论文标题
潮汐破坏事件中观察到的中微子的一致性场景
A concordance scenario for the observed neutrino from a Tidal Disruption Event
论文作者
论文摘要
在一次潮汐破坏事件中，一颗恒星被超级质量黑洞的潮汐力撕裂，大约50％的恒星质量最终被黑洞积聚。在极端的超级 - 埃德丁顿质量积聚的情况下，产生的耀斑会导致相对论的喷气。虽然潮汐破坏事件是从理论上提出的，作为高能量宇宙射线和中微子的来源，但堆叠搜索表明它们对弥漫性弥漫性外层中性中微子通量的贡献非常低。然而，最近将轨道样天体中微子与潮汐破坏事件（AT2019DSG）的关联表明，某些潮汐破坏事件可以加速宇宙射线到PEV能量。在这里，我们引入了一种现象学的一致性场景与相对论的喷气机，以解释这种关联：扩展的茧逐渐掩盖了增生磁盘发出的X射线，同时又掩盖了X射线，同时通过Proton-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Phot-Photon相互作用提供了足够强烈的背面X射线外部目标。我们还通过用黑体半径缩放生产半径来重现中微子发射的延迟（相对于峰值）。我们对射流和茧的能量和假设与潮汐破坏事件的数值模拟的期望兼容。
During a tidal disruption event, a star is torn apart by the tidal forces of a supermassive black hole, with about 50% of the star's mass eventually accreted by the black hole. The resulting flare can, in extreme cases of super-Eddington mass accretion, result in a relativistic jet. While tidal disruption events have been theoretically proposed as sources of high-energy cosmic rays and neutrinos, stacking searches indicate that their contribution to the diffuse extragalactic neutrino flux is very low. However, a recent association of a track-like astrophysical neutrino with a tidal disruption event (AT2019dsg) indicates that some tidal disruption events can accelerate cosmic rays to PeV energies. Here we introduce a phenomenological concordance scenario with a relativistic jet to explain this association: an expanding cocoon progressively obscures the X-rays emitted by the accretion disk, while at the same time providing a sufficiently intense external target of back-scattered X-rays for the production of neutrinos via proton-photon interactions. We also reproduce the delay (relative to the peak) of the neutrino emission by scaling the production radius with the black body radius. Our energetics and assumptions for the jet and the cocoon are compatible with expectations from numerical simulations of tidal disruption events.
