论文标题
黑洞X射线二进制Maxij1820+070在其2018年爆发期间通过偏振光观察到的碟片和风
Disc and wind in black hole X-ray binary MAXIJ1820+070 observed through polarized light during its 2018 outburst
论文作者
论文摘要
我们描述了低质量黑洞X射线二进制系统的整个爆发的第一个完整的偏光数据集，并讨论了其施加的几何形状和辐射机制的约束。在衰减的硬状态期间，当光通量由非热成分支配时，观察到的极化与所有过滤器中的星际值一致。在软状态期间，源的固有两极分化很小，$ \ sim 0.15 $在$ b $和$ v $过滤器中，很可能是在辐照光盘中生产的。在$ v $和$ r $过滤器中达到$ \ sim 0.5 $ \ sim的两极分化，在$ \ sim 25^\ circ $的位置角度，在上升的硬状态下观察到的恰逢系统中的发现。该角度与射流的位置角相吻合。通过赤道风中非热（热流或喷气底座）辐射的散射，可以最好地解释检测到的光极化。
We describe the first complete polarimetric dataset of the entire outburst of a low-mass black hole X-ray binary system and discuss the constraints for geometry and radiative mechanisms it imposes. During the decaying hard state, when the optical flux is dominated by the non-thermal component, the observed polarization is consistent with the interstellar values in all filters. During the soft state, the intrinsic polarization of the source is small, $\sim 0.15$ per cent in $B$ and $V$ filters, and is likely produced in the irradiated disc. A much higher polarization, reaching $\sim 0.5$ per cent in $V$ and $R$ filters, at position angle of $\sim 25^\circ$ observed in the rising hard state coincides in time with the detection of winds in the system. This angle coincides with the position angle of the jet. The detected optical polarization is best explained by scattering of the non-thermal (hot flow or jet base) radiation in an equatorial wind.
