I What is the current status of the Hubble-tension?

[eaglechief]

TL;DR Summary

Different Hubble-parameters occur by obtaining and comparing a) light from the beginning of the universe and b) light from universes mid-age. The discrepancy of the Hubble-parameters is about 15 %

What is the current state of the discussion ? If I understood correctly, a methodical error can be excluded.

Thanks in advance
Carlo

 

[Arman777]

Check Snowmass2021 Papers

[2008.11284] Cosmology Intertwined II: The Hubble Constant Tension (arxiv.org)
[2008.11285] Cosmology Intertwined III: $f σ_8$ and $S_8$ (arxiv.org)

There are 4 of them but I only shared 2. You can look the others

 

[eaglechief]

thank you

 

[Olorin]

Hi, there is a recent study that explains the Hubble tension by invoking we are sitting inside a sub- average density void. It also claims that such a void falsifies the standard model of cosmology with a 7 sigma confidence interval, but it is readily explained by MONDian kind of modified gravity cosmology. Here are the links:
paper: https://academic.oup.com/mnras/artic...2/2845/5939857
explanatory video:
further insights: https://tritonstation.com/2020/10/23/big-trouble-in-a-deep-void

 

[Arman777]

Hi, there is a recent study that explains the Hubble tension by invoking we are sitting inside a sub- average density void. It also claims that such a void falsifies the standard model of cosmology with a 7 sigma confidence interval, but it is readily explained by MONDian kind of modified gravity cosmology. Here are the links:
paper: https://academic.oup.com/mnras/artic...2/2845/5939857
explanatory video:
further insights: https://tritonstation.com/2020/10/23/big-trouble-in-a-deep-void

There are many many theories...This is just one of them

 

[Olorin]

There are many many theories...This is just one of them

Sure, but one that is getting more and more traction as it is being confirmed by a lot of observational evidence coming from a lot of independent studies. 2020 has without any doubt been the year of MOND with a wealth of new data: CMB fit with nuHDM, confirmation of the missing plane of satellites for new host galaxies, External Field Effect demonstration for a large set of galaxies that points towards GR strong equivalence principle violations and the study on the local void. Is the crisis in cosmology now catastrophic?

https://darkmattercrisis.wordpress.com/2020/11/10/the-crisis-in-cosmology-is-now-catastrophic/

 

[kimbyd]

Confirmation does not mean what you seem think it means, Ilorin.

The fundamental problem is that this kind of discrepancy has many possible causes. Latching onto one idea to the exclusion of all others to try to explain every new discrepancy that pops up is just bad science. Especially when that model is on extremely shaky theoretical foundations.

 

[PeterDonis]

one that is getting more and more traction

Your opinion, or MOND enthusiasts' opinion, is not the same as established fact. The current state of the discussion, which is what the OP asked about, is that this is still an open area of research and there is no generally accepted resolution to the issue.

 

[Perezsv]

This video is well explained

explanatory video:

Thank you I will save it

[thread edited by a Mentor to remove an extra link]