论文标题
常见信封中的磁盘形成和喷气倾斜作用
Disk formation and jet inclination effects in Common Envelopes
论文作者
论文摘要
共同包膜（CE）阶段的进化和物理学仍然不太了解。在此阶段，从紧凑型物体发射的喷气机可以定义二进制系统的进化结果。我们专注于从中子恒星（NS）发射喷气机的案例，该恒星（NS）吞没了红色巨人（RG）的外层。我们对具有不同的亮度和倾斜度的喷气机进行了一组三维流体动力学模拟。射流的亮度是由质量积聚率和效率$η$自我调节的。根据$η$的价值，喷气机可能会爆发出BHL凸起（“成功的喷气式飞机”），并与即将来临的风保持一致，反过来，它将重新调整，以支持风向的方向。射流的尺寸和方向变化，可能会呈现静止和活跃的时期。射流和科里奥利和离心力的倾向仅略微影响全球进化。由于积聚是高临界的，并且特定的角动量高于形成磁盘的临界值，因此我们推断出磁盘的形成和喷气机的发射。磁盘的质量和大小为$ \ sim $ 10 $^{ - 2} $ 〜m $ _ \ odot $和$ \ gtrsim 10^{10} $ cm，并且它可能具有带有不同旋转方向的戒指。为了从白色矮人中获得成功的喷气式飞机，弹出过程需要非常有效（$η\ sim $ 0.5）。对于主要序列星，没有足够的能源储层来推出成功的喷气机。
The evolution and physics of the common envelope (CE) phase are still not well understood. Jets launched from a compact object during this stage may define the evolutionary outcome of the binary system. We focus on the case in which jets are launched from a neutron star (NS) engulfed in the outer layers of a red giant (RG). We run a set of three-dimensional hydrodynamical simulations of jets with different luminosities and inclinations. The luminosity of the jet is self-regulated by the mass accretion rate and an efficiency $η$. Depending on the value of $η$ the jet can break out of the BHL bulge ("successful jet") and aligns against the incoming wind, in turn, it will realign in favour of the direction of the wind. The jet varies in size and orientation and may present quiescent and active epochs. The inclination of the jet and the Coriolis and centrifugal forces, only slightly affect the global evolution. As the accretion is hypercritical, and the specific angular momentum is above the critical value for the formation of a disk, we infer the formation of a disk and launching of jets. The disks' mass and size would be $\sim$10$^{-2}$~M$_\odot$ and $\gtrsim 10^{10}$ cm, and it may have rings with different rotation directions. In order to have a successful jet from a white dwarf, the ejection process needs to be very efficient ($η\sim$0.5). For main sequence stars, there is not enough energy reservoir to launch a successful jet.
