标题： 纯辐射和引力辐射 显示英文标题

标题： Pure and gravitational radiation

摘要： 众所周知的渐近平坦真空场的处理方法被应用于纯辐射场。 在此方法中，我们发现了一种辐射零矢量的自然归一化。 在null无限处的能量平衡表明，质量损失来自于纯辐射部分和引力辐射部分的线性叠加。 通过转换到Bondi-Sachs坐标，发现Kinnersley光子火箭是唯一没有引力辐射的轴对称Robinson-Trautman纯辐射解。 显示英文摘要

摘要： The well-known treatment of asymptotically flat vacuum fields is adapted to pure radiation fields. In this approach we find a natural normalization of the radiation null vector. The energy balance at null infinity shows that the mass loss results from a linear superposition of the pure and the gravitational radiation parts. By transformation to Bondi-Sachs coordinates the Kinnersley photon rocket is found to be the only axisymmetric Robinson-Trautman pure radiation solution without gravitational radiation.