An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8-1613
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| author | Wei, Min Ma, Xiang Zhang, Liang Li, Xiang-Hua Ge, Ming-Yu Tao, Lian Qu, Jin-Lu Zhang, Shuang-Nan Zhang, Shu Song, Li-Ming Ma, Rui-Can Yang, Zi-Xu Huang, Yue Li, Pan-Ping Cao, Jia-Ying Zhao, Shu-Jie Zhao, Qing-Chang Xiao, Yun-Xiang Huang, Guo-Li |
| author_facet | Wei, Min Ma, Xiang Zhang, Liang Li, Xiang-Hua Ge, Ming-Yu Tao, Lian Qu, Jin-Lu Zhang, Shuang-Nan Zhang, Shu Song, Li-Ming Ma, Rui-Can Yang, Zi-Xu Huang, Yue Li, Pan-Ping Cao, Jia-Ying Zhao, Shu-Jie Zhao, Qing-Chang Xiao, Yun-Xiang Huang, Guo-Li |
| contents | We present a detailed analysis of the evolution of type-C quasiperiodic oscillations (QPOs) observed during the flaring state of the recently discovered black hole X-ray binary Swift J1727.8-1613, utilizing data from the Insight Hard X-ray Modulation Telescope. By examining the relation between the QPO fractional rms amplitude and QPO frequency across various energy bands, we discover that the behavior significantly differs between these energy bands. Below 10 keV, the QPO fractional rms generally decreases with increasing QPO frequency, whereas above 10 keV, the QPO fractional rms remains relatively stable with frequency. Additionally, we report, for the first time, the detection of a common break at around 4 Hz in the relation between QPO fractional rms and frequency in both the 2-4 and 50-100 keV energy bands. We also find that the evolution of all the spectral parameters alters its behavior at around 4 Hz, with the changes in all parameters becoming flatter. This suggests a significant change in the geometry of the accretion flow. We attribute the observed break to the overall changes in the spectrum. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_05735 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8-1613 Wei, Min Ma, Xiang Zhang, Liang Li, Xiang-Hua Ge, Ming-Yu Tao, Lian Qu, Jin-Lu Zhang, Shuang-Nan Zhang, Shu Song, Li-Ming Ma, Rui-Can Yang, Zi-Xu Huang, Yue Li, Pan-Ping Cao, Jia-Ying Zhao, Shu-Jie Zhao, Qing-Chang Xiao, Yun-Xiang Huang, Guo-Li High Energy Astrophysical Phenomena We present a detailed analysis of the evolution of type-C quasiperiodic oscillations (QPOs) observed during the flaring state of the recently discovered black hole X-ray binary Swift J1727.8-1613, utilizing data from the Insight Hard X-ray Modulation Telescope. By examining the relation between the QPO fractional rms amplitude and QPO frequency across various energy bands, we discover that the behavior significantly differs between these energy bands. Below 10 keV, the QPO fractional rms generally decreases with increasing QPO frequency, whereas above 10 keV, the QPO fractional rms remains relatively stable with frequency. Additionally, we report, for the first time, the detection of a common break at around 4 Hz in the relation between QPO fractional rms and frequency in both the 2-4 and 50-100 keV energy bands. We also find that the evolution of all the spectral parameters alters its behavior at around 4 Hz, with the changes in all parameters becoming flatter. This suggests a significant change in the geometry of the accretion flow. We attribute the observed break to the overall changes in the spectrum. |
| title | An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8-1613 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.05735 |