论文标题
爆发2020年至2021年，Bl lacertae的极化度/角度的微核能和波长依赖性
The microvariability and wavelength dependence of polarization degree/angle of BL Lacertae in the outburst 2020 to 2021
论文作者
论文摘要
我们在2020年至2021年的历史爆发期间，在光学和近红外（NIR）带中对Blazar bl lacertae的同时且连续的照片极化观察结果。在总共进行了十夜的观察结果中，在其中进行了十个观察结果，在几分钟时间内显示了几个小时的时间表。这表明一个紧凑的发射区域，并且很难通过单区减震模型来解释时间表。此外，我们发现光学和NIR带之间的极化度（PD）和角度有显着差异。九个晚上在光条中显示了一个大于或等于NIR带中的PD，可以通过震动射流模型或湍流的极端多区域（TEMZ）模型来解释。另一方面，在NIR频段中，五个晚上的PD比光条更高，而光频带无法通过简单的震动型模型或简单的TEMZ模型来解释。观察到的时间尺度和PD和极化角的波长依赖性表明存在复杂的多个发射区，例如不规则的TEMZ模型。
We have obtained simultaneous and continuous photo-polarization observations of the blazar BL Lacertae in optical and near-infrared (NIR) bands during a historical outburst from 2020 to 2021. In total, fourteen nights of observations were performed where ten observations show microvariability on timescales of a few minutes to several hours. This suggests a compact emission region, and the timescales are difficult to explain by a one-zone shock-in-jet model. Moreover, we found significant differences in the polarization degree (PD) and angle between optical and NIR bands. Nine nights showed a PD in the optical band that is greater than or equal to that in the NIR band, which can be explained by either a shock-in-jet model or the Turbulent Extreme Multi-Zone (TEMZ) model. On the other hand, five nights showed higher PD in a NIR band than an optical band, which cannot be explained by simple shock-in-jet models nor the simple TEMZ model. The observed timescales and wavelength dependency of the PD and polarization angle suggest the existence of complicated multiple emission regions such as an irregular TEMZ model.
