Why is there any residual angular momentum left over from the big bang

In summary, the question is whether the residual angular momentum in the universe can be explained by the Anthropic principle and what insights can be gained about the early universe through statistics of this angular momentum. However, there are considerations about defining a global conserved angular momentum and measuring it beyond the observable part of the universe, as well as the fact that galaxies have a different origin for their angular momentum.
  • #1
taylrl3
61
0
Hi,

I'm basically wondering why there is any residual angular momentum in the universe left over from the big bang at all. Can this be explained by the Anthropic principle and could statistics surrounding angular momentum tell us anything about the early universe?

Cheers,
Taylrl
 
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  • #2
Be careful with all the things your question implies:
How do you define a global conserved angular momentum, where do you see this angular momentum today (and how do you measure it beyond the borders of the observable part of the universe?), and why do you expect zero initial angular momentum?

Galaxies have angular momentum, but that has a different origin.
 

1. Why is there any residual angular momentum left over from the big bang?

The big bang theory states that the universe began as a singularity, a point of infinite density and temperature. As the singularity expanded, it began to rotate, creating angular momentum. This rotation has continued to this day, leaving behind residual angular momentum in the universe.

2. How does residual angular momentum affect the formation of galaxies and other structures?

Residual angular momentum plays a crucial role in the formation of galaxies and other large-scale structures in the universe. As matter collapsed under the force of gravity, the angular momentum caused it to form into a disc shape, leading to the formation of spiral galaxies. Without this residual angular momentum, galaxies would not have the unique shape and structure that we observe.

3. Is there a limit to the amount of residual angular momentum in the universe?

Yes, there is a limit to the amount of residual angular momentum that can exist in the universe. This limit is known as the critical angular momentum and is determined by the mass and size of the universe. If the universe had more angular momentum than the critical value, it would have expanded too quickly and would not have been able to form structures like galaxies.

4. Can residual angular momentum change over time?

Yes, residual angular momentum can change over time as the universe continues to expand. As galaxies and other structures interact and merge, their angular momentum can be transferred and redistributed. This can also occur due to the effects of dark matter, which can influence the rotation of galaxies and affect their overall angular momentum.

5. How does the study of residual angular momentum help us understand the early universe?

Studying residual angular momentum allows us to better understand the conditions and processes that existed in the early universe. It provides valuable insights into the formation and evolution of galaxies, as well as the distribution of matter in the universe. By analyzing the amount and distribution of residual angular momentum, scientists can test and refine theories about the origins of the universe.

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