Search Publications
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…
The Interplanetary Responses to the Great Solar Activities in Late October 2003
Wang, Yuming; Wang, Jingxiu; Wang, S. +4 more
Based on the observations of the Sun and the interplanetary medium, a series of solar activities in late October 2003 and their consequences are studied comprehensively. Thirteen X-ray flares with importance greater than M-class, six frontside halo coronal mass ejections (CMEs) with span angle larger than 100∘ and three associated erupt…
The ISO-2MASS AGN survey: on the type-1 sources
Cesarsky, C.; Siebenmorgen, R.; Haas, M. +9 more
We combined the ISOCAM Parallel Mode Survey at 6.7 µm (LW2 filter) with the Two Micron All Sky Survey in order to obtain a powerful tool to search for AGN independent of dust extinction. Using moderate colour criteria H-K>0.5 and K-LW2>2.7 we have selected a sample of 77 AGN candidates in an effective area of ~10 square degrees. By mea…
A new model of total solar irradiance based on sunspot areas
Walton, Stephen R.; Preminger, Dora G.
We show that daily sunspot area can be used in a simple model to reconstruct daily variations in the total solar irradiance, S. The model assumes that all fluctuations in S are correlated with the emergence of sunspots on the solar disk. Cotemporal data for S and sunspot area are analysed to extract the finite impulse response function that descri…
The Evolution of Stellar Mass in Galaxies in the NICMOS Ultra Deep Field
Gwyn, S. D. J.; Hartwick, F. D. A.
We measure the buildup of the stellar mass of galaxies from z=6 down to z=1. Using 15 band multicolor imaging data in the NICMOS Ultra Deep Field we derive photometric redshifts and masses for 796 galaxies down to HAB=26.5 mag. The derived evolution of the global stellar mass density of galaxies is consistent with previous star formatio…
Absolute spectrophotometry of northern compact planetary nebulae
Corradi, R. L. M.; Wright, S. A.; Perinotto, M.
We present medium-dispersion spectra and narrowband images of six northern compact planetary nebulae (PNe):
A Chandra Observation of the Nearby Lenticular Galaxy NGC 5102: Where are the X-Ray Binaries?
Ponman, T. J.; Jones, C.; Kraft, R. P. +2 more
We present results from a 34 ks Chandra ACIS-S observation of the low-mass X-ray binary (LMXB) population and the hot interstellar medium (ISM) in the nearby (d=3.1 Mpc) lenticular galaxy NGC 5102, previously shown to have an unusually low X-ray luminosity. We detect 11 X-ray point sources within the D25 optical boundary of the galaxy (…