论文标题
伽玛射线明亮准星1156+295中非热爆发期间的排放线变异性
Emission Line Variability during a Nonthermal Outburst in the Gamma-Ray Bright Quasar 1156+295
论文作者
论文摘要
我们介绍了$γ$ - 雷·布莱兹（Bright Blighlazar）1156 +295（4C +29.45，吨599）的多上两个光谱，该光谱使用4.3〜m Lowell Discovery望远镜获得。在2017年底的多波长爆发期间，$γ$ -Ray的通量增加到$ 2.5 \ times 10^{ - 6} \; \ rm phot \; cm^{ - 2} \; s^{ - 1} $，首先在Energies $ \ geq100 $ GEV处检测到了Quasar，Mg II $λ2798$发射线的通量发生了变化，而在较短波长处的Fe发射复合物的变化也是如此。这些发射线通量随着高度极化的光学连续通量的增加，这可能是从相对论射流中的同步辐射，相对时间延迟$ \ lysSim2 $ $周。这意味着发射线的云在喷气机附近，该云几乎直接指向视线。来自此类云的发射线辐射位于规范积聚盘外部相关的宽线区域之外，可能是种子光子的主要来源，在喷气机中，相对论电子在$γ$ ray-ray-ray的能量上。
We present multi-epoch optical spectra of the $γ$-ray bright blazar 1156+295 (4C +29.45, Ton 599) obtained with the 4.3~m Lowell Discovery Telescope. During a multi-wavelength outburst in late 2017, when the $γ$-ray flux increased to $2.5\times 10^{-6} \; \rm phot\; cm^{-2}\; s^{-1}$ and the quasar was first detected at energies $\geq100$ GeV, the flux of the Mg II $λ2798$ emission line changed, as did that of the Fe emission complex at shorter wavelengths. These emission line fluxes increased along with the highly polarized optical continuum flux, which is presumably synchrotron radiation from the relativistic jet, with a relative time delay of $\lesssim2$ weeks. This implies that the line-emitting clouds lie near the jet, which points almost directly toward the line of sight. The emission-line radiation from such clouds, which are located outside the canonical accretion-disk related broad-line region, may be a primary source of seed photons that are up-scattered to $γ$-ray energies by relativistic electrons in the jet.
