论文标题
出生时踢和诱发的中子恒星旋转
Kicks and Induced Spins of Neutron Stars at Birth
论文作者
论文摘要
使用非旋转超新星祖细胞的模拟，我们探索了在核心崩溃中诞生的紧凑物体中赋予的旋转的踢球和旋转。我们发现，由于中微子排放而引起的后坐力可能是影响核心后座的因素，该因素与物质后坐力相当，有时比相应的踢球大。该结果将需要修改PULSAR适当运动的起源的一般模型。此外，我们发现网络中微子动量的迹象可能与相应物质后坐力的符号相反。结果，有时Pulsar后坐力和喷射可以朝着相同的方向。此外，我们的结果表明，中微子排放中偶极子的持续时间可能比中子恒星结合能的辐射持续时间短。这使得出现较大的偶极子不对称，但在短时间内，导致观察到的脉冲星范围内的踢球。此外，我们发现，物质的非球体积聚引起的自旋可以使塌陷的残基与旋转周期相当，可与无线电脉冲星的推断，并且似乎在诱导的旋转方向和净踢方向之间似乎有轻微的抗相关性。这可以解释观察到的无线电脉冲星之间的这种相关性。最后，我们发现赋予黑洞的踢是仅中微子后坐力引起的，因此大部分时间大部分时间都会出生$ \ le $ 100 km s $^{ - 1} $。
Using simulations of non-rotating supernova progenitors, we explore the kicks imparted to and the spins induced in the compact objects birthed in core collapse. We find that the recoil due to neutrino emissions can be a factor affecting core recoil, comparable to and at times larger than the corresponding kick due to matter recoil. This result would necessitate a revision of the general model of the origin of pulsar proper motions. In addition, we find that the sign of the net neutrino momentum can be opposite to the sign of the corresponding matter recoil. As a result, at times the pulsar recoil and ejecta can be in the same direction. Moreover, our results suggest that the duration of the dipole in the neutrino emissions can be shorter than the duration of the radiation of the neutron-star binding energy. This allows a larger dipole asymmetry to arise, but for a shorter time, resulting in kicks in the observed pulsar range. Furthermore, we find that the spin induced by the aspherical accretion of matter can leave the residues of collapse with spin periods comparable to those inferred for radio pulsars and that there seems to be a slight anti-correlation between the direction of the induced spin and the net kick direction. This could explain such a correlation among observed radio pulsars. Finally, we find that the kicks imparted to black holes are due to the neutrino recoil alone, resulting in birth kicks $\le$100 km s$^{-1}$ most of the time.
