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A Chinese-European Multiscale Mission: The Double Star Program
Cao, J. B.; Liu, Z. X.; Escoubet, P.
Stream-Field Interactions in the Magnetic Accretor AO Piscium
Hellier, Coel; van Zyl, Liza
UV spectra of the magnetic accretor AO Psc show absorption features for half the binary orbit. The absorption is unlike the wind-formed features often seen in similar stars. Instead, we attribute it to a fraction of the stream that overflows the impact with the accretion disk. Rapid velocity variations can be explained by changes in the trajectory…
New cluster candidates in the extended XMM Lockman Hole field
Finoguenov, A.; Streblyanska, A.; Hasinger, G. +2 more
We describe the results of a search for diffuse sources in the 0.4 deg 2 area of the XMM-Newton 770 ks survey of the Lockman Hole. An abundant population of sources is revealed, which is likely to stem from low-mass galaxy clusters at redshift near 1. We present the optical images in the K' and R-bands for our candidates, suggesting a c…
The Observational Evidence on the Loop Loop Interaction in a Flare CME Event on April 15, 1998
Huang, G. L.; Tang, Y. H.; Wu, G. P. +1 more
The evolution of the soft X-ray and EUV coronal loops related to the April 15, 1998 solar flare-CME event is studied with multiwavelength observations including hard X-rays (BATSE), microwaves (NoRP, CNAO) and magnetograms (SOHO/MDI), as well as images from Yohkoh/SXT and SOHO/EIT at 195 Å. It is shown that: (1) two soft X-ray and EUV loops rose, …
Observations of a Unique Cusp Signature at Low and Mid Altitudes
Winningham, J. D.; Balogh, A.; Fazakerley, A. N. +7 more
Observations of a unique cusp feature at low and mid altitudes are reported. This feature has a consistent double-peaked or “V”-shaped structure at the equatorward edge of high-latitude particle precipitation flux, and is predominantly present for high IMF By conditions. The observations are consistent with the Crooker (‘A split separat…
Planetary science: Are there active glaciers on Mars? (Reply)
Jaumann, R.; Head, J. W.; Neukum, G. +11 more
Gillespie et al. concur with our interpretation that certain lobate equatorial and mid-latitude features on Mars are due to debris-covered glaciers formed largely during past periods of increased spin-axis obliquity, when climate regimes favoured snow and ice accumulation and glacial flow. They suggest that the `hourglass' deposit, dated at more t…
The European Large Area ISO Survey
Oliver, Seb; Pozzi, Francesca
The European Large Area ISO Survey (ELAIS) was the largest Open Time survey on the Infrared Space Observatory (ISO). It was designed to explore obscured galaxies and hence quantify the recent star-formation history of the Universe. The final reanalysis of the data has been completed and a band-merged catalogue with associations across many wavelen…
Energetic Particles Observed in the CUSP Region During a Storm Recovery Phase
Reme, H.; Korth, A.; Daly, P. +4 more
In this paper we report energetic ion behavior and its composition variations observed by the Cluster/RAPID instrument when the spacecraft was travelling in the high latitude magnetospheric boundary region on the day of the 31 March, 2001, strongest magnetic storm in the past 50 years. The Dst index reached ‑360 nT at about 09:00 UT. During its ea…
Ultracool dwarf binaries
Bouy, H.; Bouvier, J.; Brandner, W. +1 more
We review here the multiplicity properties of ultracool dwarfs (spectral type later than M6) observed in three different environments and at three different ages: in the field, where the objects are relatively old (1-5 Gyrs) and isolated, in the Pleiades young (∼120 Myr) open cluster, and in the young (∼5 Myr) Upper Scorpius OB association (USco).…
Improvement of plasma measurements onboard Cluster due to spacecraft potential control
Escoubet, C. P.; Dandouras, I.; André, M. +6 more
The ion emitter experiment ASPOC (Active Spacecraft Potential Control) and the plasma electron experiment PEACE (Plasma Electron And Current Experiment) have been operating together in a large variety of plasma environments. Three cases on February 4, 2001, May 21, 2002, and June 12, 2002 have been analysed. A clear improvement of the electron mea…