Prominent Polarized Flares of the Blazars AO 0235+164 and PKS 1510-089
Prominent Polarized Flares of the Blazars AO 0235+164 and PKS 1510-089
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耀变者 AO 0235 164 和 PKS 1510-089 的突出偏振耀斑
DOI：
10.1093/pasj/63.3.489
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发表时间：
2011
影响因子：
2.3
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Sasada;Uemura;et al.
我们报告了耀变体AO 0235164和PKS 1510089的多波段光度和偏振观测。这两颗耀变体分别活跃于2008年和2009年。在这些活跃状态下，两个天体都观测到了显著的短耀斑，其振幅在10天内达到1等。当这些耀斑中的物体更亮时，颜色变得更蓝。另一方面，PKS 1510089的颜色表现出一种趋势，即当它更亮时，它变得更红，除了它的显著耀斑。这种越亮越红的趋势可以用来自吸积盘的热辐射的强烈贡献来解释。耀斑时偏振度增大，最大值达到25%。我们将AO 0235164和PKS 1510089中的耀斑与我们对41个耀变体的监测中发现的其他短耀斑进行了比较。这两个耀斑在流量和偏振度上都有最大的变化幅度。此外，我们还发现在短耀斑中，流量振幅与偏振度之间存在显著的正相关关系。这表明短耀斑起源于磁场对准的区域。
We report on multi-band photometric and polarimetric observations of the blazars AO 0235164 and PKS 1510089. These two blazars were active in 2008 and 2009, respectively. In these active states, prominent short flares were observed in both objects, having amplitudes of1mag within 10d. Thecolor became bluer when the objects were brighter in these flares. On the other hand, the color of PKS 1510089 exhibited a trend that it became redder when it was brighter, except for its prominent flare. This redder-when-brighter trend can be explained by the strong contribution of thermal emission from an accretion disk. The polarization degree increased at the flares, and reached25% at the maxima. We compared these flares in AO 0235164 and PKS 1510089 with other short flares that were detected by our monitoring of 41 blazars. Those two flares had one of the largest variation amplitudes in both flux and polarization degree. Furthermore, we found a significant positive correlation between the amplitudes of the flux and the polarization degree in short flares. It indicates that the short flares originate from the region where the magnetic field is aligned.