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Variations of the magnetic field near Mars caused by magnetic crustal anomalies
Kallio, E.; Fedorov, A.; Janhunen, P. +2 more
The possible avenues for photoelectron transport were determined during southern hemisphere winter at Mars by using a mapping analysis of the theoretical magnetic field. Magnetic field line tracing was performed by superposing two magnetic field models: (1) magnetic field derived from a three-dimensional (3D) self-consistent quasi-neutral hybrid m…
Spatial distribution of dust in the shell elliptical NGC 5982
Del Burgo, C.; Carter, D.; Sikkema, G.
Aims:Shells in Ellipticals are peculiar faint sharp edged features that are thought to be formed by galaxy mergers. We determine the shell and dust distributions, and colours of a well-resolved shell and the underlying galaxy in NGC 5982, and compare the spatial distributions of the dust and gas phases, in order to investigate the origin of shells…
TC-1 observation of ion high-speed flow reversal in the near-Earth plasma sheet during substorm
Dandouras, I.; Reme, H.; Carr, C. M. +4 more
Based on measurements of FGM and HIA on board TC-1 at its apogee on Septem- ber 14, 2004, we analyzed the ion high-speed flows in the near-Earth plasma sheet observed during the substorm expansion phase. Strong tailward high-speed flows (Vx -350 km/s) were first seen at about X -13.2 RE in near-Earth magnetotail, one minute later the flows reverse…
Determination of reconnected flux via remote sensing
Penz, T.; Kubyshkin, I. V.; Nakamura, R. +4 more
Magnetic reconnection is one of the most fundamental processes in the magnetosphere. We present here a simple method to determine the essential parameters of reconnection such as reconnected flux and location of the reconnection site out of single spacecraft data via remote sensing. On the basis of a time-dependent reconnection model, the dependen…
Jet-driven outflows in Seyfert galaxies .
Wilson, A. S.; Rosario, D. J.; Nelson, C. H. +1 more
Growing evidence over the past decade has indicated that low-luminosity active galaxies are often associated with outflows from their nuclei. In particular, a small but important fraction of Seyfert galaxies have extended collimated radio emission on the scales of the narrow-line region (NLR). In most of these cases, the emission-line gas displays…
Discontinuity Orientation, Motion, and Thickness
Sonnerup, Bengt U. O.; Haaland, Stein E.; Paschmann, Gotz
The first light-curve analysis of eclipsing binaries observed by the INTEGRAL/OMC
Zasche, P.
Three Algol-type binaries in Cygnus constellation were selected for an analysis from a huge database of observations made by the INTEGRAL/OMC camera. These data were processed and analyzed, resulting in a first light-curve study of these neglected eclipsing binaries. The temperatures of the primary components range from 9500 K to 10,500 K and the …
Revisiting Iapetus following recent Cassini observations
Mendis, D. A.; Axford, W. I.
The recent observations of the Saturnian satellite Iapetus by the Cassini spacecraft support the theory proposed by us, over three decades ago, explaining the large brightness asymmetry between the leading and trailing faces of this synchronous satellite. Here we will revisit the question of the observed brightness variations, with orbital phase, …
Similarities and Dissimilarities between the Variations of CME and Other Solar Parameters at Different Heliographic Latitudes and Time Scales
Kane, R. P.
From the LASCO CME (Coronal Mass Ejection) catalog, the occurrence frequencies of all CMEs (all strong and weak CMEs, irrespective of their widths) were calculated for 3-month intervals and their 12-month running means determined for cycle 23 (1996 - 2007) and were compared with those of other solar parameters. The annual values of all-CME frequen…
Pulsations of auroral kilometric radiation at Pc1 frequencies
Pickett, Jolene; Hanasz, Jan; Schreiber, Roman +1 more
Cases of AKR pulsations at frequencies 1 to 4 Hz, typical for Pc1 geomagnetic pulsations, were observed from four Cluster spacecraft. 15 events were found in years 2001-2005, with 14 occurring in a recovery phase of a strong magnetic storm. In a studied event of 22 June 2003 the AKR pulses show positive frequency drifts, corresponding to the earth…