|
| | | | |
| | | |
| Stat |
Members: 3665
Articles: 2'599'751
Articles rated: 2609
25 January 2025 |
|
| | | | |
|
Article overview
| |
|
|
JWST high redshift galaxy observations have a strong tension with Planck CMB measurements | | Deng Wang
; Yizhou Liu
; | | Date: |
1 Jan 2023 | | Abstract: | JWST high redshift galaxy observations predict a higher star formation
efficiency than the standard cosmology does, which poses a new tension to
$Lambda$CDM. We find that the situation is worse than expected. The true
situation is that the Planck CMB measurement has a strong tension with JWST
high redshift galaxy observations. Specifically, we make a trial to alleviate
this tension by considering alternative cosmological models including dark
matter-baryon interaction, $f(R)$ gravity and dynamical dark energy. Within
current cosmological constraints from Planck-2018 CMB data, we find that these
models all fail to explain such a large tension. A possible scenario to escape
from cosmological constraints is the extended Press-Schechter formalism, where
we consider the local environmental effect on the early formation of massive
galaxies. Interestingly, we find that an appropriate value of nonlinear
environmental overdensity of a high redshift halo can well explain this
tension. | | Source: | arXiv, 2301.00347 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
REGISTER