Search Publications
Slit and integral-field optical spectroscopy of the enigmatic quasar HE 0450-2958
Magain, P.; Courbin, F.; Letawe, G.
Context: Interest in the quasar HE 0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations.
Aims: This article investigates the gaseous and stellar contents of the system through additional VLT/FORS slit spectra and integral field spectroscopy from VLT/VIMOS.
Methods: …
Two-stage oscillatory response of the magnetopause to a tangential discontinuity/vortex sheet followed by northward IMF: Cluster observations
Farrugia, C. J.; Kistler, L.; Mouikis, C. +11 more
We discuss the motion and structure of the magnetopause/boundary layer observed by Cluster in response to a joint tangential discontinuity/vortex sheet (TD/VS) observed by the Advanced Composition Explorer spacecraft on 7 December 2000. The observations are then supplemented by theory. Sharp polarity reversals in the east-west components of the fi…
Detection of a Rare Supersoft Outburst Event during a Suzaku Observation of 1E0102.2-7219
Miller, Eric D.; Maeda, Yoshitomo; Tsujimoto, Masahiro +4 more
We report on the detection of a transient X-ray source toward the Small Magellanic Cloud (SMC) using the X-ray Imaging Spectrometer (XIS) on board the Suzaku telescope. The source was detected at the edge of the XIS image during a routine observation of the calibration source 1E0102.2-7219, a supernova remnant in the SMC. We constrained the source…
The dynamical state of A548 from XMM-Newton data: X-ray and radio connection
Teyssier, R.; Govoni, F.; Giovannini, G. +5 more
Context: We present a detailed study of the X-ray properties of the galaxy cluster Abell 548b (z = 0.04), using XMM-Newton data, and discuss the connection between the thermal properties and the presence of two extended relic radio sources located at the cluster periphery.
Aims: We wish to analyze the dynamical state of the cluster and confirm…
Shock-related radio emission during coronal mass ejection lift-off?
Pohjolainen, S.
Aims: We identify the source of fast-drifting decimetric-metric radio emission that is sometimes observed prior to the so-called flare continuum emission. Fast-drift structures and continuum bursts are also observed in association with coronal mass ejections (CMEs), not only flares.
Methods: We analyse radio spectral features and images acquir…
Analysis of plasma waves observed in the inner Saturn magnetosphere
Gurnett, D. A.; Coates, A. J.; Hospodarsky, G. B. +3 more
Plasma waves observed in the Saturn magnetosphere provide an indication of the plasma population present in the rotationally dominated inner magnetosphere. Electrostatic cyclotron emissions often with harmonics and whistler mode emission are a common feature of Saturn's inner magnetosphere. The electron observations for a region near 5 RS
XMM-Newton observations of the Small Magellanic Cloud: X-ray outburst of the 6.85 s pulsar XTE J0103-728
Pietsch, W.; Haberl, F.
Context: A bright X-ray transient was seen during an XMM-Newton observation in the direction of the Small Magellanic Cloud (SMC) in October 2006.
Aims: The data from the European Photon Imaging Cameras (EPIC) allow us to accurately locate the source and to investigate its temporal and spectral behaviour.
Methods: We extracted X-ray spectra…
Analysis of the HASI accelerometers data measured during the impact phase of the Huygens probe on the surface of Titan by means of a simulation with a finite-element model
Bettanini, C.; Angrilli, F.; Zaccariotto, M.
The Huygens Atmospheric Structure Instrument (HASI) [Fulchignoni, M., Ferri, F., Angrilli, F., Bar-Nun, A., Barucci, M.A., Bianchini, G., Borucki, W., Coradini, M., Coustenis, A., Falkner, P., Flamini, E., Grard, R., Hamelin, M., Harri, A.M., Leppelmaier, G.W., Lopez-Moreno, J.J., McDonnell, J.A.M., McKay, C.P., Neubauer, F.M., Pedersen, A., Piaca…
Titan's surface from the Cassini RADAR radiometry data during SAR mode
Lorenz, R. D.; Janssen, M. A.; Lunine, J. I. +8 more
We present initial results on the calibration and interpretation of the high-resolution radiometry data acquired during the Synthetic Aperture Radar (SAR) mode (SAR-radiometry) of the Cassini Radar Mapper during its first five flybys of Saturn's moon Titan. We construct maps of the brightness temperature at the 2-cm wavelength coincident with SAR …
VLA and Effelsberg observations of the interstellar medium around the runaway star WR 124
Cichowolski, S.; Pineault, S.; Arnal, E. M. +1 more
Aims:We present very large array (VLA) and Effelsberg radio continuum and 21 cm H I line observations of the interstellar medium (ISM) surrounding the runaway star WR 124 and the nebula M 1-67. The H I data have been used to investigate the effects that a star with a strong stellar wind and a high peculiar velocity has on the ISM.
Methods: The…