Changing Looks of the Nucleus of Seyfert Galaxy NGC 3516 during 2016–2020статья
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Дата последнего поиска статьи во внешних источниках: 17 февраля 2021 г.
Аннотация:The results of spectral observations of NGC 3516 with the 2-m telescope of the Shamakhy AstrophysicalObservatory during 2016–2020 are presented. In the first half of 2016, the intensive broad componentH was found, which indicates a spectral type change compared to 2014, when the broad componentwas almost invisible. In the second half of 2016, the broad component H again was weakened and was practicallynot observed, remaining weak until the end of 2019. At the end of 2019, the broad component Hstrengthened 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.