arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.3084astro-ph.HEastro-ph.CO
收藏

快速可变性:我们从射流中相关的mm-/ gamma-ray可变性中学到了什么?

Rapid Variability: What do we learn from correlated mm-/gamma-ray variability in jets ?

B. Rani, T. P. Krichbaum, L. Fuhrmann, B. Lott, M. Boettcher, J. A. Zensus

摘要:

在过去的三年中,对极端BL Lac天体S5 0716+714进行了密集的时间采样多频通量测量,使我们能够研究其宽带变化和详细的基本物理,重点是发射区域的位置和大小以及随时间的演变。我们研究了一些突出的毫米/伽玛射线耀斑的背景下的冲击喷流模型的特点,并调查的高能发射区的位置。射电耀斑的快速上升和衰减与激波的形成及其演化是一致的,如果除了源的本征变化之外还包括几何变化的话。我们发现在伽马射线和射频通量变化之间的相关性的证据。γ射线和射电耀斑之间的两个月的时间延迟表明,在S5 0716+714的γ射线和射电通量变化的非共空间起源。

英文摘要:

Densely time sampled multi-frequency flux measurements of the extreme BL Lac object S5 0716+714 over the past three years allow us to study its broad-band variability, and the detailed underlying physics, with emphasis on the location and size of the emitting regions and the evolution with time. We study the characteristics of some prominent mm-/gamma-ray flares in the context of the shock-in-jet model and investigate the location of the high energy emission region. The rapid rise and decay of the radio flares is in agreement with the formation of a shock and its evolution, if a geometrical variation is included in addition to intrinsic variations of the source. We find evidence for a correlation between flux variations at gamma-ray and radio frequencies. A two month time-delay between gamma-ray and radio flares indicates a non-cospatial origin of gamma-rays and radio flux variations in S5 0716+714.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑