Constraints on the Location of the Gamma-ray Emission Region for the Gamma-ray-loud Radio Source GB 1310+487
Constraints on the Location of the Gamma-ray Emission Region for the Gamma-ray-loud Radio Source GB 1310+487
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DOI：
10.3847/1538-4357/aa6005
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发表时间：
2017-02
期刊：
影响因子：
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通讯作者：
Shi-Ju Kang
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作者：
Shi-Ju Kang
采用同步加速器、同步加速器自康普顿和外部康普顿（EC）过程的单区轻子射流模型，模拟了窄线伽玛射线噪声源GB 1310+487在活动和静止状态下的准同步多波长光谱能量分布。在EC过程中，假设伽玛射线发射区位于宽线区域的外边界和尘埃环面内部，同时考虑了来自宽线区域和尘埃环面的外部种子光子。将模型拟合得到的外光子场能量密度与BLR观测约束的外光子场能量密度进行比较。我们发现gb1310 +487的伽马射线发射区域的位置可以被严格地限制在BLR （γ射线发射区域与中心黑洞的耗散距离）的外缘。从耀斑1到耀斑2，再到耀斑后，辐射团中磁能与发射电子能之比（）逐渐增大，磁能增大，物质能减小。这些结果表明，在GB 1310+487的不同辐射状态下，磁场与物质（辐射电子）能量的转换以及γ射线发射区（或环境光子场）的位置可能起着重要作用。
We employ a single-zone leptonic jet model, with synchrotron, synchrotron self-Compton, and external Compton (EC) processes, to reproduce the quasi-simultaneous multi-wavelength spectral energy distributions in active and quiescent states of the narrow-line gamma-ray-loud radio source GB 1310+487. In the case of the EC process, the external seed photons from both the broad line region (BLR) and the dust torus are considered by assuming that the gamma-ray emission region is located at the outside boundary of the BLR and inside the dust torus. Comparing the energy density of external photon fields obtained by model fitting with that constrained from the BLR observations. We find that the location of the gamma-ray-emitting region of GB 1310+487 can be tightly constrained at the outer edge of the BLR (the dissipation distance of the γ-ray emission region from central black hole ). The ratio of magnetic energy and emitting-electron energy in the radiation blob ( ) is gradually increased from Flare 1, to Flare 2, to Post-flare, where the magnetic energy increases and the matter energy decreases. These results suggest that the conversion of the magnetic field and the matter (radiation electrons) energy and the location of the γ-ray emission region (or ambient photon field) may play an important role in different radiation states of GB 1310+487.