Search Publications
HD 131861, a Double-Line Spectroscopic Triple System
Henry, Gregory W.; Pourbaix, D.; Fekel, Francis C. +1 more
Our red-wavelength spectroscopic observations of HD 131861, a previously known single-line multiple system, span 20 years. Now lines of two components, the short-period F5 V primary and G8 V secondary, have been detected. The inner orbit is circular with a period of 3.5507439 days, while the outer orbit of the system has a period of 1642 days or 4…
The Bright Ages Survey. I. Imaging Data
Salim, Samir; Rich, R. Michael; Frogel, Jay A. +3 more
This is the first paper in a series presenting and analyzing data for a K-selected sample of galaxies collected in order to identify and study galaxies at moderate to high redshift in rest-wavelength optical light. The sample contains 842 objects over six separate fields covering 75.6 arcmin2 down to K=20-20.5. We combine the K band wit…
Ground calibration of the XRS microcalorimeter onboard Suzaku
Ishisaki, Y.; Mitsuda, K.; Boyce, K. R. +13 more
The XRS microcalorimeter was launched in July 2005 as part of the Suzaku mission. It covers the energy band from 0.3 to 10 keV with a nearly constant energy resolution of 6 eV and a peak effective area of 200 cm 2 at 1.5 keV. The XRS will provide unprecedented throughput and resolving power, particularly at high energies and for extende…
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…