论文标题
关于SS433的形成
On the Formation of SS433
论文作者
论文摘要
SS433是一种非凡的X射线二进制，它以$ 26 \％的光速弹出双极喷气机。 SS433与超新星般的Shell W50相关，也可能是最年轻的X射线二进制文件之一，年龄为$ \ lyseSim 10^5 $ yr。但是，SS433中两个组成部分的质量甚至紧凑型物体的性质仍在争论中。在这项工作中，假设紧凑的对象是黑洞，我们采用二元种群合成方法来研究SS433的形成。我们使用先前对W50年龄和射流活动持续时间的估计来限制进化史。我们的计算表明，SS433可能在当前的Roche-Lobe溢出阶段开始时拥有Hertzsprung Gap Star。 SS433中的黑洞和光学/供体星的质量分别为$ 8 \ m _ {\ odot} $和$ 24 \ m _ {\ odot} $。未来的供体质量和半径的测量不仅可以帮助推断二进制的原始，而且可以帮助Nebula W50的性质。
SS433 is an extraordinary X-ray binary which is ejecting bipolar jets with $26\%$ of the speed of light. Associated with the supernova-like shell W50, SS433 is also probably one of the youngest X-ray binaries with an age of $\lesssim 10^5$ yr. However, the masses of the two components in SS433 and even the nature of the compact object are still under debate. In this work, assuming that the compact object is a black hole, we employ a binary population synthesis method to study the formation of SS433. We use previous estimates of the age of W50 and the duration of the jet activity to constrain the evolutionary history. Our calculations suggest that SS433 likely harboured a Hertzsprung gap star at the beginning of the current Roche-lobe overflow phase. The masses of the black hole and the optical/donor star in SS433 suggested by the simulations are around $8\ M_{\odot}$ and $24\ M_{\odot}$, respectively. Future measurement of the donor mass and radius can help infer not only the orgin of the binary but also the nature of the nebula W50.
