The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations
The thermal-radiative wind in low-mass X-ray binary H1743-322: radiation hydrodynamic simulations
复制标题
低质量 X 射线双星 H1743-322 中的热辐射风：辐射流体动力学模拟
DOI：
10.1093/mnras/stz2738
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发表时间：
2019
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;Nomura Mariko;Takahashi Tadayuki
蓝移的吸收线被认为是在高倾角黑洞双星系统在其盘主导的状态，显示这些权力的赤道盘风。虽然磁风仍有可能产生一些影响，但预计会出现热风和热辐射风。我们从辐射流体动力学模拟结果表明，从原子功能（束缚自由和线）的附加辐射力是重要的沿着与电子散射。这些都增加了高倾角下的风速，因此它们在数量上与H1743−322的观测结果相匹配，而不像纯粹的热成风那样太慢。我们强调的阴影外盘（次网格）内盘康普顿加热层所发挥的作用，并表明，增加阴影从较高的康普顿温度后，光谱过渡到硬态导致强烈的抑制风。热辐射风解释了这个最简单的风系统中的所有光谱特征（以及它们的消失），磁风只起次要作用。我们推测，热辐射风可以解释更复杂（更大的圆盘尺寸）的双星GRO J1655−40和GRS 1915+105的所有光谱特征，而不需要磁风。
Blueshifted absorption lines are seen in high inclination black hole binary systems in their disc-dominated states, showing these power an equatorial disc wind. While some contribution from magnetic winds remain a possibility, thermal and thermal-radiative winds are expected to be present. We show results from radiation hydrodynamic simulations that show that the additional radiation force from atomic features (bound–free and lines) is important along with electron scattering. Together, these increase the wind velocity at high inclinations, so that they quantitatively match the observations in H1743−322, unlike purely thermal winds that are too slow. We highlight the role played by shadowing of the outer disc from the (subgrid) inner disc Compton heated layer, and show that the increase in shadow from the higher Compton temperature after the spectral transition to the hard state leads to strong suppression of the wind. Thermal-radiative winds explain all of the spectral features (and their disappearance) in this simplest wind system and magnetic winds play only a minor role. We speculate that thermal-radiative winds can explain all the spectral features seen in the more complex (larger disc size) binaries, GRO J1655−40 and GRS 1915+105, without requiring magnetic winds.