Search Publications
Detection of thermal X-ray emission in the halo of the plerionic supernova remnant G21.5-0.9
Bocchino, F.
The detection of a soft thermal X-ray component in the spectrum of a bright knot in the halo of the plerion G21.5-0.9 is reported. Using a collisional ionization equilibrium model for an hot optically thin plasma, a temperature of kT 0.12-0.24 keV, a mass of 0.3-1.0 M⊙ and a density of 1.6-6 cm -3 is derived. The spectral ana…
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…
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…
First observations of the planetary Fourier spectrometer at Mars
Piccioni, G.; Grassi, D.; Khatuntsev, I. +8 more
The first results of the Planetary Fourier Spectrometer (PFS) orbiting the planet Mars are reviewed and discussed here, with reference to a set of studies being published elsewhere. An average global spectrum ranging from 200 to 8200 cm -1 is discussed by comparing it to the ISO SWS Martian spectrum and to the global synthetic spectrum …
Study of the structure of abell 3571: An XMM-Newton view
Hudaverdi, M.; Furuzawa, A.; Yamashita, K.
The non-uniform temperature and abundance distribution in the central region of A3571 is investigated. Our previous analysis of ASCA data suggested that the cluster experiences a relatively large scale group infall. By the advantage of XMM-Newton's high angular resolution, we are able to investigate dynamical structures down to the 100 kpc scale. …
Thermal structure of the Martian atmosphere retrieved from the IR spectrometry in the 15 µm CO2 band: input to MIRA
Grassi, D.; Zasova, L. V.; Formisano, V. +2 more
This paper describes one of the sources of the data concerning the thermal structure of the Martian atmosphere, based on the thermal IR spectrometry method. It allows to investigate the Martian atmosphere below 55 km by retrieving the temperature profiles from the 15 µm CO2 band. This approach enables to reach the vertical resolut…
ASCA and XMM-Newton observations of A2029
Hudaverdi, M.; Furuzawa, A.; Yamashita, K. +4 more
The X-ray data of A2029 obtained with XMM-Newton show no evidence of an embedded AGN in the central region of this cluster, which was suggested from the analysis of restored ASCA image data, although some hot spots are seen within or around the central cD galaxy. The absence of AGN at the cluster center is consistent with the result of Chandra obs…
A first XMM-Newton look at the most X-ray-luminous galaxy cluster RX J1347.5 1145
Gitti, Myriam; Schindler, Sabine
We present the first results from an XMM-Newton observation of RX J1347.5 1145 (Z = 0.451), the most luminous X-ray cluster of galaxies currently known, with a luminosity LX = 6.0 ± 0.1 × 1045 erg s-1 in the (2 10) keV energy band. The cluster has an overall temperature of kT = 10.0 ± 0.3 keV and is not isothermal:…
What is Cluster telling us about magnetotail dynamics?
Nakamura, Rumi; Baumjohann, Wolfgang
In this review, we report on some new aspects of magnetotail dynamics found in the data of the first traversal of the magnetotail by the Cluster quartet in summer and autumn 2001: (1) The electron drift instrument made the first direct measurements of tail lobe convection. The statistical data shows convection toward the center of the plasma sheet…
Energetic particle acceleration during a major magnetic storm
Grande, M.; Baker, D.; Blake, J. B. +6 more
We study the global properties of energetic (>30 keV) particles during the main and early recovery phase of a major magnetic storm of March 31, 2001, using data of the NOAA 15 and 16 and the CLUSTER satellites. During the storm main phase the ring current energetic electron and ion fluxes were increased by nearly two orders of magnitude, and th…