منابع مشابه
Wind-wind collision in the η Carinae binary system: a shell-like event near periastron
The exact nature of η Carinae is still an open issue. Strict periodicity in the light curves at several wavelengths seem to point out to a binary system, but the observed radial velocities, measured from space with high spatial resolution are in conflict with the ground based observations used to calculate the binary orbit. Also, the observed 2-10 keV X-ray flux is much larger that what is expe...
متن کاملFacile electrochemical characterization of core/shell nanoparticles. Ag core/Ag(2)O shell structures.
We report in this paper a facile approach for the formation and electrochemical characterization of silver-silver oxide core-shell nanoparticles (NPs). Thus, thermal treatment at temperatures between 200 and 360 degrees C of Ag NP, in the gas phase or in an organic solvent, has been used to achieve the formation Ag@Ag2O NP. The evidence of formation of such a core-shell structure was obtained b...
متن کاملAccretion by the Secondary in Eta Carinae during the Spectroscopic Event: I. Flow Parameters
We examine the influence of the gravity of the companion (the secondary) to the massive primary star η Carinae on the winds blown by the primary and the secondary. The two winds collide with each other after passing through two respective shock waves, and escape the system while strongly emitting in the X-ray band. While during most of the 5.5 years orbital period, the companion’s gravity has a...
متن کاملPrediction for the He I Λ10830å Absorption Wing in the Coming Event of Eta Carinae
We propose an explanation to the appearance of a wide blue absorption wing in the He I λ10830Å P Cygni profile of the massive binary star η Car several months before periastron. We assume that the mixing regions of the two wind is accelerated by the secondary’s wind to ∼ 1800 km s, and is responsible for the absorption. We also assume that the secondary star is toward the observer at periastron...
متن کاملEffect of Ag Templates on the Formation of Au-Ag Hollow/Core-Shell Nanostructures
Au-Ag alloy nanostructures with various shapes were synthesized using a successive reduction method in this study. By means of galvanic replacement, twined Ag nanoparticles (NPs) and single-crystalline Ag nanowires (NWs) were adopted as templates, respectively, and alloyed with the same amount of Au(+) ions. High angle annular dark field-scanning TEM (HAADF-STEM) images observed from different ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1983
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/205.3.577