تقرير
The Chaotic Long-term X-ray Variability of 4U 1705--44
| العنوان: | The Chaotic Long-term X-ray Variability of 4U 1705--44 |
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| المؤلفون: | Phillipson, Rebecca A., Boyd, Patricia T., Smale, Alan P. |
| المصدر: | R A Phillipson, P T Boyd, A P Smale, The chaotic long-term X-ray variability of 4U 1705-44, Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 4, 11 July 2018, Pages 5220-5237 |
| سنة النشر: | 2018 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | The low-mass X-ray binary 4U1705-44 exhibits dramatic long-term X-ray time variability with a timescale of several hundred days. The All-Sky Monitor (ASM) aboard the Rossi X-ray Timing Explorer (RXTE) and the Japanese Monitor of All-sky X-ray Image (MAXI) aboard the International Space Station together have continuously observed the source from December 1995 through May 2014. The combined ASM-MAXI data provide a continuous time series over fifty times the length of the timescale of interest. Topological analysis can help us identify 'fingerprints' in the phase-space of a system unique to its equations of motion. The Birman-Williams theorem postulates that if such fingerprints are the same between two systems, then their equations of motion must be closely related. The phase-space embedding of the source light curve shows a strong resemblance to the double-welled nonlinear Duffing oscillator. We explore a range of parameters for which the Duffing oscillator closely mirrors the time evolution of 4U1705-44. We extract low period, unstable periodic orbits from the 4U1705-44 and Duffing time series and compare their topological information. The Duffing and 4U1705-44 topological properties are identical, providing strong evidence that they share the same underlying template. This suggests that we can look to the Duffing equation to help guide the development of a physical model to describe the long-term X-ray variability of this and other similarly behaved X-ray binary systems. Comment: 18 pages, 17 figures, Published to MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/sty970 |
| URL الوصول: | http://arxiv.org/abs/1809.06393 |
| رقم الأكسشن: | edsarx.1809.06393 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/sty970 |
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