论文标题
GRB喷气喷发中的插头瓦解
Plug Disintegration in GRB Jet Eruption
论文作者
论文摘要
在这项工作中，我们考虑了从致密的重型膜上的脆性相对论水动力喷射的喷发。随着喷气机的移动和走开，它随身携带并继续加速了我们称之为插头的一层重型材料。我们为插头的轨迹求解相对论运动方程，并使用相对论的流体动力模拟对其进行验证。我们表明，在这些条件下，由于雷利·泰勒（Rayleigh Taylor）的不稳定性的开始，插头在半径较大的半径上分解了几倍。破裂后，射流继续加速到更高的洛伦兹因子，而插头碎片保持适中的洛伦兹因子。移动弹出较慢的存在可以解释GRB的较晚特征，例如X射线耀斑，而无需求助于长时间的发动机。
In this work we consider the eruption of a tenuous relativistic hydrodynamic jet from a dense baryonic envelope. As the jet moves out and away, it carries along and continues to accelerate a layer of baryonic material which we refer to as the plug. We solve the relativistic equations of motion for the trajectory of the plug, and verify it using a relativistic hydrodynamic simulation. We show that under these conditions, the plug breaks up at a radius larger by a factor of a few from the radius of the envelope, due to the onset of the Rayleigh Taylor instability. After breakup the jet continues to accelerate to higher Lorentz factors while the plug fragments maintain a moderate Lorentz factor. The presence of slower moving ejecta can explain late time features of GRBs such as X ray flares without recourse to a long lived engine.
