Double-peaked thermonuclear bursts at the soft–hard state transition in the Rapid Burster
| العنوان: | Double-peaked thermonuclear bursts at the soft–hard state transition in the Rapid Burster |
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| المؤلفون: | Anna L. Watts, J. J. M. in 't Zand, Alessandro Patruno, T. Bagnoli |
| المساهمون: | High Energy Astrophys. & Astropart. Phys (API, FNWI) |
| المصدر: | Monthly Notices of the Royal Astronomical Society, 437(3), 2790-2801. Oxford University Press |
| بيانات النشر: | Oxford University Press (OUP), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Thermonuclear fusion, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy, Polar, Astronomy and Astrophysics, Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Accretion (astrophysics) |
| الوصف: | Long suspected to be due to unstable accretion events, the type II bursts exhibited by the Rapid Burster (RB, or MXB 1730-335) still lack an exhaustive explanation. Apart from type II bursts, the transient RB also shows the better-understood thermonuclear shell flashes known as type I bursts. In search of links between these two phenomena, we carried out a comprehensive analysis of all $\textit{Rossi X-ray Timing Explorer}$ observations of the RB and found six atypical type I bursts, featuring a double-peaked profile that is not due to photospheric radius expansion. The bursts appear in a phase of the outburst decay close to the onset of the type II bursts, when the source also switches from the high/soft to the low/hard state. We also report the discovery of a simultaneous low-frequency quasi-periodic oscillation present in the persistent emission as well as in the burst decaying emission. We discuss several scenarios to understand the nature of the peculiar bursts and of the accompanying oscillation, as well as their possible relation with each other and with the type II burst phenomenon. We favour a model consisting of two accretion channels, one polar and one equatorial, in a source viewed at low inclination. We also, for the first time, clearly identify the atoll nature of the RB. Comment: accepted by MNRAS |
| وصف الملف: | application/pdf |
| تدمد: | 1365-2966 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c377c60d2b2365652ebd623e54c8cf2d https://doi.org/10.1093/mnras/stt2088 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c377c60d2b2365652ebd623e54c8cf2d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
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