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Deriving the characteristics of warm electrons (100-500 eV) in the magnetosphere of Saturn with the Cassini Langmuir probe
Schippers, P.; Gurnett, D. A.; Lewis, G. R. +6 more
Though Langmuir probes (LP) are designed to investigate cold plasma regions (e.g. ionospheres), a recent analysis revealed a strong sensitivity of the Cassini LP measurements to hundreds of eV electrons. These warm electrons impact the surface of the probe and generate a significant current of secondary electrons, that impacts both the DC level an…
NR Peg: A new highly active semi-detached binary
Erdem, A.; Oblak, E.; Kurpińska-Winiarska, M. +1 more
This paper presents the first analysis of spectroscopic and photometric observations of the eclipsing binary star NR Peg. ELODIE Hα observations indicate that the secondary component is a chromospherically active star; however, the spectral line profiles (especially of neutral metals) of NR Peg are very wide and have a complex structure with asymm…
Erratum: "Suzaku Observation of the Black Hole Binary 4U 1630-47 in the Very High State" (2014, ApJ, 790, 20)
Done, Chris; Shirahata, Mai; Ueda, Yoshihiro +7 more
Mars EXPRESS observation of the PHOENIX entry: simulations, planning, results and lessons learned
Reberac, A.; Montmessin, F.; Bertaux, J. -L. +10 more
NASA's PHOENIX spacecraft has successfully landed on Mars on 25 May 2008. ESA supported the event by recording signals from PHOENIX by the Mars EXPRESS spacecraft using its lander communication subsystem. Following numerical simulations of the probe entry plume emission, two Mars EXPRESS instruments, namely the High Resolution and Stereo Camera (H…
Observation of shocks associated with CMEs in 2007
Zhang, T. L.; Balikhin, M. A.; Taktakishvili, A. +1 more
The interaction of CMEs with the solar wind can lead to the formation of interplanetary shocks. Ions accelerated at these shocks contribute to the solar energetic protons observed in the vicinity of the Earth. Recently a joint analysis of Venus Express (VEX) and STEREO data by Russell et al. (2009) have shown that the formation of strong shocks as…
A statistical study of C IV regions in 20 Oe-stars
Popović, L. Č.; Antoniou, A.; Stathopoulos, D. +3 more
In this paper, using the Gauss-Rotation model (GR model), we analyse the UV C IV resonance lines in the spectra of 20 Oe-stars of different spectral subtypes, in order to detect the structure of C IV region. We study the presence and behavior of absorption clouds and analyse their characteristics. From this analysis we can calculate the values of …
Ultraviolet spectral behavior of IP Peg and DW UMa in high, intermediate and low states from the HST and IUE satellites
Sanad, M. R.
Ultraviolet spectra of IP Peg and DW UMa observed with Hubble Space Telescope Space Telescope Imaging Spectrograph & Faint Object Spectrograph (HST STIS FOS) and International Ultraviolet Explorer (IUE) satellites were analyzed during the period between 1989-1994 and 1985-2004. Different profiles of two systems showing variations of line fluxe…
Integrated spectroscopy of the Herschel Reference Survey (Corrigendum). The spectral line properties of a volume-limited, K-band-selected sample of nearby galaxies
Buat, V.; Boselli, A.; Cortese, L. +2 more
Philae Attitude Determination through Nonlinear Optimal Identification of Solar Arrays Telemetry
Topputo, F.; Bernelli-Zazzera, F.; Caputo, G. M.
In Rosetta lander Philae, the ability to increase the on-comet power production gives the chance to maintain the system alive, as well as the opportunity to accomplish scientific experiments during the Long Term Science (LTS) phase. This can be accomplished if the lander operates at solar incidence angles that maximize the total power produced by …
A filament eruption with an apparent reshuffle of endpoints
Filippov, Boris
A filament eruption during 2010 April 30-May 1, which shows the reconnection of one filament leg with a region far away from its initial position, is analysed. Observations from three viewpoints are used for measurements of endpoint coordinates as precise as possible. The northern leg of the erupting prominence loop `jumps' laterally to a latitude…