The thermal-radiative wind in low-mass X-ray binary H1743-322 ; II. Iron line predictions from Monte Carlo radiation transfer
The thermal-radiative wind in low-mass X-ray binary H1743-322 ; II. Iron line predictions from Monte Carlo radiation transfer
复制标题
低质量X射线双星H1743-322中的热辐射风；
DOI：
10.1093/mnras/staa961
复制
发表时间：
2020
影响因子：
4.8
通讯作者：
Takahashi Tadayuki
中科院分区：
文献类型：
--
作者：
Tomaru Ryota;Done Chris;Ohsuga Ken;Odaka Hirokazu;Takahashi Tadayuki
我们展示了目前对双星系统外吸积盘x射线照射产生的热辐射风预测的吸收和发射特征的最佳模拟。我们使用从辐射流体力学代码导出的密度和速度结构作为蒙特卡罗辐射输运计算的输入。初始条件与黑洞双星系统H1743−322的软盘主导状态相匹配，在chandragrating数据中可以看到风的特征。我们的模拟与观测到的线轮廓吻合得很好，表明这些物理风模型可以是所见吸收特征的起源，而不是需要磁力驱动的风。我们展示了速度结构如何成为磁风和热风之间关键的可观测鉴别器。磁风在较小的半径处速度更快，而热风在较小的半径处转变为静态大气。来自xrism（定于2022年1月发射）的新数据将为风发射和加速过程的物理学提供前所未有的视角，但小型圆盘系统中静态大气的存在已经排除了磁风的可能性，磁风假设整个圆盘的自相似磁场是所见吸收特征的起源。
We show the best current simulations of the absorption and emission features predicted from thermal-radiative winds produced from X-ray illumination of the outer accretion disc in binary systems. We use the density and velocity structure derived from a radiation hydrodynamic code as input to a Monte Carlo radiation transport calculation. The initial conditions are matched to those of the black hole binary system H1743−322 in its soft, disc dominated state, where wind features are seen inChandragrating data. Our simulation fits well to the observed line profile, showing that these physical wind models can be the origin of the absorption features seen, rather than requiring a magnetically driven wind. We show how the velocity structure is the key observable discriminator between magnetic and thermal winds. Magnetic winds are faster at smaller radii, whereas thermal winds transition to a static atmosphere at smaller radii. New data fromXRISM(due for launch 2022 January) will give an unprecedented view of the physics of the wind launch and acceleration processes, but the existence of static atmospheres in small disc systems already rules out magnetic winds which assume self-similar magnetic fields from the entire disc as the origin of the absorption features seen.