A possible origin for the very-high-energy photons from BL Lac object S4 0954+65 as observed on Feb 14 2015

A possible origin for the very-high-energy photons from BL Lac object S4 0954+65 as observed on Feb 14 2015
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2015 年 2 月 14 日观测到的 BL Lac 天体 S4 0954 65 极高能光子的可能来源

DOI:
10.1007/s10509-022-04070-5
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发表时间:
2022-05
期刊:
Springer Nature
影响因子:
--
通讯作者:
R. X. Zhou
R. X. Zhou
中科院分区:
其他
文献类型:
--
作者:
J. H. Deng;Shaoming Hu;Z. J. Jiang;Y. C. Xiang;R. X. Zhou

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2015年2月至3月,在BLLac S40954+65观测到一次强烈耀斑。魔术望远镜在上升阶段探测到了极高能量的(Vhe,(>150~Mbox{GeV}))光子,而在其他时间段则没有探测到这样的高能光子。分析粒子输运模型包含了blazar喷流中的各种物理机制。基于这个模型,我们提出了一种关于VHE光子起源的设想。通过将外部康普顿软光子的温度从800K提高到45000 K,可以重现包含幻数据点的多波长光谱能量分布。结果表明,尽管S40954+65是一个BLLac类天体,但当发射区距离喷流底部较近时,宽线区仍可能对逆康普顿过程有贡献。
An intense flare in BL Lac S4 0954+65 was detected from February to March in 2015. Very-high-energy (VHE, (>150~mbox{GeV})) photons in the rising phase were detected by the MAGIC telescopes, while no such high energy photons were detected during other periods. The analytical particle transport model contains a variety of physical mechanisms in the jets of a blazar. Based on this model, we propose a scenario for the origin of the VHE photons. By increasing the temperature of the external Compton soft photons ranging from 800 to 45000 K, the multiwavelength spectral energy distribution containing MAGIC data points can be reproduced. The result suggests that the broad line region still may contribute to the inverse-Compton process when the emission zone is closer to the base of the jet, despite the fact that S4 0954+65 is a BL Lac type object.
与时间相关的粒子加速和发射模型:了解粒子光谱演化和耀斑耀斑
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