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Tidally disrupted stars as a possible origin of both cosmic rays and neutrinos at the highest energies

机译:潮汐破裂的恒星可能是宇宙射线和中微子在最高能量时的起源

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摘要

Tidal Disruption Events (TDEs) are processes where stars are torn apart by the strong gravitational force near to a massive or supermassive black hole. If a jet is launched in such a process, particle acceleration may take place in internal shocks. We demonstrate that jetted TDEs can simultaneously describe the observed neutrino and cosmic ray fluxes at the highest energies if stars with heavier compositions, such as carbon-oxygen white dwarfs, are tidally disrupted and these events are sufficiently abundant. We simulate the photo-hadronic interactions both in the TDE jet and in the propagation through the extragalactic space and we show that the simultaneous description of Ultra-High Energy Cosmic Ray (UHECR) and PeV neutrino data implies that a nuclear cascade in the jet is developed by photo-hadronic interactions.
机译:潮汐破坏事件(TDE)是恒星在强大或巨大的黑洞附近被强大的引力撕裂的过程。如果在这种过程中启动喷气机,则在内部震动中可能会发生粒子加速。我们证明,如果具有较重组成的恒星(例如,碳氧白矮星)被潮汐破坏并且这些事件足够充沛,那么喷射的TDE可以同时以最高能量描述观测到的中微子和宇宙射线通量。我们模拟了TDE射流和穿过银河外空间的传播中的光强相互作用,并且我们发现超高能宇宙射线(UHECR)和PeV中微子数据的同时描述暗示了射流中的核级联是由光强相互作用开发。

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