Search Publications
The detection of diffuse emission in HCG 16 with XMM-Newton
Bourdin, H.; Ponman, T. J.; Sauvageot, J. -L. +1 more
We report results obtained from analysis of the XMM-Newton observation of the compact group of galaxies HCG 16. It is a peculiar system composed of 7 spirals, 6 of which are active, and its nature as a bound system has been much debated. The EPIC camera observations give new insights into the X-ray parameters describing the physical status of the …
Deep XMM-Newton observation of a northern LMC field I. Selected X-ray sources
Pietsch, W.; Haberl, F.; Dennerl, K.
First results from a deep XMM-Newton observation of a field in the Large Magellanic Cloud (LMC) near the northern rim of the supergiant shell LMC 4 are presented. Spectral and temporal analyses of a sample of selected X-ray sources yielded two new candidates for supernova remnants, a supersoft X-ray source and a likely high mass X-ray binary (HMXB…
The Dynamical Morphologies of Flares Associated with the Two Types of Solar Coronal Mass Ejections
Golub, Leon; Zhang, Mei
In this paper we study the high-cadence TRACE observations of a sample of 28 X- and M-class flares, with particular focus on the relation between flare morphology and the two types (fast and slow) of solar coronal mass ejections (CMEs). Among the 28 flares studied, 10 are associated with fast CMEs, 10 are associated with slow CMEs, and 8 are loose…
The mineralogy, geometry and mass-loss history of IRAS 16342-3814
Waters, L. B. F. M.; Dominik, C.; de Koter, A. +5 more
We present the 2-200 mu m Infrared Space Observatory (ISO) spectrum and 3.8-20 mu m ISAAC and TIMMI2 images of the extreme OH/IR star IRAS 16342-3814. Amorphous silicate absorption features are seen at 10 and 20 mu m, together with crystalline silicate absorption features up to almost 45 mu m. No other OH/IR star is known to have crystalline silic…
Statistical Characteristics of CMEs and Flares Associated with Solar Type II Radio Bursts
Moon, Y. -J.; Shanmugaraju, A.; Dryer, M. +1 more
We have made a comprehensive statistical study of the characteristics of 290 SOHO/LASCO CMEs and their associated GOES-8 X-ray flares (> C1 class) during the period January 1997-December 2000 of solar cycle 23's rise to maximum. These events were classified into mainly three groups (Group noII - not associated with type IIs, Group II - associat…
Plasma sheet structure during strongly northward IMF
Petrukovich, A. A.; Balogh, A.; Glassmeier, K. -H. +5 more
On 14 September 2001, under stongly northward IMF conditions Cluster registered several fast magnetic field polarity changes which are usually attributed to thin (near-equatorial) current sheet crossings. However, the IMF was northward for the previous 24 hours, the plasma sheet was expanded vertically, filled with cold, dense plasmas with high lo…
An XMM-Newton Observation of Nova LMC 1995: A Bright Supersoft X-Ray Source
Orio, Marina; Greiner, Jochen; Still, Martin +1 more
Nova LMC 1995, previously detected during 1995-1998 with ROSAT, was observed again as a luminous supersoft X-ray source with XMM-Newton in 2000 December. This nova offers the possibility to observe the spectrum of a hot white dwarf, burning hydrogen in a shell and not obscured by a wind or nebular emission as in other supersoft X-ray sources. Notw…
An HST study of three very faint GRB host galaxies
Fynbo, J. P. U.; Schaefer, B. E.; Gorosabel, J. +8 more
As part of the HST/STIS GRB host survey program we present the detection of three faint gamma-ray burst (GRB) host galaxies based on an accurate localisation using ground-based data of the optical afterglows (OAs). A common property of these three hosts is their extreme faintness. The location at which GRBs occur with respect to their host galaxie…
Mars Express-ESA's first mission to planet Mars
Schmidt, R.
ESA' Mars Express mission is a fully approved and funded project which has entered its spacecraft development (i.e. hardware) phase early January 2000. It is the first of ESA's new 'F' (flexible) missions which are based on a new implementation scenario to maintain overall mission cost below a stringent cost cap. The key features of an F-mission a…
Bow shock motions observed with CLUSTER
André, M.; Maksimovic, M.; Bale, S. D. +1 more
The Cluster mission allows the determination not only of the bow shock crossing position but also, with a simple timing method and a reasonable confidence, the shock normal and the velocity along this normal. We apply this technique to a series of eleven consecutive bow shock crossings which occurred during a time interval of approximatively two a…