the Magnetosheath
Glassmeier, K. -H.; Goldstein, M. L.; Narita, Y. +2 more
The three-component model of magnetic field fluctuations is applied to the analysis of the wave number spectra to study fluctuations in the solar wind, the foreshock, and the magnetosheath. The analysis exhibits a transition of the dominant fluctuation component from the solar wind to the magnetosheath, from the two-dimensional to the Alfvénic in …
Analytical description of electric currents in the magnetosheath region
Veselovsky, I. S.; Vandas, M.; Romashets, E.
Volume currents in the magnetosheath region are calculated within the framework of a new analytical model. Magnetic field structure in the region is found, satisfying boundary conditions on the bow shock and the magnetopause, and then volume currents are calculated using the Maxwell equation. Surface bow shock and magnetopause currents are calcula…
The Cluster Mission: Space Plasma in Three Dimensions
Escoubet, C. P.; Goldstein, M. L.; Taylor, M. G. G. T. +2 more
At the time of writing, Cluster is approaching 8 years of successful operation and continues to fulfill, if not exceed its scientific objectives. After a nominal mission lifetime of 2 years Cluster currently in its extended mission phase, up to June 2009, with a further extension request submitted for a further 3.5 years. The primary goals of the …
On the Relation between Surge Activities and a Photospheric Horizontal Velocity Field
Kitai, Reizaburo
A photospheric horizontal velocity field was observed in an active region, NOAA 8375, which showed high Hα surge activities on 1998 November 6. From analyses of Hα images, the photospheric horizontal velocity field, and the magnetic field in and around the active region, we found the following: (1) Meso-granular or supergranular photospheric horiz…
Non-parametric deprojection of surface brightness profiles of galaxies in generalised geometries
Chakrabarty, D.
Aims: We present a new Bayesian non-parametric deprojection algorithm DOPING (Deprojection of Observed Photometry using an INverse Gambit), that is designed to extract 3-D luminosity density distributions ρ from observed surface brightness maps I, in generalised geometries, while taking into account changes in intrinsic shape with radius, usi…
Spatial and Temporal Structures in the Vicinity of the Earth's Tail Magnetic Separatrix Cluster Observations
Zelenyi, L. M.; Sauvaud, J. -A.; Grigorenko, E. E. +1 more
The processes of non-adiabatic particle acceleration occurring in the vicinity of magnetic neutral lines produce highly accelerated (up to 2,500 km/s) field-aligned ion beams. Ion beams are usually observed in the Plasma Sheet Boundary Layer (PSBL) i.e. in the vicinity of magnetic separatrix between open and closed magnetic field lines. These acce…
A far-infrared survey at the North Galactic Pole - I. Nearby star-forming galaxies and effect of confused sources on source counts
Kotilainen, Jari K.; Juvela, Mika; Mattila, Kalevi +3 more
We present follow-up observations of the far-infrared (FIR) sources at 90, 150 and 180 µm detected as part of the ISOPHOT EBL project, which has recently measured the absolute surface brightness of the cosmic infrared background (CIRB) radiation for the first time independently from COBE data. We have observed the fields at the North Galacti…
The Sub-Kev Atom Reflecting Analyzer (sara) Experiment Aboard CHANDRAYAAN-1 Mission: Instrument and Observations
Barabash, Stas; Holmström, Mats; Wieser, Martin +7 more
SARA experiment aboard the first Indian lunar mission Chandrayaan-1 had the objective to explore the solar wind-lunar interaction using energetic neutral atoms (ENA) from the lunar surface as diagnostic tool. SARA consisted of an ENA imaging mass analyzer CENA (Chandrayaan-1 Energetic Neutral Analyzer) and an ion mass analyser SWIM (Solar Wind Mon…
STAFF Instrument Products Distributed Through the Cluster Active Archive
Maksimovic, M.; de Conchy, Y.; Bouzid, V. +5 more
Cluster Spatio-Temporal Analysis of Field Fluctuations (STAFF) high resolution data that are available at Cluster Active Archive (CAA) comprise two main parts, corresponding to data issued from the two onboard data analysers. The STAFF waveform analyser (STAFF-SC) provides data in the frequency range 0.1-10 Hz or 0.1-180 Hz, depending on the space…
Supersoft X-ray sources: Confronting the van den Heuvel paradigm
Charles, P. A.; Heathcote, B.; McGowan, K. E. +3 more
The origin of the extremely soft (low temperature) X-rays produced in the supersoft X-ray sources (or SSS) has been a subject of debate for much of the 25 years since their discovery. The currently accepted paradigm is that they are Eddington-limited accreting white dwarfs in which the accreted material is undergoing steady nuclear burning, thereb…