I Latest Findings from DESI Collaboration

  • I
  • Thread starter Thread starter MrRobotoToo
  • Start date Start date
  • Tags Tags
    Cosmology Hubble
AI Thread Summary
Dr. Smethurst presented the latest findings from the DESI collaboration, highlighting that their measurement of the Hubble constant aligns well with the Lambda-CDM model based on Planck data. However, this does not resolve the ongoing Hubble tension, as numerous late-time measurements still yield inconsistent values. A significant outcome from DESI is the indication that the sum of the three neutrino masses is lower than the minimum derived from neutrino oscillation data. The discussion emphasizes the need to reconcile various credible measurements of the Hubble constant to address the discrepancies. The pursuit of resolving these tensions continues to challenge researchers in the field.
Space news on Phys.org
The more notable finding from DESI, in my humble opinion, is that it favors a sum of the three neutrino masses which is less than the minimum value of that quantity derived from neutrino oscillation data. See Nathaniel Craig, Daniel Green, Joel Meyers, Surjeet Rajendran, "No νs is Good News" arXiv:2405.00836 (May 1, 2024).

A DESI Hubble Constant value consistent with the Planck CMB based estimate doesn't solve the Hubble tension because there are still plenty of late time measurements of the Hubble constant with values inconsistent with that lower CMB based value. Adding one more measurement to the mix doesn't resolve the fact that we have different values from what are each credible ways to do the measurement. We need to figure out how to reconcile all of the credible measurements of the Hubble constant to resolve the tension. See my previous discussion of this issue here.
 
And T2K + NoVA see the opposite with respect to the hierarchy.

You can drive yourself crazy chasing one and two sigma tensions. Excited theorists just add entropy - you can't get a paper that says "wait and see" published.
 

Thread 'Illuminating Black Hole Shadows with Dark Matter Annihilation'

Abstract The Event Horizon Telescope (EHT) has significantly advanced our ability to study black holes, achieving unprecedented spatial resolution and revealing horizon-scale structures. Notably, these observations feature a distinctive dark shadow—primarily arising from faint jet emissions—surrounded by a bright photon ring. Anticipated upgrades of the EHT promise substantial improvements in dynamic range, enabling deeper exploration of low-background regions, particularly the inner shadow...
View full post »

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
View full post »

Similar threads

I Has JWST solved the crisis in cosmology?
Replies
2
Views
3K
I Questions on the consequence of an evolving dark energy parameter
Replies
1
Views
1K
I New H0LiCOW result: Hubble constant is 73.3 +1.7-1.8 km/(s*Mpc)
Replies
29
Views
7K
Insights Dark Energy Part 2: LCDM Cosmology
Replies
0
Views
2K
I The Hubble constant − constant in what way?
Replies
18
Views
2K
I Discover the Latest Cosmological Parameters for the CDM Lambda Concordance Model
Replies
3
Views
2K
I Is There Evidence to Suggest Our Universe is Anisotropic?
Replies
8
Views
3K
I New Hubble Paper On Lensing In Galactic Clusters
Replies
2
Views
2K
I Penrose's Latest Paper on CCC: Evidence or Wishful Thinking?
Replies
6
Views
6K
Concordance value of Hubble growth rate (2014)
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top