论文标题
磁铁爆发火球的快速无线电爆发突破
Fast Radio Burst Breakouts from Magnetar Burst Fireballs
论文作者
论文摘要
最近发现了同时发生的大型jansky无线电爆发，而X射线磁力表中的短X射线爆发（强烈磁化的中子恒星（NS））SGR 1935+2154是一种假设，是一些宇宙学快速无线电爆发（FRB）的假设，它来自Magnetar Bursts。我们认为，X射线在高温$ t \ gtrsim 30 $ kev中爆发，需要电子 - positron（$ e^{\ pm} $）从被困的expent-expend Fireball中流出，从而污染了NS磁层，从而在FRB发射前污染了NS磁层。 $ e^{\ pm} $流出对frb光子不透明，并且被X射线突发强烈地拖累。然而，如果FRB发射半径大于几十个NS Radii，则FRB光子可以从辐射力中突破$ e^{\ pm} $流出。如果FRB较弱或X射线爆发更强，则将FRB窒息，这可能解释了为什么没有巨型耀斑的FRB，并且没有可检测到的X射线爆发，而FRB弱。我们还推测，对于FRB而言，$ e^{\ pm} $流出可能是不可避免的，解决了为什么仅在高$ t $ x射线爆发的情况下出现FRB的问题。突破物理学对于将发射机制和电磁对应物限制为未来的FRB很重要。
The recent discovery of a Mega-Jansky radio burst occurring simultaneously with short X-ray bursts from the Galactic magnetar (strongly magnetized neutron star (NS)) SGR 1935+2154 is a smoking gun for the hypothesis that some cosmological fast radio bursts (FRBs) arise from magnetar bursts. We argue that the X-ray bursts with high temperature $T \gtrsim 30$ keV entail an electron--positron ($e^{\pm}$) outflow from a trapped--expanding fireball, polluting the NS magnetosphere before the FRB emission. The $e^{\pm}$ outflow is opaque to FRB photons, and is strongly Compton-dragged by the X-ray bursts. Nevertheless, the FRB photons can break out of the $e^{\pm}$ outflow with radiation forces if the FRB emission radius is larger than a few tens of NS radii. A FRB is choked if the FRB is weaker or the X-ray bursts are stronger, possibly explaining why there are no FRBs with giant flares and no detectable X-ray bursts with weak FRBs. We also speculate that the $e^{\pm}$ outflow may be inevitable for FRBs, solving the problem of why the FRBs occur only with high-$T$ X-ray bursts. The breakout physics is important for constraining the emission mechanism and electromagnetic counterparts to future FRBs.
