论文标题
宇宙黑洞破坏恒星后，相对论喷射的诞生
The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole
论文作者
论文摘要
黑洞会在潮汐破坏一颗星星后发射强大的相对论喷气机。如果这款喷射与我们的视线保持一致，那么总体亮度将由多个数量级增强。因此，这种轴上相对论的潮汐破坏事件（TDE）有可能揭示宇宙学（红移$ z> $ 1）静止的黑洞，并且是理想的测试床，以了解超级埃德丁顿喷气机中运行的辐射机制。在这里，我们介绍了$ z = 1.193 $的光学发现的瞬态\ target的多波长（X射线，UV，光学和无线电）。其不寻常的X射线属性，包括$ \ gtrsim $ 10 $^{48} $ erg s $^{ - 1} $的峰值光度，在时间尺度上短达1000秒的系统变异性，其余持续时间持续了30天以上，其余时间与相关性相关。发现后5-50天的X射线到无线电光谱分布可以解释为从相对论喷射（无线电），同步加速器自compton（X射线）和类似于低红色TDES（UV/Optical）中相似的热发射的同步器发射。我们的建模意味着类似于Blazar的光线，高度相对论的射流，但需要极端的物质作用，即射流中电子与磁场能量密度的高比例，并挑战了我们对喷气机的理论理解。
A black hole can launch a powerful relativistic jet after it tidally disrupts a star. If this jet fortuitously aligns with our line of sight, the overall brightness is Doppler boosted by several orders of magnitude. Consequently, such on-axis relativistic tidal disruption events (TDEs) have the potential to unveil cosmological (redshift $z>$1) quiescent black holes and are ideal test beds to understand the radiative mechanisms operating in super-Eddington jets. Here, we present multi-wavelength (X-ray, UV, optical, and radio) observations of the optically discovered transient \target at $z=1.193$. Its unusual X-ray properties, including a peak observed luminosity of $\gtrsim$10$^{48}$ erg s$^{-1}$, systematic variability on timescales as short as 1000 seconds, and overall duration lasting more than 30 days in the rest-frame are traits associated with relativistic TDEs. The X-ray to radio spectral energy distributions spanning 5-50 days after discovery can be explained as synchrotron emission from a relativistic jet (radio), synchrotron self-Compton (X-rays), and thermal emission similar to that seen in low-redshift TDEs (UV/optical). Our modeling implies a beamed, highly relativistic jet akin to blazars but requires extreme matter-domination, i.e, high ratio of electron-to-magnetic field energy densities in the jet, and challenges our theoretical understanding of jets.
