论文标题
NGC 4258和NGC 7213中低亮度活性银河核中的热积聚流动
Hot accretion flows in low-luminosity active galactic nuclei in NGC 4258 and NGC 7213
论文作者
论文摘要
我们研究了两个活性银河核（AGN），NGC 4258和NGC 7213的高能量排放。我们直接将这些物体的观测值直接应用于档案bepposax，nustar和suzaku观测值。这些数据集中的大多数表明，大约10-20％的吸积功率用于直接加热电子，但是，在某些情况下，我们还发现了电子加热效率的显着变化的指示。此外，所有这些X射线数据集都表明具有强烈磁性的流动，磁场靠近气压接近电气。将模型预测与NGC 7213的费米/LAT数据的比较使我们能够将非热质子的内容限制为最多10％。
We study the high energy emission of two active galactic nuclei (AGN), NGC 4258 and NGC 7213. We directly apply the general-relativistic (GR) hot flow model, kerrflow, to the archival BeppoSAX, NuSTAR and Suzaku observations of these objects. Most of these data sets indicate that about 10-20 per cent of the accretion power is used for the direct heating of electrons, however, we find also indications for significant changes of the electron heating efficiency in some cases. Furthermore, all these X-ray data sets indicate rather strongly magnetized flows, with the magnetic field close to the equipartition with the gas pressure. Comparison of the model prediction with the Fermi/LAT data for NGC 7213 allows us to constrain the content of nonthermal protons to at most 10 per cent.
