3C 279的全极化谱
Full Polarization Spectra of 3C 279
摘要：
我们报告的结果秒差距尺度，多频VLBA观测的核心区域的3C 279在斯托克斯我，线偏振，圆偏振。这些完整的偏振光谱建模的辐射转移模拟，以约束磁场和粒子特性的秒差距尺度射流在3C 279。核心区域的偏振特性，包括线偏振的量、法拉第旋转的量和符号以及圆偏振的量和符号可以通过一致的物理图像来解释。喷流的底部被建模为一个不均匀的Blandford-Konigl风格的锥形喷流占主导地位的矢量有序极向磁场沿喷流轴，我们估计其净磁通量。该极向场负责来自该非均匀分量的线偏振和圆偏振。进一步向下的射流的磁场在两个均匀的功能是由当地的冲击和矢量有序极向场的一小部分仍然沿着射流轴。在这幅图中，我们发现喷流在动力学上主要由质子控制，而辐射粒子主要由电子控制，大约占75%。根据对均匀组分的Faraday转换量的推导，我们发现相对论粒子能谱下限的合理范围为5 <~ gamma_l <~ 35。如果观测到的法拉第旋转和去极化发生在射流外部的屏幕上，那么这里描述的物理图像并不是唯一的;然而，我们发现，从射流内部的一组磁场和粒子特性中对线偏振和圆偏振观测的联合解释是这幅图像令人信服的证据。（节录）
英文摘要：
We report the results of parsec-scale, multi-frequency VLBA observations of the core region of 3C 279 in Stokes I, linear polarization, and circular polarization. These full polarization spectra are modeled by radiative transfer simulations to constrain the magnetic field and particle properties of the parsec-scale jet in 3C 279. The polarization properties of the core region, including the amount of linear polarization, the amount and sign of Faraday rotation, and the amount and sign of circular polarization can be explained by a consistent physical picture. The base of the jet is modeled as an inhomogeneous Blandford-Konigl style conical jet dominated by a vector-ordered poloidal magnetic field along the jet axis, and we estimate its net magnetic flux. This poloidal field is responsible for the linear and circular polarization from this inhomogeneous component. Farther down the jet the magnetic field in two homogeneous features is dominated by local shocks and a smaller fraction of vector-ordered poloidal field remains along the jet axis. In this picture, we find the jet to be kinetically dominated by protons with the radiating particles being dominated by electrons at an approximate fraction of >~ 75%. Based on the amounts of Faraday conversion deduced for the homogeneous components, we find a plausible range for the lower cutoff in the relativistic particle energy spectrum to be 5 <~ gamma_l <~ 35. The physical picture described here is not unique if the observed Faraday rotation and depolarization occur in screens external to the jet; however, we find the joint explanation of linear and circular polarization observations from a single set of magnetic fields and particle properties internal to the jet to be compelling evidence for this picture. (Abridged)
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
