منابع مشابه
Observational Studies of Early-type Binary Stars: MP Centauri
We present photometric and spectroscopic data on the early-type binary MP Centauri. The photometric data are analyzed simultaneously with radial velocities to derive preliminary absolute dimensions for the binary components. Analysis of the spectra shows that the stars rotate synchronously and that the line of sight to the system crosses two kinematically sharp and well-separated interstellar r...
متن کاملSv-rings and Sv-porings
SV-rings are commutative rings whose factor rings modulo prime ideals are valuation rings. SV-rings occur most naturally in connection with partially ordered rings (= porings) and have been studied only in this context so far. The present note first develops the theory of SV-rings systematically, without assuming the presence of a partial order. Particular attention is paid to the question of a...
متن کاملFormation of terrestrial planets in close binary systems : the case of α Centauri A
At present the possible existence of planets around the stars of a close binary system is still matter of debate. Can planetary bodies form in spite of the strong gravitational perturbations of the companion star? We study in this paper via numerical simulation the last stage of planetary formation, from embryos to terrestrial planets in the α Cen system, the prototype of close binary systems. ...
متن کاملNear-simultaneous X-ray and optical observations of the RS Canum Venaticorum binary SV Camelopardalis
Wereport on amulti-wavelength campaign of optical and X-ray observations of the short-period eclipsing RS CVn binary star SV Cam. We present an X-ray light curve measured by ROSAT in Aug. 93, two V -band light curves obtained in Sep. and Nov. 93, and Doppler imagery based on high-resolution spectroscopy of photospheric absorption lines observed Sep.–Nov. 93. The total X-ray output of the SV Cam...
متن کاملEscape of VHE gamma-rays from close massive binary Centauri X-3
We consider propagation of very high energy (VHE) gamma-rays in the radiation field of a massive star in the binary system Cen X-3, which has been reported as a source of gammaray photons in the GeV and TeV energies. VHE gamma-rays or electrons, injected by the compact object, should develop inverse Compton e± pair cascades. Based on the Monte Carlo simulations we predict the γ-ray spectra and ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1992
ISSN: 0074-1809
DOI: 10.1017/s0074180900122508