论文标题

双中性星星合并后的磁性风力驱动冲击突破发射:合并弹射的各向异性的影响

Magnetar wind-driven shock breakout emission after double neutron star mergers: The effect of the anisotropy of the merger ejecta

论文作者

Wu, Guang-Lei, Yu, Yun-Wei, Li, Shao-Ze

论文摘要

快速旋转且高度磁性的残留中子星(NS; Magnetar)可以从双重NS的合并中生存,并驱动强大的相对论风。这条风与先前的合并喷射的早期相互作用可能导致冲击突破(SBO)发射主要是在紫外线和软X射线带中,这为存在残余磁力的存在提供了观察性签名。在这里,我们研究了合并喷射的各向异性结构对SBO发射的影响。发现可以扩大SBO发射的辐射光曲线,因为SBO可以在不同的时间出现不同方向的不同时间。更详细地说,SBO光曲线的轮廓可以高度取决于射流结构,因此,我们可以原则上使用SBO光曲线在将来探测合并弹出的结构。

A rapidly rotating and highly magnetized remnant neutron star (NS; magnetar) could survive from a merger of double NSs and drive a powerful relativistic wind. The early interaction of this wind with the previous merger ejecta can lead to shock breakout (SBO) emission mainly in ultraviolet and soft X-ray bands, which provides an observational signature for the existence of the remnant magnetar. Here we investigate the effect of an anisotropic structure of the merger ejecta on the SBO emission. It is found that bolometric light curve of the SBO emission can be broadened, since the SBO can occur at different times for different directions. In more detail, the profile of the SBO light curve can be highly dependent on the ejecta structure and, thus, we can in principle use the SBO light curves to probe the structure of the merger ejecta in future.

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