论文标题
搜索短时间伽马射线爆发的无线电残留
Searching for the radio remnants of short duration gamma-ray bursts
论文作者
论文摘要
中子恒星合并产生大量快速移动的喷射，并在合并后多年向外扩展。这些喷射与周围培养基的相互作用可能会产生弱的各向同性无线电残留物，在相对附近的事件中可检测到。我们使用短持续时间伽马射线爆发（SGRB）的延迟无线电观察来限制该模型。研究了两个事件样本：选择了可能在本地（<200 MPC）宇宙中的四个SGRB来约束次偏见的剩余非热发射，而宇宙学距离处的17个SGRB被用来限制Proto-Magnetar Central Enginer Engine Engine的存在，并限制了Mergergez的Mergergez Acemenge exta。我们考虑了GRB〜170817A/GW170817的案例，并发现在这种情况下，早期无线电发射可能会被喷射爆炸波淬灭。在所有情况下，对于m_ej \ lyssim 10^{ - 2}（5 * 10^{ - 2}）m_sun的弹射质量范围，我们可以排除非常有能力的合并ejecta e_ej \ gtrsim 5 * * 10^{52} {52}（10^{53}）ERG，因此将其分组为强大的乘积。
Neutron star mergers produce a substantial amount of fast-moving ejecta, expanding outwardly for years after the merger. The interaction of these ejecta with the surrounding medium may produce a weak isotropic radio remnant, detectable in relatively nearby events. We use late-time radio observations of short duration gamma-ray bursts (sGRBs) to constrain this model. Two samples of events were studied: four sGRBs that are possibly in the local (<200 Mpc) universe were selected to constrain the remnant non-thermal emission from the sub-relativistic ejecta, whereas 17 sGRBs at cosmological distances were used to constrain the presence of a proto-magnetar central engine, possibly re-energezing the merger ejecta. We consider the case of GRB~170817A/GW170817, and find that in this case the early radio emission may be quenched by the jet blast-wave. In all cases, for ejecta mass range of M_ej \lesssim 10^{-2} (5 * 10^{-2}) M_sun, we can rule out very energetic merger ejecta E_ej \gtrsim 5 * 10^{52}(10^{53}) erg, thus excluding the presence of a powerful magnetar as a merger remnant.
