论文标题
正在进行的更换外观AGN AT2021FXU的多波长研究
A Multiwavelength study of the ongoing Changing-look AGN AT2021fxu
论文作者
论文摘要
我们介绍了主动光学瞬态AT2021FXU的多波长分析，该分析显示了在最近的光谱中以前不存在的宽发射线的出现，这表明更换（CL）活性银河系核（AGN）。 During the spectral transition, the brightness in the individual photometric bands increased up to $\approx$0.6 in the optical bands and up to $\approx$1.1 magnitudes in the UV bands.亮度伴随着光谱的蓝色偏移。 AT2021FXU在爆发前后显示高X射线（0.3-10 KEV）的通量变异性，平均X射线通量增加了$ \ $ \ $ \ $ \ $ \ $ 2。但是，X射线频谱形状保持大致相同，视线线密度没有显着变化。 AT2021FXU的整体属性与从II类型II到1型AGN的积聚率驱动的过渡一致。
We present multiwavelength analyses of an active optical transient AT2021fxu which shows the appearance of previously absent broad emission lines in a recent optical spectrum, suggesting a Changing-look (CL) Active Galactic Nucleus (AGN). During the spectral transition, the brightness in the individual photometric bands increased up to $\approx$0.6 in the optical bands and up to $\approx$1.1 magnitudes in the UV bands. The brightening was accompanied by a blueward shift of the optical spectrum. AT2021fxu shows high X-ray (0.3-10 keV) flux variability before and after the outburst, with the average X-ray flux increasing by a factor of $\approx$2 post-outburst. However, the X-ray spectral shape remains roughly the same, with no significant change in the line-of-sight column density. AT2021fxu's overall properties are consistent with an accretion-rate-driven transition from a Type-II to a Type-1 AGN.
