论文标题
孤儿伽玛射线耀斑的宽带建模
Broadband Modelling of Orphan Gamma Ray Flares
论文作者
论文摘要
Blazars是一类高度可变的活性银河核，有时会表现出孤儿$γ$ -Ray的耀斑。这些仅在$γ$ ray的能量中具有高通量的耀斑并没有显示出较低能量下的通量变化。我们研究了这些孤儿$γ$ ray的时间和光谱曲线，详细介绍了三个$γ射线$ bright Blazars，3C 273，PKS 1510-089和3C 279，以及它们的同时宽带发射。我们发现，孤儿$γ$ -Ray弹性的可变性时间尺度为$（0.96 \ pm0.28）$ days，$（3.12 \ pm2.40）$ HR和$（2.16 \ pm0.72）$ HR，分别为3C 273，PK 1510-089和3C 279，分别为3C 273。这些耀斑期间的宽带光谱能量分布（SED）已通过两个发射区域的松性模型进行了建模。该模型表明，孤儿$γ$ ray耀斑可能起源于相对论电子的逆综合散射，该散射是从宽线区域的种子光子或尘土飞扬的圆环（这是第一个区域）。虽然第二个宽阔的区域沿着喷气式飞机向下，但可能是X射线和无线电排放的原因。通过SED建模估计了这些发射区域在这三个来源的喷气机中的可能位置。
Blazars, a class of highly variable active galactic nuclei, sometimes exhibit Orphan $γ$-ray flares. These flares having high flux only in $γ$-ray energies do not show significant variations in flux at lower energies. We study the temporal and spectral profile of these Orphan $γ$-ray flares in detail from three $γ-ray$ bright blazars, 3C 273, PKS 1510-089 and 3C 279 and also their simultaneous broadband emissions. We find that the variability timescales of the Orphan $γ$-ray flares were $(0.96\pm0.28)$ days, $(3.12\pm2.40)$ hr and $(2.16\pm0.72)$ hr, for 3C 273, PKS 1510-089 and 3C 279, respectively. The broadband spectral energy distributions (SEDs) during these flares have been modelled with a leptonic model from two emission regions. This model suggests that Orphan $γ$-ray flares might have originated from inverse Compton scattering of relativistic electrons by the seed photons from the broad-line region or dusty torus, which is the first region. While the second broader region, lying further down the jet, could be responsible for X-ray and radio emissions. The possible locations of these emission regions in the jets of the three sources have been estimated from SED modelling.
