Astronomy Reports ( IF 1 ) Pub Date : 2020-12-30 , DOI: 10.1134/s1063772920120082 V. L. Oknyansky , Kh. M. Mikailov , N. A. Huseynov
Abstract
The results of spectral observations of NGC 3516 with the 2-m telescope of the Shamakhy Astrophysical Observatory during 2016–2019 are presented. In the first half of 2016, the intensive broad component H\(\beta \) was found, which indicates a spectral type change compared to 2014, when the broad component was almost invisible. In the second half of 2016, the broad component H\(\beta \) again was weakened and was practically not observed, remaining weak until the end of 2019. At the end of 2019, the broad component H\(\beta \) strengthened again, and in May 2020 reached a typical level for the high state of the object. During 2016–2020 we observed several changing looks of NGC 3516.
中文翻译:
塞弗特银河NGC 3516核在2016–2020年期间的变化
摘要
介绍了2016-2019年期间Shamakhy天体观测站用2-m望远镜对NGC 3516进行的光谱观测结果。在2016年上半年,发现了密集的宽分量H \(\ beta \),这表明与2014年相比光谱类型发生了变化,当时宽分量几乎是不可见的。在2016年下半年,广义分量H \(\ beta \)再次被削弱并且几乎没有观察到,直到2019年底仍然保持疲软。在2019年底,广义分量H \(\ beta \)再次增强,并在2020年5月达到了高水平物体的典型水平。在2016–2020年期间,我们观察到NGC 3516的外观有所变化。