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Hello and welcome! My name is Anton and in this video, we will talk about a galaxy becoming active in just 5 years
Links:
https://www.aanda.org/component/artic...
https://www.eso.org/public/news/eso24...
Green echoes:    • Bizarre Green Galaxy Found, But Green...  
Tidal disruption events:    • Tidal Disruption Event Updates: Stran...  
#agn #astronomy #blackhole

0:00 First ever activation of a central black hole
0:40 What are AGNs?
2:15 How it all started: 3c 273
3:10 Why these objects are important
4:10 Shut down AGN creating echoes
5:40 Discovery that surprised everyone
7:00 Why this is important
7:50 Alternative explanations and conclusions

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Credit:
Emma Alexander CC BY 4.0 https://en.wikipedia.org/wiki/Active_...
Keel et al., 2015

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