AE Aquarii: how cataclysmic variables descend from supersoft binaries
نویسندگان
چکیده
منابع مشابه
Aquarii : how CVs descend from supersoft binaries
AE Aquarii is a propeller system. It has the shortest spin period among cataclysmic variables, and this is increasing on a 10 yr timescale. Its UV spectrum shows very strong carbon depletion vs nitrogen and its secondary mass indicates a star far from the zero–age main sequence. We show that these properties strongly suggest that AE Aqr has descended from a supersoft X–ray binary. We calculate ...
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Recent observations, reported by Warner and Woudt, of Dwarf Nova Oscillations (DNOs) exhibiting frequency drift, period doubling, and 1:2:3 harmonic structure, can be understood as disc oscillations that are excited by perturbations at the spin frequency of the white dwarf or of its equatorial layers. Similar quasi-periodic disc oscillations in black hole low-mass X-ray binary (LMXB) transients...
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We have observed the cataclysmic variable AE Aqr for a total of 68.7 hours over the epoch 1991-95 using the Whipple Observatory 10 m gamma-ray telescope. An analysis of these data has revealed no evidence for any steady, pulsed or episodic TeV emission. We have calculated an upper limit for steady emission of 4.0 x lo-‘* photons cm-‘s-l at an energy threshold of 900 GeV. This is three orders of...
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The DQ Her type cataclysmic variable AE Aquarii was observed with the rst Cerenkov imaging telescope of the projected HEGRA ve telescope array in August and September 1994. A naive analysis using the false source method yielded no evidence of an un-pulsed VHE -ray ux or of large scale are activity. The results of a test for periodicity in the 34 s to 16 s region will be available in due course.
متن کاملFireball Models for Flares in AE Aquarii
We examine the flaring behaviour of the cataclysmic variable AE Aqr in the context of the ‘magnetic propeller’ model for this system. The flares are thought to arise from collisions between high density regions in the material expelled from the system after interaction with the rapidly rotating magnetosphere of the white dwarf. We calculate the first quantitative models for the flaring and calc...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2002
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2002.05999.x