تقرير
The Spectral-Timing Analysis of Cygnus X-1 With Insight-HXMT
| العنوان: | The Spectral-Timing Analysis of Cygnus X-1 With Insight-HXMT |
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| المؤلفون: | M Zhou, V Grinberg, Q -C Bu, A Santangelo, F Cangemi, C M Diez, O König, L Ji, M A Nowak, K Pottschmidt, J Rodriguez, J Wilms, S Zhang, J -L Qu, S -N Zhang |
| المصدر: | Astronomy & Astrophysics. 666 |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | Cygnus X-1, as the first discovered black hole binary, is a key source for understanding the mechanisms of state transitions, and the scenarios of accretion in extreme gravity fields. We present a spectral-timing analysis of observations taken with the Insight-HXMT mission, focusing on the spectral-state dependent timing properties in the broad energy range of 1–150 keV, thus extending previous RXTE-based studies to both lower and higher energies. Our main results are the following: a) We successfully use a simple empirical model to fit all spectra, confirming that the reflection component is stronger in the soft state than in the hard state; b) The evolution of the total fractional root mean square (rms) depends on the selected energy band and the spectral shape, which is a direct result of the evolution of the power spectral densities (PSDs); c) In the hard/intermediate state, we see clear short-term variability features and a positive correlation between central frequencies of the variability components and the soft photon index Γ(sub 1), also at energies above 15 keV. The power spectrum is dominated by red noise in the soft state instead. These behaviors can be traced to at least 90 keV; d) The coherence and the phase-lag spectra show different behaviors dependent on different spectral shapes. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1432-0746 0004-6361 |
| DOI: | 10.1051/0004-6361/202244240 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20220014059 |
| ملاحظات: | 80GSFC21M0002 CSC 202006100027 NKPOC 2021YFA0718500 NSFC U1838201 NSFC U1838202 |
| رقم الأكسشن: | edsnas.20220014059 |
| قاعدة البيانات: | NASA Technical Reports |
| تدمد: | 14320746 00046361 |
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| DOI: | 10.1051/0004-6361/202244240 |