论文标题
Blazar PKS 2155 $ -304的光学极化在2010年的光学耀斑期间
The optical polarization of the blazar PKS 2155$-$304 during an optical flare in 2010
论文作者
论文摘要
对Blazar PKS 2155 $ - $ 304的光学偏光和多色光度法（$ bvrj $）的行为进行了分析。在2010年爆发中。这种耀斑在大约117天内发展，幅度为117天，磁磁时间增加了$τ\ sim 11 $从蓝色到红色波浪的增加。极化角度最初与射流轴对齐，但随着耀斑的生长，旋转约90美元^\ Circ $。在低通量和高通量下，两个不同的状态显而易见。在18 mjy以下，极化角度具有广泛的值，与通量没有任何明显的关系。相比之下，极化角度与高于18 mjy的通量之间存在正相关。极化度与通量没有明显的相关性。我们发现，高通量状态的光极化行为可以归因于具有稳定的幂律光谱能量分布和高光偏振度（13.3％）的可变成分（13.3％）。这些属性在激电型模型中解释了，该模型表明，观察到的可变性可以通过几乎边缘的冲击来解释。磁场激电模型中的相对论喷射的一些参数为：磁场的$ b = 0.06 $ g，多普勒因子的$δ= 22.3 $，视角$φ= 2.6^\ circ $。
An analysis is presented of the optical polarimetric and multicolour photometric ($BVRJ$) behaviour of the blazar PKS 2155$-$304 during an outburst in 2010. This flare develops over roughly 117 days, with a flux doubling time $τ\sim 11$ days that increases from blue to red wavelengths. The polarization angle is initially aligned with the jet axis but rotates by roughly $90^\circ$ as the flare grows. Two distinct states are evident at low and high fluxes. Below 18 mJy, the polarization angle takes on a wide range of values, without any clear relation to the flux. In contrast, there is a positive correlation between the polarization angle and flux above 18 mJy. The polarization degree does not display a clear correlation with the flux. We find that the photopolarimetric behaviour for the high flux state can be attributed to a variable component with a steady power-law spectral energy distribution and high optical polarization degree (13.3%). These properties are interpreted within the shock-in-jet model, which shows that the observed variability can be explained by a shock that is seen nearly edge-on. Some parameters derived for the relativistic jet within the shock-in-jet model are: $B=0.06$ G for the magnetic field, $δ=22.3$ for the Doppler factor and $Φ=2.6^\circ$ for the viewing angle.
