Search Publications
Thermal phase curves observed in Saturn's main rings by Cassini-CIRS: Detection of an opposition effect?
Altobelli, N.; Flandes, A.; Leyrat, C. +4 more
We report on thermal phase curve measurements of Saturn's main rings by the CIRS infrared spectrometer on-board the CASSINI spacecraft. The extensive data set acquired by Cassini since its insertion in orbit around Saturn provides for the first time spatially resolved temperature measurements over broad phase angle ranges and for different solar e…
Three-Dimensional Kinematics of Coronal Mass Ejections from STEREO/SECCHI-COR2 Observations in 2007 - 2008
Llebaria, A.; Lamy, P.; Boursier, Y.
We present a new method to perform the three dimensional characterization of coronal mass ejections (CMEs) using stereoscopic images obtained with the STEREO/SECCHI-COR2 coronagraphs. Two approaches are proposed, and each associated algorithm gives the trajectory of the CME and its kinematical properties (velocity and acceleration profiles) intend…
Constraints on the kinematics of the 44Ti ejecta of Cassiopeia A from INTEGRAL/SPI
Knödlseder, J.; Decourchelle, A.; Vink, J. +2 more
Context: The medium-lived 44Ti isotope is synthesised by explosive Si-burning in core-collapse supernovae. It is extremely sensitive to the dynamics of the explosion and therefore can be used to indirectly probe the explosion scenario. The young supernova remnant Cassiopeia A is to date the only source of gamma-ray lines from 44
Physical collisions of moonlets and clumps with the Saturn's F-ring core
Charnoz, Sébastien
Since 2004, observations of Saturn's F-ring have revealed that the ring's core is surrounded by structures with radial scales of hundreds of kilometers, called "spirals" and "jets." Gravitational scattering by nearby moons was suggested as a potential production mechanism; however, it remained doubtful because a population of Prometheus-mass moons…
Hybrid simulation of foreshock waves and ion spectra and their linkage to cusp energetic ions
Wang, X. Y.; Lin, Y.; Chang, S. -W.
A three-dimensional global hybrid simulation is carried out to investigate energetic ions and electromagnetic waves in the quasi-parallel (Q-$\parallel$) bow shock and cusp for a typical interplanetary magnetic field configuration during the cusp energetic particle events. The bow shock, magnetosheath, and dayside magnetosphere form by interaction…
Persistent and Self-Similar Large-Scale Density Fluctuations in the Solar Corona
Bruno, R.; Antonucci, E.; D'Amicis, R. +1 more
Density fluctuations of the low and midlatitude solar corona plasma are analyzed during the recent solar minimum period. Long time series of the intensity of the neutral hydrogen Lyα, 1216 Å, line have been observed with the UltraViolet Coronagraph Spectrometer/Solar and Heliospheric Observatory at 1.7 R sun, in low-latitude streamers a…
The Ulysses Catalog of Solar Hard X-Ray Flares
Hurley, K.; Hudson, H. S.; Tranquille, C.
Ulysses was launched in October 1990, and its Solar X-ray/Cosmic Gamma-Ray Burst Experiment (GRB) has provided more than 13 years of uninterrupted observations of solar X-ray flare activity. Due to the large variation of the relative solar latitude and longitude of the spacecraft orbit with respect to the Earth, the perspective of the GRB instrume…
Hot Debris Dust Around HD 106797
Nakagawa, Takao; Onaka, Takashi; Ootsubo, Takafumi +10 more
Photometry of the A0 V main-sequence star HD 106797 with AKARI and Gemini/T-ReCS is used to detect excess emission over the expected stellar photospheric emission between 10 and 20 µm, which is best attributed to hot circumstellar debris dust surrounding the star. The temperature of the debris dust is derived as T d ~ 190 K by ass…
An XMM-Newton view of the dipping low-mass X-ray binary XTE J1710-281
Boirin, L.; Younes, G.; Sabra, B.
Context: Studying the spectral changes during the dips exhibited by almost edge-on, low-mass X-ray binaries (LMXBs) is a powerful means of probing the structure of accretion disks. The XMM-Newton, Chandra, or Suzaku discovery of absorption lines from Fe xxv and other highly-ionized species in many dippers has revealed a highly-ionized atmosphere a…
The initial conditions of isolated star formation - IX. Akari mapping of an externally heated pre-stellar core
Ward-Thompson, D.; Nutter, D.; Stamatellos, D.
We present observations of L1155 and L1148 in the Cepheus molecular cloud, taken using the Far Infrared Surveyor (FIS) instrument on the Akari satellite. We compare these data to submillimetre data taken using the Submillimetre Common-User Bolometer Array (SCUBA) camera on the James Clerk Maxwell Telescope, and far-infrared data taken with the ima…