标题： 附近低光度伽马射线暴作为超高能宇宙射线来源的重新审视 显示英文标题

标题： Nearby low-luminosity GRBs as the sources of ultra-high energy cosmic rays revisited

摘要： 低光度伽马射线暴（GRBs）的光度低于10^49erg/s，可能构成与经典高光度GRBs不同的群体。它们是迄今为止在约100 Mpc范围内检测到的最明亮天体，这是超高能宇宙射线（UHECRs）的视界距离，因此它们被认为是UHECRs的候选源。最近有观点认为，UHECRs的能量产生率远高于费米卫星测量的长时标GRBs的伽马射线光子能量产生率，如果这一观点成立，将挑战GRBs作为UHECRs来源的观点。我们在这里提出，由于低光度，许多低光度GRBs无法触发当前的GRB探测器，因此它们对局部伽马射线能量产生率的贡献被遗漏了。我们发现，考虑到被遗漏部分的真实局部能量产生率，该部分占总量的主要部分，足以解释UHECRs的通量。由于低光度，只有中等质量或重核可以被加速到约10^20 eV。我们讨论了这些超高能核在低光度GRBs中的加速和生存情况，特别是在那些被遗漏的低光度GRBs中。最后，计算了整个低光度GRB群体伴随的弥散中微子通量。 显示英文摘要

摘要： Low-luminosity gamma-ray bursts (GRBs) with luminosity . 10^49erg/s probably consititute a distinct population from the classic high-luminosity GRBs. They are the most luminous objects detected so far within ~ 100 Mpc, the horizon distance of ultra-high energy cosmic rays (UHECRs), so they are considered to be candidate sources of UHECRs. It was recently argued that the energy production rate in UHECRs is much larger than that in gamma-ray photons of long GRBs measured by the Fermi satellite, which, if true, would challenge the view that GRBs can be the sources of UHECRs. We here suggest that many of the low luminosity GRBs, due to their low luminosity, can not trigger the current GRB detectors and hence their contribution to the local gamma-ray energy production rate is missing. We find that the real local energy production rate by low-luminosity GRBs, taking into account the missing part, which constitutes a dominant fraction of the total amount, could be sufficient to account for the flux of UHECRs. Due to the low-luminosity, only intermediate-mass or heavy nuclei can be accelerated to ~ 10^20 eV. We discuss the acceleration and survival of these UHE nuclei in low-luminosity GRBs, especially in those missing low-luminosity GRBs. At last, the accompanying diffuse neutrino flux from the whole low-luminosity GRB population is calculated.