Exploring Dark Matter and Black Holes: Density in the Sun and Energy Release

In summary: The article below would be helpful. Galaxy Collision Separates Out the Dark Matterby Fraser Cain on August 21, 2006http://www.universetoday.com/502/galaxy-collision-separates-out-the-dark-matter/
  • #1
sweet springs
1,223
75
Hi.
1) Is density of dark matter in the center of the Sun larger than the surroundings ?

2) Do dark matter fall into black holes? If so how energy is released outward?

Regards.
 
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  • #2
1. Although there are possible ways in which DM is able to get rid of energy, thus become bound to some structure (very important for early universe structure formation), I don't think that density of DM in the center of the Sun is larger then the surroundings.

2. Yes, dark matter does fall into the black holes. It does not experience friction, which helps normal matter to spiral into the black hole by radiating energy. So, in a sense, dark matter falls less then ordinary matter into the black holes, as they represent smaller targets for DM. Energy is not released outward, because it is a black hole.
 
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  • #3
Hi, Calimero.

Thank you for your reply. Considering it further I have the following idea.

DM particles surrounding the galaxy are in oscillating motion around the center of gravity with no collision or friction with other particles and ordinary matter. Density of DM particle are roughly proportional to exp(-(R/L)^2) where R is distance from the center of gravity and L is appropriate parameter of dimension of length. During this motion some DM particles disappear trapped by BHs.

Regards
 
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  • #4
Calimero said:
1. Although there are possible ways in which DM is able to get rid of energy, thus become bound to some structure (very important for early universe structure formation), I don't think that density of DM in the center of the Sun is larger then the surroundings.

2. Yes, dark matter does fall into the black holes. It does not experience friction, which helps normal matter to spiral into the black hole by radiating energy. So, in a sense, dark matter falls less then ordinary matter into the black holes, as they represent smaller targets for DM. Energy is not released outward, because it is a black hole.

I'm sorry, maybe I am missing information, but where is the basis for your claim that dark matter does not experience friction?
 
  • #5
Dark matter is collisionless, hence no friction. So, yes, you are missing information.
 
  • #6
Going a little off topic here, so stop me if this is too large a tangent, but how do we know Dark Matter is collisionless?
 
  • #7

1. What is dark matter and why is it important to study?

Dark matter is a type of matter that does not emit or absorb light, making it invisible to traditional telescopes. However, its presence can be inferred through its gravitational effects on visible matter. It is important to study because it makes up about 85% of the total mass in the universe and understanding its properties can help us better understand the formation and evolution of galaxies.

2. How is the density of the Sun related to dark matter and black holes?

The density of the Sun is not directly related to dark matter and black holes. However, the gravitational pull of dark matter and black holes can affect the distribution and movement of matter within the Sun, leading to changes in its density.

3. What is the role of energy release in understanding dark matter and black holes?

Energy release, such as the release of radiation, can be used as a tool to study the effects of dark matter and black holes. For example, analyzing the energy released from black holes can give insights into their properties and the behavior of surrounding dark matter.

4. Can dark matter and black holes be observed directly?

No, neither dark matter nor black holes can be observed directly using traditional telescopes. However, scientists can indirectly study their effects on visible matter and use this information to make inferences about their properties.

5. What are some current research efforts in exploring dark matter and black holes?

Some current research efforts include using large-scale simulations to study the behavior of dark matter, studying the effects of dark matter on galaxy formation and evolution, and using advanced techniques such as gravitational lensing to indirectly observe black holes. Scientists are also working to develop new methods for detecting and studying dark matter and black holes directly.

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