论文标题
通过公共包膜演化模拟射流的角动量的沉积
Simulating the deposition of angular momentum by jets in common envelope evolution
论文作者
论文摘要
我们对红色超级巨星（RSG）包膜内的中子恒星（NS）或黑洞（NS）或黑洞（bh）进行了三维流体动力学模拟，并发现我们期望在CEE旋转的公共信封期间发射NS/BH的喷气机。我们发现，当NS/BH发射垂直于轨道平面（喷气机与轨道角动量对齐）时，喷头将角动量沉积到与轨道角动量对齐的信封上。当喷气机轴倾斜到轨道角动量轴时，喷气机沉积在信封上的角动量也是如此。当NS/BH进入RSG信封时，可能会发射这种倾斜的喷气机。我们不允许进行螺旋入内，只能遵循三个轨道的进化。当NS/BH迅速潜入时，第一个轨道模仿了CEE的插入相，而第三个轨道在螺旋入内的速度非常慢时模仿自调节相。我们发现，喷气机仅在跌入阶段沉积了大量的角动量。后天堂核心倒塌的超新星爆炸将留下两个NS/BH，结合或未结合，其旋转可能被旋转与轨道角动量失误。我们的结果加强了较早的说法，即倾斜的三星级ECE可能导致NS/BH-NS/BH二元系统的自旋轨道未对准。
We conducted three-dimensional hydrodynamical simulations of common envelope evolution (CEE) of a neutron star (NS) or a black hole (BH) inside a red supergiant (RSG) envelope and find that the jets that we expect the NS/BH to launch during the CEE spin-up the common envelope. We find that when the NS/BH launches jets that are exactly perpendicular to the orbital plane (the jets are aligned with the orbital angular momentum) the jets deposit angular momentum to the envelope that is aligned with the orbital angular momentum. When the jets' axis is inclined to the orbital angular momentum axis so is the angular momentum that the jets deposit to the envelope. Such tilted jets might be launched when the NS/BH has a close companion when it enters the RSG envelope. We did not allow for spiralling-in and could follow the evolution for only three orbits. The first orbit mimics the plunge-in phase of the CEE, when the NS/BH rapidly dives in, while the third orbit mimics the self-regulated phase when spiralling-in is very slow. We find that the jets deposit significant amount of angular momentum only during the plunge-in phase. A post-CEE core collapse supernova explosion will leave two NS/BH, bound or unbound, whose spin might be misaligned to the orbital angular momentum. Our results strengthen an earlier claim that inclined-triple-star CEE might lead to spin-orbit misalignment of NS/BH-NS/BH binary systems.
