A possible overall scenario for the outburst evolution of MAXI J1820+070 revealed by Insight-HXMT
| العنوان: | A possible overall scenario for the outburst evolution of MAXI J1820+070 revealed by Insight-HXMT |
|---|---|
| المؤلفون: | J Q Peng, S Zhang, Y P Chen, L D Kong, P J Wang, S N Zhang, L Ji, L Tao, J L Qu, M Y Ge, Q C Shui, J Li, Z Chang, Z S Li, Y X Xiao |
| المصدر: | Monthly Notices of the Royal Astronomical Society. 518:2521-2528 |
| بيانات النشر: | Oxford University Press (OUP), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Space and Planetary Science, Astronomy and Astrophysics |
| الوصف: | We study the spectral and temporal properties of the black hole X-ray transient binary MAXI J1820+070 during the 2018 outburst with Insight-HXMT observations. The outburst of MAXI J1820+070 can be divided into three intervals. For the two intervals of the outburst, we find that low-energy (below 140 keV) photons lag high-energy (140–170 keV) ones, while in the decay of the outburst, high-energy photons lag low-energy photons, both with a time-scale of the order of days. Based on these results, the canonical hysteresis effect of the ‘q’ shape in the hardness–intensity diagram can be reformed into a roughly linear shape by taking into account the lag corrections between different energy bands. Time analysis shows that the high-frequency break of hard X-rays, derived from the power-density spectrum of the first interval of the outburst, is in general larger and more variable than that of soft X-rays. The spectral fitting shows that the coverage fraction of the hard X-rays drops sharply at the beginning of the outburst to about 0.5, and then increases slightly. The coverage fraction drops to roughly zero once the source steps into soft state and increases gradually to unity when the source returns to low–hard state. We discuss the possible overall evolution scenario of corona hinted from these discoveries. |
| تدمد: | 1365-2966 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::085b43cec8d4421ab3ed530b92cc2f7b https://doi.org/10.1093/mnras/stac3238 |
| حقوق: | EMBARGO |
| رقم الأكسشن: | edsair.doi...........085b43cec8d4421ab3ed530b92cc2f7b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
|---|