论文标题

TEV Blazar 1ES 1ES 1727+502在2014年至2021年的多波长度和光谱研究

Multiwavelength temporal and spectral study of TeV blazar 1ES 1727+502 during 2014 to 2021

论文作者

Prince, Raj, Khatoon, Rukaiya, Majumdar, Pratik, Czerny, Bożena, Gupta, Nayantara

论文摘要

Blazar物理学中最重要的问题之一是宽带发射和快速变化的起源。在这项工作中,我们研究了TEV Blazar 1ES 1727+502的宽带时间和光谱特性,并探索了单区同步辅助康普顿(SSC)模型,以适合宽带光谱分布(SED)。我们收集了长期(2014-2021)的多播数据,其中包括源头的低通量和高通量状态。然后将整个光曲线分为不同通量状态的三个段,然后比较通过与三个通量状态相对应的宽带SED模型获得的最佳拟合参数。已经观察到Tev Blazar 1ES 1727+502显示了X射线中最明亮的耀斑发作,然后是光学-UV和伽马射线。在多个波段中,估计的各个段中估计的分数变异性的行为不同,表明该来源的发射性质复杂。在2014 - 2021年之间的这一长期观察期间,该来源显示了从天数到月尺度的一系列可变性时间。 X射线中并不明显,而在光学UV中可以看到“较难的当时”趋势,并且在伽马射线中观察到了相反的趋势。观察到各个频段之间相关性的复杂性质。 SED建模表明,单区SSC发射模型可以在从光学-UV到非常高的能量伽马射线的能量范围内重现宽带光谱。

One of the most important questions in blazar physics is the origin of broadband emission and fast-flux variation. In this work, we studied the broadband temporal and spectral properties of a TeV blazar 1ES 1727+502 and explore the one-zone synchrotron-self Compton (SSC) model to fit the broadband spectral energy distribution (SED). We collected the long-term (2014-2021) multiband data which includes both the low and high flux states of the source. The entire light curve is divided into three segments of different flux states and the best-fit parameters obtained by broadband SED modeling corresponding to three flux states were then compared. The TeV blazar 1ES 1727+502 has been observed to show the brightest flaring episode in X-ray followed by optical-UV and gamma-ray. The fractional variability estimated during various segments behaves differently in multiple wavebands, suggesting a complex nature of emission in this source. This source has shown a range of variability time from days scale to month scale during this long period of observations between 2014-2021. A "harder-when-brighter" trend is not prominent in X-ray but seen in optical-UV and an opposite trend is observed in gamma-ray. The complex nature of correlation among various bands is observed. The SED modeling suggests that the one-zone SSC emission model can reproduce the broadband spectrum in the energy range from optical-UV to very high energy gamma-ray.

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