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PFS: an effective instrument for the study of martian environment
Grassi, D.; Formisano, V.; Maturilli, A. +2 more
We present here an evaluation of basic PFS sounding capabilities; results refer to the analysis of a single, calibrated spectrum. PFS is an infrared Fourier spectrometer on board of Mars Express mission. It covers the thermal infrared (250-1750 cm -1) with a resolution of 1.5 cm -1, as well as the near infrared (2000-8200 cm …
Elemental composition and distribution in SNRs: X-ray spectroscopy
Decourchelle, A.
I present a comparative review focusing on three young Supernova Remnants, Cas A, Tycho and Kepler, in the light of recent X-ray observations obtained with the XMM-Newton and Chandra satellites. Recently available, X-ray spectro-imagery of young Supernova Remnants is providing unique information on the interaction region between the ejected materi…
Stellar kinematics in the centers of globular clusters
Gerssen, J.
The high central stellar densities in globular clusters provide a unique environment to study the fundamental dynamical process of two-body relaxation. This process is the main driver of the dynamical evolution in the center of a globular cluster and has a profound effect on the structure of the cluster and on its stellar environment. We have obta…
Erratum: Probable intermediate-mass black holes in NGC 4559: XMM-Newton spectral and timing constraints
Cropper, Mark; Soria, Roberto; Wu, Kinwah +3 more
Sicily 2002 balloon campaign: a test of the HASI instrument
Fulchignoni, M.; Colombatti, G.; Ferri, F. +9 more
A mock-up of the probe descending in the Titan atmosphere as part of the Huygens Cassini Mission was successfully launched and recovered on 30th May 2002 after a stratospheric balloon launch from the Italian Space Agency Base "Luigi Broglio" in Trapani, Sicily. To simulate the Huygens mission at Titan, the probe was lifted to an altitude of 32 km …
Deep surveys of the obscured universe: GOODS
Chatzichristou, E. T.; Goods Team
Astronomy in the next decade will be dominated by multi-wavelength surveys which address a wide variety of scientific issues including galaxy formation and evolution, AGN structure and demographics and galactic structure. The great observatories origins deep survey (GOODS) is a deep multi-wavelength public survey of two of the deepest fields ever …
Dust production in supernovae
Dunne, L.; Eales, S.; Ivison, R. +2 more
The question `Are supernovae important sources of dust?' is a contentious one. Condensation theory and observations of dust at very high redshifts suggests that they should be, since only massive stars evolve quickly enough to produce the large quantities of dust seen at such early times in the Universe. However, observations with IRAS and ISO hav…
Sgr A East and its surroundings observed in X-rays
Decourchelle, A.; Warwick, R. S.; Sakano, M.
We report the results of an XMM-Newton observation of Sgr A East and its surroundings. The X-ray spectrum of Sgr A East is well represented with a two-temperature plasma model with temperatures of ∼1 and ∼4 keV. Only the iron abundance shows clear spatial variation; it concentrates in the core of Sgr A East. The derived plasma parameters suggest t…
Far Ultraviolet Spectroscopic Explorer Observations of the Dwarf Nova SW Ursae Majoris during Quiescence
Raymond, J. C.; Lobel, A.; Menou, K. +1 more
We present spectroscopic observations of the short-period cataclysmic variable SW UMa obtained by the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite while the system was in quiescence. The data include the resonance lines of O VI at 1031.91 and 1037.61 Å. These lines are present in emission, and they exhibit both narrow (~150 km s-1<…
HST and VLT observations of isolated neutron stars
Caraveo, P. A.; de Luca, A.; Mignani, R. P. +1 more
New results of optical observations of isolated pulsars and their environments are presented. Very Large Telescopes observations of PSR J0108-1431 set an upper limit of B~=28.6 on its optical flux, implying a neutron star surface temperature T<8.8×104 K (for d=200 pc, R∞=13 km). HST proper motion measurement of the PSR 192…