منابع مشابه
Tev Emission from Close Binaries
It is commonly accepted that candidates for very high energy-ray sources are neutron stars, binary systems, black holes etc. Close binary systems containing a normal hot star and a neutron star (or a black hole) form an important class of very high energy-ray sources. Such systems are variable in any region of the electromagnetic spectrum and they enable us to study various stages of stellar ev...
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Rotational mixing is a very important but uncertain process in the evolution of massive stars. We propose to use close binaries to test its efficiency. Based on rotating single stellar models we predict nitrogen surface enhancements for tidally locked binaries. Furthermore we demonstrate the possibility of a new evolutionary scenario for very massive (M > 40M ) close (P < 3 days) binaries: Case...
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We present an overview of pulsating stars in close binaries, focusing on the question what role the dupliticity plays in triggering and/or modifying stellar oscillations and on how it can help us to interpret the oscillatory behaviour of (one of) the components. We give examples of characteristic types of oscillations observed in binaries: forced oscillations and free oscillations in both, shor...
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High-resolution spectroscopic observations were obtained for two eclipsing active close binary systems, GK Hy-drae and TY Pyxidis. For GK Hya excess emission was observed in the Balmer lines and Mg i b lines while TY Pyx showed excess emission in the Balmer lines and Ca ii H & K lines. The emission from GK Hya arises from a global phenomenon associated solely with the secondary component. The l...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2013
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s174392131500558x