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arXiv 2102.07328astro-ph.HE
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$γ$射线亮度与喷流磁化强度以及相对论电子注入功率之间的相关性：Mrk 421、3C 454.3和3C 279的情况

Correlations between $γ$-ray luminosity and magnetization of the jet as well as relativistic electron injection power:cases for Mrk 421, 3C 454.3 and 3C 279

Wen Hu, Da-hai Yan, Qiang-lin Hu

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17 pages, 38 figures, 2 tables; Accepted for publication in MNRAS
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摘要：

利用单区轻子喷流模型拟合多个历元的高质量同步多波长光谱能量分布，研究了三颗著名的耀变体Mrk 421、3C 454.3和3C 279的喷流性质.在喷流模型中，通过求解电子注入、逃逸、绝热和辐射能量损失的动力学方程，计算了发射电子的能量分布。为了系统地探索多维参数空间，我们采用马尔可夫链蒙特卡罗（MCMC）拟合技术。我们在这里推导的发射区的性质与以前的研究一致，例如，以颗粒为主的低磁化射流。新的发现是：$γ$射线亮度与电子注入功率之间存在紧密的相关关系，而$γ$射线亮度与喷流磁化参数之间存在反相关关系。结果表明，在不同类型的耀变体喷流中可能存在着相同的能量耗散机制（如激波），而$γ$射线耀斑的起源与粒子加速过程有关。

英文摘要：

By fitting high-quality and simultaneous multi-wavelength (MWL) spectral energy distributions (SEDs) at multiple epochs with a one-zone leptonic jet model, we study jet properties of the three famous blazars Mrk 421, 3C 454.3 and 3C 279. In the jet model, the emitting electron energy distributions (EEDs) are calculated by solving the kinetic equation of electron injection, escape, adiabatic and radiative energy losses. To explore multi-dimensional parameter space systematically, we employ a Markov chain Monte Carlo (MCMC) fitting technique. The properties of emission regions we derived here are consistent with those in previous studies, e.g., the particle-dominated and low-magnetization jet. The new finding is that there is a tight correlation between $γ$-ray luminosity and electron injection power and an anti-correlation between $γ$-ray luminosity and jet magnetization parameter. The results suggest that same energy-dissipative mechanism (like a shock) could be operating in the jets of different types of blazars, and the origin of $γ$-ray flares is associated with the particle acceleration process.

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