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arXiv 2009.05705astro-ph.HE
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跟踪窄线塞弗特1星系Mrk335光谱能量分布的逐年变化

Tracking the year-to-year variation in the spectral energy distribution of the Narrow-line Seyfert 1 Galaxy Mrk335

S. Tripathi, K. M. McGrath, L. C. Gallo, D. Grupe, S. Komossa, M. Berton, G. Kriss, A. L. Longinotti

摘要:

在2007-2019年期间,使用Swift对Mrk 335进行多波长监测,以构建年度光谱能量分布并跟踪逐年变化。使用2007年之前的非同期档案数据来构建亮态SED。在这项工作中,这些变化进行了检查和量化,为未来的SED建模奠定了基础。平均而言,每年的SED有下降趋势,与SED的光学/紫外线部分相比,X射线部分变化显着,并在过去两年获得更低的值。使用光学/UV X射线SED和计算的X射线光度得出的热爱丁顿比显示在监测期间逐渐减少。检查参数随时间的变化。主成分分析表明,主要的变化是在Mrk 335的X射线特性。当观察Mrk 335及其行为的更广泛的图像时,X射线,占13年数据中大部分的可变性,可能是由与日冕或吸收有关的物理过程驱动的,而适度的光学紫外变化表明它们起源于吸积盘中。这些结果与先前使用监测数据的时序分析和深部观测的光谱建模对Mrk 335的解释是一致的。

英文摘要:

Multi-wavelength monitoring of Mrk 335 with Swift between 2007-2019 are used to construct annual spectral energy distributions and track year-to-year changes. Non-contemporaneous archival data prior to 2007 are used to build a bright state SED. In this work, the changes are examined and quantified to build the foundation for future SED modelling. The yearly SEDs trace a downward trend on the average, with the X-ray portion varying significantly and acquiring further lower values in the past two years when compared to the optical/UV portion of SED. The bolometric Eddington ratios derived using optical/UV to X-ray SEDs and the calculated X-ray luminosities show a gradual decrease over the monitoring period. Changes in the parameters over time are examined. Principal component analysis suggests that the primary variability is in the X-ray properties of Mrk 335. When looking at the broader picture of Mrk 335 and its behaviour, the X-rays, accounting most of the variability in the 13-year data, are possibly driven by physical processes related to the corona or absorption whereas the modest optical-UV variations suggest their origin within the accretion disc. These results are consistent with the previous interpretation of Mrk 335 using the timing analyses on the monitoring data and spectral modelling of deep observations.

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