论文标题
强大的外乳外喷气机消散了远离中央黑洞的动能
Powerful extragalactic jets dissipate their kinetic energy far from the central black hole
论文作者
论文摘要
在某些活跃的银河核（AGN）中积聚到超大的黑洞上，驱动血浆的相对论喷射，这将它们的动能的很大一部分耗散到伽马射线辐射中。当前，能量耗散在强大的射流喷气机中的位置尚不清楚，这对颗粒加速度，喷射形成，喷射准直和能量耗散的影响有影响。先前的研究无法限制从亚比萨斯尺度的宽线区域到parsec尺度的分子圆环之间的位置。在这里，我们使用一个简单的诊断表明，较远的分子圆环是强大的喷气机的主要位置。这种称为种子因子的诊断仅取决于可观察的数量，并且在伽马射线发射位置的种子光子种群是独有的。 Using $62$ multiwavelength, quasi-simultaneous spectral energy distributions of gamma-ray quasars, we find a seed factor distribution which peaks at a value corresponding to the molecular torus, demonstrating that energy dissipation occurs $\sim 1$ parsec from the black hole (or $\sim 10^{4}$ Schwarzchild radii for a $ 10^{9} m _ {\ odot} $黑洞）。
Accretion onto the supermassive black hole in some active galactic nuclei (AGN) drives relativistic jets of plasma, which dissipate a significant fraction of their kinetic energy into gamma-ray radiation. The location of energy dissipation in powerful extragalactic jets is currently unknown, with implications for particle acceleration, jet formation, jet collimation, and energy dissipation. Previous studies have been unable to constrain the location between possibilities ranging from the sub-parsec-scale broad-line region to the parsec-scale molecular torus, and beyond. Here we show using a simple diagnostic that the more distant molecular torus is the dominant location for powerful jets. This diagnostic, called the seed factor, is dependent only on observable quantities, and is unique to the seed photon population at the location of gamma-ray emission. Using $62$ multiwavelength, quasi-simultaneous spectral energy distributions of gamma-ray quasars, we find a seed factor distribution which peaks at a value corresponding to the molecular torus, demonstrating that energy dissipation occurs $\sim 1$ parsec from the black hole (or $\sim 10^{4}$ Schwarzchild radii for a $10^{9}M_{\odot}$ black hole).
