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首页> 外文会议>Proceedings of the 32nd International Cosmic Ray Conference >Active Galactic Nuclei Jets and Multiple Shock Acceleration: Depleted Spectra
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Active Galactic Nuclei Jets and Multiple Shock Acceleration: Depleted Spectra

机译：主动银河核喷射和多重冲击加速：光谱耗尽

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Shocks in jets and hot spots of Active Galactic Nuclei (AGN) are one prominent class of possible sources ofthe observed ultra high energy cosmic rays (UHECRs). Extrapolating their spectrum to the plausible injection energyby an assumed shock in the jet, implies an enormous hidden energy for a spectrum of index -2 or steeper. Concerningthe AGN jet power, it seems implausible that more than at the very best 1/3 the energy, assuming for example CenA asa main source, goes into the required flux of energetic particles thus, one would need to allow for the possibility thatthere is a energy problem, which among other aspects, we would like to address in this work. We propose an accelerationmodel allowing a single injection of particles accelerated consecutively by several oblique (i.e. conical) subluminal andsuperluminal shocks, along an AGN jet axis. We find that the first shock of a sequence of relativistic conical shocks,establishes a power-law spectrum with E2.7 , which favours the local high energy theoretical predictions. The fol-lowingconsecutive shocks push the spectrum up in energy to the UHECRs, rendering flatter distributions, leaving adepletion at low energies, satisfying queries about a puzzling source power. Moreover, our calculations show a varia-tionof spectral slopes, in connection to our inquiry of a single particle injection in multiple shocks and, the propertiesof relativistic shocks, shedding further light into understanding the jet-shock-magnetic field geometries and consequentproduced spectra by AGN jets.
机译：活跃银河核（AGN）的喷射和热点冲击是观察到的超高能宇宙射线（UHECR）的可能来源中的一类。通过假设的射流冲击，将其光谱推算为可能的注入能量，这意味着对于折射率为-2或更陡峭的光谱，存在巨大的隐藏能量。关于AGN射流功率，以最高能量的1/3（例如，以CenA作为主要来源）进入所需的高能粒子通量，这似乎是令人难以置信的，因此，需要考虑到存在一种能量的可能性。能源问题，我们希望在这项工作中解决其他问题。我们提出了一种加速模型，该模型允许沿AGN射流轴单次注入受到几次倾斜（即圆锥形）腔内和超腔内冲击连续加速的粒子。我们发现相对论性圆锥形振动序列的第一个振动以E2.7建立幂律谱，这有利于局部高能理论预测。随之而来的连续冲击将能量频谱向上推至UHECR，使分布更加平坦，从而使低能量耗竭，满足了对令人困惑的源功率的疑问。此外，我们的计算还显示出光谱斜率的变化，这与我们对多次冲击中的单次粒子注入的询问以及相对论性冲击的性质有关，从而使更多的光用于理解射电冲击磁场的几何形状以及由AGN产生的光谱喷气机。

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