“X射线天文学60周年及中国X射线天文研究”研讨会：时域与多信使天文学时代的X射线天文研究

Session

Session I

16 Jun 2022, 09:00

Conveners

Session I

• Chair: 李向东 ()

Contribution list Timetable

28. X-ray view of galaxies near and far

Daniel Wang (U)

16/06/2022, 09:00

I'll give a brief personal overview of X-ray source populations seen in nearby and very distant galaxies.

67. The outflowing corona in MAXI J1820+070

游贝 (Wuhan University)

16/06/2022, 09:25

A black hole X-ray binary (BHXRB) produces hard X-ray radiation from its corona and disk when the accreted matter heats up. During an outburst, the disk and corona co-evolves with each other. However, such an evolution is still unclear in both its geometry and dynamics. Here we report the unusual decrease of the reflection fraction in MAXI J1820+070, which is the ratio of the coronal intensity...

79. MAXIJ1820+070爆发的高能QPO和进动喷流

马想 (IHEP)

16/06/2022, 09:40

23. 黑洞吸积盘的辐射磁流体力学数值模拟

黄佳辉 (æ)

16/06/2022, 09:55

黑洞X射线双星的吸积过程涉及复杂的磁流体过程，需要借助数值模拟来理解其物理本质。我们进行了一个围绕7倍太阳质量黑洞周围吸积盘的三维辐射磁流体数值模拟，吸积率范围是从1%到接近临界值。在所有的模拟中，由磁旋转不稳定性导致的湍流造成了角动量的转移，最终形成了稳定的吸积盘结构。模拟在10 rg处的没有显示出明显的热不稳定性。我们发现吸积盘的纵向结构都由磁压梯度支撑，并且磁压的模拟值和磁压主导吸积盘模型的理论值相符。在近临界吸积模拟中，旋转轴附近的漏斗形区域内产生了速度为0.1倍光速左右的外流，这与X射线双星观测到的高速外流一致；外流速度的峰值出现在旋转轴附近，但外流携带质量流的峰值则出现在漏斗状区域的边缘处。

34. A particular stellar-mass black hole GRS 1915+105: 15 years of X-ray and radio monitoring

张亮 (Ihep)

16/06/2022, 10:10

GRS 1915+105 is a particular stellar-mass black hole in a binary system. This source has been active since its discovery in 1992, and shows complex timing and spectral properties that are quite different from other black hole binaries. We collected 15 years of data from RXTE (X-ray) and Ryle (radio) telescope to reveal a strong correlation between (i) the radio flux that comes from the jet and...

46. Low Frequency Quasi-periodic Oscillations in MAXI J1820+070: Evidence for both Comptonization and Reflection contributions

高晨旭 (Shanghai Astronomical Observatory)

16/06/2022, 10:25

Low Frequency (LF) quasi-periodic oscillations (QPOs) of black hole X-ray binaries, especially the C-type LF QPOs seen in many black hole transients during outbursts, are representative timing signals of black hole low/hard state and intermediate state. The most popular model for the C-type LF QPOs is the Lense-Thirring precession model, which attributes the QPO as due to the precession of a...