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Inferring the composition of the liquid surface on Titan at the Huygens probe landing site from Surface Science Package measurements
Lorenz, R. D.; Hagermann, A.; Leese, M. R. +5 more
With Huygens’ descent into Titan’s atmosphere drawing nearer, the composition and state of Titan’s surface remained largely unknown. The idea of a global ocean on Titan has become less popular over the last decade, though the possibility of lakes and seas has remained, and recently [Campbell, D.B., Black, G.J., Carter, L.M., Ostro, S.J. Radar evid…
Diagnostics of the Heliospheric Interface: High Energy ENAs
Kallenbach, Reinald; Hilchenbach, Martin; Czechowski, Andrzej
Energetic neutral atoms (ENAs) detected near Earth's orbit in the energy range from a few to a few hundred keV/nucleon carry information about the ion acceleration and transport mechanisms in the distant heliosphere, processes that are sensitive to the magnetic field structure, turbulence, and the plasma flow pattern. We summarize here the ENA obs…
Performance verification of the Suzaku X-ray Spectrometer in the flight configuration
Ishisaki, Y.; Mitsuda, K.; Boyce, K. R. +12 more
The X-ray Spectrometer (XRS) is a high resolution, non-dispersive cryogenic detector on board the X-ray satellite, Suzaku (Astro-E2), which was successfully launched on July 10, 2005. The XRS achieves an energy resolution of 6 eV at 6 keV (FWHM) and covers a broad energy range of ∼0.07 10 keV. The XRS will enable powerful plasma diagnostics of a v…
An information-theoretical methodology for profile parameter estimation of solar coronal spectra
Nakagawa, A.
Aims.An attempt is made to establish an information-theoretical methodology for profile parameter estimation of the spectral lines of the solar corona.
Methods: .In this formalism, "description lengths" of a target line profile are defined for every possible profile model and are used to identify the optimal one among possible models. To prope…
Star formation in hosts of young radio galaxies
O'Dea, C. P.; Labiano, A.; Baum, S. A. +2 more
We present near ultraviolet imaging with the Hubble Space Telescope Advanced Camera for Surveys, targeting young radio galaxies (gigahertz peaked spectrum and compact steep spectrum sources), in search of star formation regions in their hosts. We find near UV light which could be the product of recent star formation in eight of the nine observed s…
Fourier-resolved spectroscopy of AGN using XMM-Newton data
Papadakis, I. E.; Kazanas, D.; Ioannou, Z.
% We present a brief account of the theory on which the novel method of `Fourier-resolved spectroscopy' is based. We summarize the results from the past application of this method to the study of Galactic Black Hole candidate sources and MCG-6-30-15, and we present new results from the Fourier-resolved spectroscopy of archival XMM-Newton data of f…
Simulation of post-impact rotational changes through multi-dimensional parametrization
Gauchez, Damien; Souchay, Jean
In this paper we propose firstly a full parametrization of an impact on a target body considered as ellipsoidal, including several geometrical parameters which are generally not included. Then we construct a more detailed and complete theoretical model of the rotational changes of the target body arising from a single impact, by taking into accoun…
Radar sounding of Mars from the orbit of the Mars-Express automatic interplanetary station
Smirnov, V. M.; Yushkova, O. V.; Chernaya, L. F. +1 more
On the base of the laser altimetry results obtained using the orbital altimeter MOLA (the MGS mission) and the data of radio occultation experiments of transionospheric sounding of the Mars ionosphere, a method for interpretation of the planet radar sounding data is developed. The proposed method includes a program package for numerical simulation…
Near-infrared observations of the carbon stars TU Geminorum and SS Virginis at milliarcsecond resolution
Chandrasekhar, T.; Richichi, A.
Aims.High-angular resolution investigations of carbon stars.
Methods. Milliarcsecond resolution observations in the near infrared K band by the method of lunar occultations are presented for the carbon stars
Results. Although a companion to
The Huygens probe—space history in many ways
Lebreton, Jean-Pierre; Schipper, Anne Marie
The European Space Agency's Huygens probe, developed under the prime contractorship of Alcatel Alenia Space, has on the 14th January 2005 arrived at its final destination, Saturn's largest Moon Titan. This event provides a major step in our solar system exploration activities and represents a significant contribution to the exploration of Titan, a…