论文标题
Kilonova弹出式驾驶风星云系统的宽带排放：延迟X射线余辉重新旋转GRB 170817A
Broadband Emission from a Kilonova Ejecta-Pulsar Wind Nebula System: Late-Time X-ray Afterglow Rebrightening of GRB 170817A
论文作者
论文摘要
我们研究了Kilonova弹出式风云（PWN）系统的宽带辐射行为。在此模型中，我们共同拟合了2017GFO在UV-Optication-IR频段和GRB 170817a的延迟X射线余辉中的观察结果。我们的工作表明，由残余中子星（NS）驱动的PWN GW170817事件可能会影响2017GFO的光瞬变，并重新启动GRB 170817a的延迟X射线余后。 PWN辐射将调节未来X射线观测的趋势，从平坦到急剧下降，直到其他一些来源（例如，Kilonova余辉）占主导地位。这项工作中中央NS参数的限制范围与以前基于2017GFO的观察结果一致。另外，新的拟合结果表明NS风被高度磁化。我们指出，当形成长期寿命的ns NS时，二进制NS合并的无线电和X射线发射可能是二进制NS合并的重要电磁特征。因此，对Kilonova弹出系统系统的观察将为推断合并残留的性质提供重要信息。
We study the broadband radiation behavior of a kilonova ejecta-pulsar wind nebula (PWN) system. In this model, we jointly fit the observations of AT 2017gfo in UV-optical-IR bands and the late-time X-ray afterglow of GRB 170817A. Our work shows that a PWN powered by the remnant neutron star (NS) post GW170817 event could affect the optical transient AT 2017gfo and re-brighten the late-time X-ray afterglow of GRB 170817A. The PWN radiation will regulate the trend of future X-ray observations from a flattening to a steep decline until some other sources (e.g., a kilonova afterglow) become dominant. The restricted ranges of the central NS parameters in this work are consistent with the previous works based on the observations of AT 2017gfo only. In addition, the new fitting result indicates that the NS wind is highly magnetized. We point out that the radio and X-ray emission from a kilonova ejecta-PWN system could be an important electromagnetic feature of binary NS mergers when a long-lived remnant NS is formed. Therefore, observations of a kilonova ejecta-PWN system will provide important information to inferring the nature of a merger remnant.
