论文标题
流体成分对伽马射线爆发中茧中突破的射流的影响：相对论de laval喷嘴处理
Effect of Fluid Composition on a Jet Breaking Out of a Cocoon in Gamma-ray Bursts: A Relativistic de Laval Nozzle Treatment
论文作者
论文摘要
在本文中，我们对正在脱离茧或恒星包膜的伽马射线爆发（GRB）射流进行了半分析的一般相对论研究。我们使用处理流体组成的状态相对论方程式解决了流体动力方程。简而言之，需要一种一般的相对论方法才能说明弯曲的时空在较强的重力下。射流穿过茧的刺穿类似于De Laval喷嘴，并且喷气机可能会经过回忆冲击过渡。我们表明，冲击过渡和冲击特性的可能性对物质组成和茧强度敏感。在热驱动的喷气机中获得的Lorentz因子舒适地达到了几美元$ \ $ 10。
In this paper, we carry out a semi-analytic general relativistic study of a Gamma-Ray Bursts (GRB) jet that is breaking out of a cocoon or stellar envelope. We solve hydrodynamic equations with the relativistic equation of state that takes care of fluid composition. In short GRBs, a general relativistic approach is required to account for curved spacetime in strong gravity. The piercing of the jet through the cocoon resembles a de Laval nozzle and the jet may go through recollimation shock transitions. We show that the possibility of shock transition and the shock properties are sensitive to the matter composition and the cocoon strength. Obtained Lorentz factors in thermally driven jets comfortably reach a few $\times$10.
