标题： 标准高功率耀变体（blazars） 显示英文标题

标题： Canonical high power blazars

摘要： 耀星系喷流在相对密集的外部辐射区域内传播。 理解耀星系从X射线到伽马射线能段高能辐射的起源，这一外部辐射是关键因素。 这些外部辐射场控制了逆康普顿辐射与同步辐射通量的比例。 因此，预测的谱能量分布（SED）将取决于喷流耗散部分能量以产生观测辐射的位置。 我们详细研究了当假设“标准”（即“典型”）吸积盘及其X射线日冕、喷流磁场轮廓以及外部辐射的处方时，SED如何随喷流耗散区位置的变化而变化。 一个“典型”喷流的磁能密度几乎从未主导发射电子的辐射冷却，因此逆康普顿通量几乎总是主导总的光度。 对于大质量黑洞来说更是如此。 发生在宽线区之外的耗散尤其有趣，因为它可以简单地解释最大的逆康普顿与同步辐射通量比，并伴随极其硬的X射线谱。 此外，它使高红移的大功率耀星系成为研究光学到紫外宇宙背景的有用工具。 显示英文摘要

摘要： The jets of powerful blazars propagate within regions relatively dense of radiation produced externally to the jet. This radiation is a key ingredient to understand the origin of the high energy emission of blazars, from the X-ray to the gamma-ray energy band. These external radiation fields control the amount of the inverse Compton radiation with respect to the synchrotron flux. Therefore the predicted spectral energy distribution (SED) will depend on where the jet dissipates part of its energy to produce the observed radiation. We investigate in detail how the SED changes as a function of the location of the jet dissipation region, by assuming rather "standard" (i.e. "canonical") prescriptions for the accretion disk and its X-ray corona, the profile of the jet magnetic field and the external radiation. The magnetic energy density of a "canonical" jet almost never dominates the radiative cooling of the emitting electrons, and consequently the inverse Compton flux almost always dominates the bolometric output. This is more so for large black hole masses. Dissipation taking place beyond the broad line region is particularly interesting, since it accounts in a simple way for the largest inverse Compton to synchrotron flux ratios accompanied by an extremely hard X-ray spectrum. Furthermore it makes the high power blazars at high redshift useful tools to study the optical to UV cosmic backgrounds.