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arXiv 2101.09694astro-ph.HEastro-ph.GA
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F01004-2237中潮汐扰动事件的光谱监测

Spectroscopic monitoring of the candidate tidal disruption event in F01004-2237

Giacomo Cannizzaro, Peter G. Jonker, Daniel Mata-Sánchez

摘要:

本文介绍了超亮红外星系F01004-2237的光谱监测观测结果。这个星系被观察到其光谱发生了变化,通过比较2015年的光谱和2000年的光谱来检测。这些变化与光度增亮一致。在光谱中检测到的主要变化是增强的He II $λ$ 4686发射和He I $λ$ 3898、$λ$ 5876发射线的出现。对这些变化的有利解释是2010年发生的潮汐中断事件(TDE)。然而,随后的工作表明,这些变化是由另一个迄今未知的原因引起的,与活动星系核(AGN)吸积率的变化有关。我们的光谱监测观测表明,He线的演化与TDE中观察到的演化一致,而与AGN混响绘图研究中观察到的演化相反,重新讨论了将耀斑解释为TDE的讨论。

英文摘要:

We present results of spectroscopic monitoring observations of the Ultra-Luminous Infra Red Galaxy F01004-2237. This galaxy was observed to undergo changes in its optical spectrum, detected by comparing a spectrum from 2015 with one from 2000. These changes were coincident with photometric brightening. The main changes detected in the optical spectrum are enhanced He II $λ$4686 emission and the appearance of He I $λ$3898,$λ$5876 emission lines. The favoured interpretation of these changes was that of a tidal disruption event (TDE) happening in 2010. However, subsequent work suggested that these changes are caused by another hitherto unknown reason related to variations in the accretion rate in the active galactic nucleus (AGN). Our optical spectroscopic monitoring observations show that the evolution of the He lines is in line with the evolution seen in TDEs and opposite of what observed from reverberation mapping studies of AGNs, renewing the discussion on the interpretation of the flare as a TDE.

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