论文标题
Blazar OJ287中周期性光爆发的极化行为
Polarization behavior of periodic optical outbursts in blazar OJ287
论文作者
论文摘要
作为通用大麻的特征，研究了OJ287中观察到的准周期光学爆发的极化行为。 2015年12月爆发的光曲线也通过先前提出的进攻喷嘴模型进行了模拟。为了了解其光辐射的性质，分析了1983.0，2007.8和2015.8在1983.0，2007.8和2015.8达到峰值的三个原发性光学爆发的极化行为。已经应用了两个组件模型，表明磁通密度，极化程度和极化位置角的变化可以用两个极化组件始终如一地解释：一个具有恒定极化的稳定组件和一个爆发分量和一个具有变化的极化（例如，相对论性的沿喷气轴沿射流轴的相对论冲击传播）。 2015年12月爆发的通量光曲线（包括其第一张耀斑和第二耀斑）是通过14个基本同步子亚速率进行了充分模拟的，每个曲线都具有对称曲线。三个主要爆发的极化行为模型模拟（1983.0，2007.8和2015.8）表明它们在极化位置角度上都表现出快速和较大的旋转，这意味着它们是射流中产生的同步弹性。 Combining with the results previously obtained for interpreting the optical light curves in terms of lighthouse effect for both quasi-periodic and non-periodic outbursts, we suggest that relativistic jet models may be the most appropriate models for understanding the nature of the optical flaring radiation in blazar OJ287: its optical outbursts may comprise a number of blended "elementary synchrotron flares" , each produced by the单个静脉光学结的螺旋运动通过日间效应。
As a characteristic feature of generic blazars the polarization behavior of the quasi-periodic optical outbursts observed in OJ287 is investigated. The optical light-curves of the December/2015 outburst are also simulated in terms of the precessing jet nozzle model previously proposed. The polarization behavior of three primary quasi-periodic optical outbursts peaking in 1983.0, 2007.8 and 2015.8 are analyzed in order to understand the nature of their optical radiation. A two-component model has been applied,showing that the variations in flux density, polarization degree and polarization position angle can be consistently interpreted with two polarized components: one steady-component with constant polarization and one burst-component with varying polarization (e.g., relativistic shock propagating along the jet-beam axis). The flux light curves of the December/2015 outburst (including its first flare and second flare) are well model-simulated in terms of 14 elementary synchrotron sub-flares, each having a symmetric profile. The model simulations of polarization behavior for the three major outbursts (in 1983.0, 2007.8 and 2015.8) demonstrate that they all exhibit rapid and large rotations in polarization position angle, implying that they are synchrotron flares produced in the jet. Combining with the results previously obtained for interpreting the optical light curves in terms of lighthouse effect for both quasi-periodic and non-periodic outbursts, we suggest that relativistic jet models may be the most appropriate models for understanding the nature of the optical flaring radiation in blazar OJ287: its optical outbursts may comprise a number of blended "elementary synchrotron flares" , each produced by the helical motion of individual superluminal optical knots via lighhouse effect.
