I What is the reason for density perturbations in the CMB?

timmdeeg
Gold Member
Messages
1,544
Reaction score
342
I could not find an answer by checking the web. Could these perturbations originate from primordial black holes? What else?
 
Space news on Phys.org

Thread 'Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo"'

The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
View full post »

Similar threads

I Cosmic Flatness Deduced from CMB
Replies
4
Views
2K
B Can we observe anything beyond the CMB 'wall'?
Replies
5
Views
3K
I Why do we still see the CMB today?
3
Replies
103
Views
10K
B Does the CMB itself tell us that it started at 3000K?
Replies
23
Views
2K
I The CMB drag on an object moving through space
Replies
6
Views
2K
I Is the supply of the observable CMB radiation limited?
2
Replies
50
Views
4K
A How are parameters in inflation models tuned to align with CMB constraints?
Replies
1
Views
1K
I Questions about bayronic acoustic oscillations
Replies
9
Views
3K
I CMB creation, distance measurement question
Replies
7
Views
2K
A Gravitational Instability and accelerated explanation of Universe?
Replies
19
Views
2K