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Simultaneous in-situ observations of the signatures of dayside reconnection at the high- and low-latitude magnetopause
Balogh, A.; Davies, J. A.; Wild, J. A. +10 more
We present magnetic field and particle data recorded by the Cluster and Geotail satellites in the vicinity of the high- and low-latitude dayside magnetopause, respectively, on 17 February 2003. A favourable conjunction of these spacecraft culminated in the observation of a series of flux transfer events (FTEs), characterised by bipolar perturbatio…
New insights in the FUV into the activity of the Herbig Ae star HD 163296
Deleuil, M.; Bouret, J. -C.; Roberge, A. +6 more
We present an analysis of the FUSE spectra of
XMM observations of the high-redshift quasar RXJ1028.6 - 0844 at z= 4.276: soft X-ray spectral flattening
Fabian, A. C.; Matsuoka, M.; Celotti, A. +2 more
We present results from a new XMM-Newton observation of the high-redshift quasar RXJ1028.6 - 0844 at a redshift of 4.276. The soft X-ray spectral flattening, as reported by a previous study with ASCA, is confirmed to be present, with, however, a reduced column density when modelled by absorption. The inferred column density for absorption intrinsi…
GaBoDS: the Garching-Bonn Deep Survey. III. Lyman-break galaxies in the Chandra Deep Field South
Simon, P.; Schrabback, T.; Bomans, D. J. +10 more
We present first results of our search for high-redshift galaxies in deep CCD mosaic images. As a pilot study for a larger survey, very deep images of the Chandra Deep Field South (CDFS), taken with WFI@MPG/ESO2.2m, are used to select large samples of 1070 U-band and 565 B-band dropouts with the Lyman-break method. The data of these Lyman-break ga…
Direct Evidence for an Early Reionization of the Universe?
Panagia, N.; Stern, D.; Dickinson, M. +5 more
We examine the possible reionization of the intergalactic medium by the source UDF 033238.7-274839.8 (hereafter HUDF-JD2), which was discovered in deep HST/VLT/Spitzer images obtained as part of the Great Observatories Origins Deep Survey and Hubble Ultra Deep Field projects. Mobasher et al. have identified HUDF-JD2 as a massive (~6×1011
Magnetic network dynamics: Activity level, feature size and anchoring depth
Meunier, N.
A large data set of MDI magnetograms is studied in order to analyze the global dynamics of magnetic structures from network to active regions. Two complementary techniques are used: feature tracking and correlation tracking. The very large data set allows the variation of their dynamics (angular rotation velocity and meridional circulation) to be …
Multiple Flux Rope Events at the High-Latitude Magnetopause: Cluster/Rapid Observation on 26 January, 2001
Balogh, A.; Glassmeier, K. -H.; Zong, Q. -G. +14 more
Cluster measurements of the cusp and high latitude magnetopause boundary on 26 January, 2001 confirm that the cusp is a dynamic region full of energetic charged particles and turbulence. An energetic ion layer at high-latitudes beyond and adjacent to the duskside magnetopause exists when the Interplanetary Magnetic Field (IMF) has a southward orie…
The Cassini Campaign observations of the Jupiter aurora by the Ultraviolet Imaging Spectrograph and the Space Telescope Imaging Spectrograph
Stewart, Ian; Gérard, J. -C.; Gustin, Jacques +6 more
We have analyzed the Cassini Ultraviolet Imaging Spectrometer (UVIS) observations of the Jupiter aurora with an auroral atmosphere two-stream electron transport code. The observations of Jupiter by UVIS took place during the Cassini Campaign. The Cassini Campaign included support spectral and imaging observations by the Hubble Space Telescope (HST…
Comparison of Solar Cycle Variations of Solar p-Mode Frequencies from GONG and MDI
Chou, Dean-Yi; Serebryanskiy, Alexander
The solar p-mode frequencies change with the solar cycle. The horizontal phase velocity dependence of the relative frequency change scaled by mode mass provides depth information on the perturbations in the solar interior. Both GONG data and SOHO MDI data show that the horizontal phase velocity dependence of the scaled relative frequency change va…
Coordinated studies of the geospace environment using Cluster, satellite and ground-based data: an interim review
Wild, J. A.; Lester, M.; Nakamura, R. +10 more
A little more than four years after its launch, the first magnetospheric, multi-satellite mission Cluster has already tremendously contributed to our understanding about the coupled solar wind - magnetosphere - ionosphere system. This is mostly due to its ability, for the first time, to provide instantaneous spatial views of structures in the syst…