标题： NuSTAR 探索的耀变体喷流-吸积功率关系的极端情况 显示英文标题

标题： Extremes of the jet-accretion power relation of blazars, as explored by NuSTAR

摘要： 硬 X 射线观测对于研究来自高红移强大耀变星的非热态喷流发射至关重要。 我们用硬 X 射线观测了两个红移 z > 2 的明亮平坦光谱射电类星体 (FSRQ)，以探索它们相对论性喷流的细节及其可能的变化。 S5 0014+81（z=3.366）和 B0222+185（z=2.690）已被核光谱望远镜阵列 (NuSTAR) 在与 Swift/XRT 同步观测中两次观测到，显示出不同的变化行为。 我们发现，即使没有检测到伽马射线发射，NuSTAR 对于探索强大的高红移耀变星的变化仍然具有重要作用。 这两个源已被证明分别是已知耀变星中最亮的吸积盘和最有力的喷流。 由于这些特性，它们位于之前为伽马射线探测到的耀变星所发现的喷流 - 吸积盘关系的极端端点上，并且与之保持一致。 显示英文摘要

摘要： Hard X-ray observations are crucial to study the non-thermal jet emission from high-redshift, powerful blazars. We observed two bright z>2 flat spectrum radio quasars (FSRQs) in hard X-rays to explore the details of their relativistic jets and their possible variability. S5 0014+81 (at z=3.366) and B0222+185 (at z=2.690) have been observed twice by the Nuclear Spectroscopic Telescope Array (NuSTAR) simultaneously with Swift/XRT, showing different variability behaviours. We found that NuSTAR is instrumental to explore the variability of powerful high-redshift blazars, even when no gamma-ray emission is detected. The two sources have proven to have respectively the most luminous accretion disk and the most powerful jet among known blazars. Thanks to these properties, they are located at the extreme end of the jet-accretion disk relation previously found for gamma-ray detected blazars, to which they are consistent.