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arXiv 1806.01693astro-ph.HE
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FSRQ 3C 279的多波长光度和分光偏振分析

Multiwavelength Photometric and Spectropolarimetric Analysis of the FSRQ 3C 279

V. M. Patiño-Álvarez, S. Fernandes, V. Chavushyan, E. López-Rodríguez, J. León-Tavares, E. M. Schlegel, L. Carrasco, J. Valdés, A. Carramiñana

摘要:

在本文中,我们展示了3C 279在2008年至2014年的六年时间内的光变曲线。我们的多波长数据包括1毫米到伽马射线,以及额外的光学偏振测量。基于伽马射线光变曲线相对于其他波段的行为,我们确定了三个不同的活动期。其中一个活动期显示出异常行为,没有与光学和近红外耀斑相关的伽马射线对应物。另一个异常活动期显示了伽马射线、1 mm和偏振度的耀斑,但在紫外连续谱、光学和近红外波段没有对应的耀斑。我们发现一个显着的整体相关性的紫外连续辐射,光学和近红外波段。这种相关性表明,近红外到紫外连续光谱是共空间的。我们还发现了紫外连续谱和1 mm数据之间的相关性,这意味着产生紫外连续谱的主导过程是同步辐射。伽马射线光谱指数显示出统计上显着的变化和反相关的伽马射线光度。我们证明,占主导地位的伽马射线发射机制在3C 279随时间的变化。或者,伽马射线发射区本身的位置可以根据中央引擎的活动状态而改变。

英文摘要:

In this paper, we present light curves for 3C 279 over a time period of six years; from 2008 to 2014. Our multiwavelength data comprise 1 mm to gamma-rays, with additional optical polarimetry. Based on the behaviour of the gamma-ray light curve with respect to other bands, we identified three different activity periods. One of the activity periods shows anomalous behaviour with no gamma-ray counterpart associated with optical and NIR flares. Another anomalous activity period shows a flare in gamma-rays, 1 mm and polarization degree, however, it does not have counterparts in the UV continuum, optical and NIR bands. We find a significant overall correlation of the UV continuum emission, the optical and NIR bands. This correlation suggests that the NIR to UV continuum is co-spatial. We also find a correlation between the UV continuum and the 1 mm data, which implies that the dominant process in producing the UV continuum is synchrotron emission. The gamma-ray spectral index shows statistically significant variability and an anti-correlation with the gamma-ray luminosity. We demonstrate that the dominant gamma-ray emission mechanism in 3C 279 changes over time. Alternatively, the location of the gamma-ray emission zone itself may change depending on the activity state of the central engine.

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。

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