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        A comparative analysis of disruptive type-I X-ray bursts with non-monotonic decays

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        Publication date
        2017
        Author
        Kries, M.J.W.
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        Summary
        Previously, only 5 type-I X-ray bursts with variability in the burst decay were known. During a systematic search through the archive of automatically observed triggers of the Swift X-ray observatory, 3 additional bursts were found that show strong variability ($\sim$70\% amplitude), making a total of 8 bursts that show this behaviour. 4 bursts that were observed with Swift (one of which was already known to show variability) are discussed in detail and compared with 4 previously known bursts. We find many similarities. They are likely all ultra compact X-ray binaries, the bursts are all intermediate duration bursts and probably have superexpansion. We speculate that the fluctuations and eclipse-like features are caused by a resettling accretion disk that was disrupted by the effects of super-Eddington fluxes, including an expanding shell and a strong radiation pressure.
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        https://studenttheses.uu.nl/handle/20.500.12932/26201
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