Confirmation of a Problem With Gravity Nobody Can Explain : S8 Tension

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Canada Anton Petrov
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Hello and welcome! My name is Anton and in this video, we will talk about the new problem in cosmology - S8 tension
Links:
https://ras.ac.uk/news-and-press/news/astronomers-carry-out-largest-ever-cosmological-computer-simulation
https://arxiv.org/pdf/2304.05203.pdf
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.131.111001
https://academic.oup.com/mnras/article/526/4/4978/7246074
https://academic.oup.com/mnras/article/526/4/6103/7291940
https://academic.oup.com/mnras/article/526/4/4978/7246074
https://pirsa.org/23050129
Hubble confirmed the tension: https://youtu.be/ZtnY5EftDPo
Anothe Hubble tension video: https://youtu.be/ZCCDkCbYd_w
#s8tension #s8 #cosmology

0:00 Another cosmological problem?
0:40 S8 tension?
1:05 History of how we found dark energy
2:00 Hubble tension and problem with the expansion
2:35 Clumpiness of matter seems to be different
4:15 CMB calculations of clumpiness show a problem
5:10 Could MOND save us?
5:45 Could dark energy have changed with time?
6:01 Could this be galactic winds?
6:30 Could this be a bias?
6:50 FLAMINGO calculation try to resolve this
7:35 No sufficient explanation yet
8:20 Why this simulation is so extreme
9:10 So now we have two problems to deal with
9:45 Another weird observation...new phenomenon?

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