论文标题
PSR J1603-7202的长期闪烁观测值的轨道动力学和极端散射事件特性
Orbital dynamics and extreme scattering event properties from long-term scintillation observations of PSR J1603-7202
论文作者
论文摘要
We model long-term variations in the scintillation of binary pulsar PSR J1603$-$7202, observed by the 64 m Parkes radio telescope (Murriyang) between 2004 and 2016. We find that the time variation in the scintillation arc curvature is well-modelled by scattering from an anisotropic thin screen of plasma between the Earth and the pulsar.使用我们的闪烁模型，我们测量了轨道上升节点的倾斜角度和经度，对脉冲星时的约束产生了显着改善。从我们对倾斜角度的测量来看，我们在$ \ gtrsim 0.5 \，\ text {m} _ \ odot $的同伴中放置下限制的J1603 $ - $ 7202的同伴。我们发现，当沿视线的电子柱密度增加时，闪烁电弧最为明显，并且在已知的极端散射事件中存在弧。我们测量与星际等离子体及其速度的距离，并讨论了在模型的背景下在单个闪烁弧中看到的一些结构。
We model long-term variations in the scintillation of binary pulsar PSR J1603$-$7202, observed by the 64 m Parkes radio telescope (Murriyang) between 2004 and 2016. We find that the time variation in the scintillation arc curvature is well-modelled by scattering from an anisotropic thin screen of plasma between the Earth and the pulsar. Using our scintillation model, we measure the inclination angle and longitude of ascending node of the orbit, yielding a significant improvement over the constraints from pulsar timing. From our measurement of the inclination angle, we place a lower bound on the mass of J1603$-$7202's companion of $\gtrsim 0.5\,\text{M}_\odot$ assuming a pulsar mass of $\gtrsim1.2\,\text{M}_\odot$. We find that the scintillation arcs are most pronounced when the electron column density along the line of sight is increased, and that arcs are present during a known extreme scattering event. We measure the distance to the interstellar plasma and its velocity, and we discuss some structures seen in individual scintillation arcs within the context of our model.
