• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >IMPLICATIONS OF VARIABILITY PATTERNS OBSERVED IN TeV BLAZARS ON THE STRUCTURE OF THE INNER JET
【24h】

IMPLICATIONS OF VARIABILITY PATTERNS OBSERVED IN TeV BLAZARS ON THE STRUCTURE OF THE INNER JET

机译：TeV Blazars中观察到的变异性模式对内射流结构的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The recent long-look X-ray observations of TeV blazars have revealed many important new features concerning their time variability. In this paper we suggest a physical interpretation for those features based on the framework of the internal and external shock scenarios. We present a simplified model applicable to TeV blazars and investigate through simulations how each of the model parameters would affect the observed light curve or spectrum. In particular, we show that the internal shock scenario naturally leads to all the observed variability properties, including the structure function, but for it to be applicable, the fractional fluctuation of the initial bulk Lorentz factors must be small, σ_Γ~′≡σ_Γ/Γ_(vag) 0.01. This implies very low dynamical efficiency of the internal shock scenario. We also suggest that several observational quantities―such as the characteristic timescale, the relative amplitude of flares as compared to the steady ("offset") component, and the slope of the structure function―can be used to probe the inner jet. The results are applied to the TeV blazar Mrk 421, and this, within the context of the model, leads to the determination of several physical parameters: the ejection of a shell with average thickness of ～10~(13) cm occurs on average every 10 minutes, and the shells collide ～10~(17) cm away from the central source.
机译：最近对TeV blazar进行的长距离X射线观察发现了许多有关其时间可变性的重要新特征。在本文中，我们建议根据内部和外部冲击场景的框架对这些功能进行物理解释。我们提出了适用于TeV blazars的简化模型，并通过仿真研究了每个模型参数如何影响观察到的光曲线或光谱。特别是，我们表明内部冲击场景自然会导致所有观察到的可变性，包括结构函数，但要使其适用，初始整体洛伦兹因子的分数波动必须很小，σ_Γ〜'≡σ_Γ/ Γ_（vag） 0.01。这意味着内部冲击场景的动态效率非常低。我们还建议，可以使用几个观测量（例如特征时标，与稳定（“偏移”）分量相比的耀斑相对振幅以及结构函数的斜率）来探测内部射流。将结果应用于TeV blazar Mrk 421，这在模型的上下文中可以确定几个物理参数：平均每次平均发生约10〜（13）cm的壳弹射10分钟后，炮弹与中心震源相撞〜10〜（17）cm。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号