标题： 由普遍jet结构预测的GRB余辉的偏振曲线 显示英文标题

标题： Polarization curves of GRB afterglows predicted by the universal jet structure

摘要： 最近有人提出，当前的爆发现象和余辉观测可以通过一种圆锥形喷流结构以及一种更普遍的结构化外流来解释，这种外流的能量在喷流脊处达到最大值，并随着离轴角以幂律形式向外递减。 确定伽马射线暴（GRBs）喷流的结构对于量化未知引擎释放的总能量并对其性质加以限制非常重要。 在本文中，我们将回顾最流行的伽马射线暴喷流结构，重点关注那些可以区分它们的预测观测特性。 特别是线性偏振发射在余辉阶段的行为似乎非常有前景，因为不同模型预测的偏振程度及时变依赖关系差异显著。 此外，偏振测量和探测正在迅速积累，很快将有助于理解磁场和伽马射线暴喷流的构型。 显示英文摘要

摘要： It has been recently proposed that current burst and afterglow observations can be accounted for by a top hat jet structure as well as by a more universal structured outflow, in which the energy carried by the flow is maximum at the jet spine, decreasing outwards as a power-law with the off-axis angle. To pin down the GRBs jet structure is important in order to quantify the total energy released by the unknown engine and put constrains on its nature. In paper we will review the most popular GRBs jet structures, focusing on the predicted observed properties that could discriminate between them. In particular the behaviour of linearly polarised emission during the afterglow phase seems very promising, since the degree and temporal dependence are predicted to be very different from model to model. In addition, polarization measurements and detections are accumulating fast enouqgh to lead soon to a comprehension of magnetic field and GRBs jet configurations.