标题： 喷流的力量：耀变体与银河超光速天体 显示英文标题

标题： The power of jets: blazars vs galactic superluminals

摘要： 不同尺度上相对论性整体运动功率的估计结果被提出。 喷流中的功率和吸积盘产生的功率被发现大致相等。 这可能表明磁场在提取吸积物质的引力能和黑洞的旋转能方面起着重要作用。 讨论了一种推导喷流最小功率的方法，并用来确定耀星和银河系超光速源GRS 1915+105的喷流功率下限。 讨论了喷流中的物质含量，发现电子正电子对不可能是动态重要的。 喷流功率最初可以以庞斯廷通量的形式存在，逐渐加速物质，直到粒子的整体运动与庞斯廷通量之间达到均分。 显示英文摘要

摘要： Estimates on different scales of the power of relativistic bulk motion in extragalactic and galactic jets are presented. The power in the jets and the power produced by the accretion disk are found to be roughly equal. This may suggest an important role of the magnetic field in extracting both the gravitational energy of the accreting matter and the rotational energy of the black hole. A method to derive the minimum power of jets is discussed, and used to find lower limits to the jet power of blazars and the galactic superluminal source GRS 1915+105. The matter content of jets is discussed, finding that electron positron pairs cannot be dynamically important. The jet power can initially be in the form of Poynting flux, gradually accelerating matter until equipartition between bulk motion of the particles and Poynting flux is reached.