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Understanding the relativistic accretion disk of GRS 1915 + 105
Belloni, Tomaso; Matt, Giorgio; Karas, Vladimír +2 more
We discuss the evidence for GRS 1915 + 105 hosting an optically thick, relativistic accretion disk (at least in some spectral phases). We give particular emphasis to the iron line phenomenology.
Detailed analyses of GRB 060105 X-ray afterglow observed by Suzaku
Yonetoku, D.; Yamauchi, M.; Yamaoka, K. +35 more
Turbulence and Ion Acceleration in the Outer Heliosphere
Wurz, Peter; Kallenbach, Reinald; Hilchenbach, Martin +1 more
The transport parameters of suprathermal and energetic particles in the heliosphere are intimately linked to the properties of the plasma turbulence in the supersonic solar wind flow and in the subsonic heliosheath plasma flow beyond the termination shock. Based on observations with the magnetometers on board the Helios, ACE, Ulysses, and Voyager …
Pulsating B Stars Discovered by HIPPARCOS
Poretti, E.; Musazzi, F.
The photometric properties of the variable stars located in the lower part of the classical instability strip are discussed. The importance of the determination of some light curve parameters and their connection with the stellar models are stressed, with a particular emphasis on large amplitude Delta Scuti stars.
A dichotomy in radio jet orientations
de Zeeuw, P. T.; Verdoes Kleijn, Gijs
We examine the relative orientations of radio jets, central dust and stars in low-power (i.e., FR I and FR I/II) radio galaxies. We use the position angles of jet and dust to constrain the three-dimensional angle θDJ between jet and dust. For galaxies with filamentary dust 'lanes' (which tend to be misaligned with the galaxy major axis)…
Autocorrelation and Fourier analysis of the Crimean and Hipparcos photometry of the runaway star HD 192281
Barannikov, A. A.
New B sbnd V sbnd R photoelectric photometry of the runaway star HD 192281 combined with Hipparcos observations of this star show a periodic brightness variation with a period of 67.385 days.
Background radiation effects and hazards in planetary instrumentation
Butcher, Gillian; Sims, Mark R.; Fraser, George +3 more
Recent and proposed future planetary missions are becoming increasingly concerned with detailed geochemical assessment, often in a bid to ascertain the presence of water and life supporting geochemical systems. The instruments involved may use some kind of radioactive source, e.g. X-ray fluorescence spectrometry, Mössbauer spectrometry, neutron sc…
Blazars and INTEGRAL
Pian, E.; Hudec, R.; Kubánek, P. +1 more
We refer to analysis of the ESA INTEGRAL satellite data for specific class of active galactic nuclei - blazars. These objects represent promising sources to be observed by INTEGRAL, especially during their active states. Suitable strategy for the future analysis is proposed and discussed.
Quasi-null lens optical system for the fabrication of an oblate convex ellipsoidal mirror: application to the Wide Angle Camera of the Rosetta space mission
Naletto, Giampiero; Ragazzoni, Roberto; da Deppo, Vania +2 more
The design of a quasi-null lens system for the fabrication of an aspheric oblate convex ellipsoidal mirror is presented. The Performance and tolerance of the system have been analyzed. The system has been applied successfully for the fabrication of the primary mirror of the Wide Angle Camera (WAC), the imaging system onboard the Rosetta, the Europ…
Discovery of a double peaked Fe emission line in the Cloverleaf quasar H 1413+117
Agol, E.; Dai, X.; Chartas, G. +2 more
Our spatial and spectral analysis of a recent deep Chandra observation of H 1413+117 confirms a microlensing event in a previous Chandra observation of this object performed about 5 years earlier. We present constraints on the structure of H 1413+117 based on the time-scale of this microlensing event. The analysis of the combined spectrum of the i…