Black Holes and Dark Matter

In summary, there is more dark matter than normal matter observed in a galaxy and there is also a lot more dark energy than dark matter. Black holes cannot be considered as a source of dark matter as they only contribute a small amount to the total mass of a galaxy. Additionally, the remnants of past black holes are unlikely to be the source of dark matter as they have already been detected and accounted for.
  • #1
jgreene
3
0
Is the amount of Dark Matter in a Galaxy equal the amount of Matter consumed by all the Black Holes in that Galaxy?
 
Astronomy news on Phys.org
  • #2
No sir. There is more dark matter than "normal matter" observed in the galaxy.
 
  • #3
thanks, follow up question: is the amount of Dark Energy equal to the amount of matter consumed by Black Holes?
 
  • #4
jgreene said:
thanks, follow up question: is the amount of Dark Energy equal to the amount of matter consumed by Black Holes?

There is a lot more dark energy than dark matter, which as previously noted is a lot more than black holes.
 
  • #5
Is it just me or might black holes be dark matter factories? If currently detectable matter is annihilated inside a black hole down to constituent parts that even we have not yet detected, could this be dark matter? Could this be released as the black hole evaporates (is that the right term?). If this was a yet undetected smallest possible constituent of matter, why would we be able to detect it unless as a part of massive fields of dark matter? Information cannot be destroyed but it can be transformed and surely we cannot yet know what it's ultimate transformation might be? When searching for an almost invisible, weakly interacting particle wouldn't the remnants of a once massive black hole be the obvious place to look?

Does the universe appear as more massive because of dark matter left over from many past black holes long since evaporated?
 
  • #6
Hoeby said:
Is it just me or might black holes be dark matter factories? If currently detectable matter is annihilated inside a black hole down to constituent parts that even we have not yet detected, could this be dark matter? Could this be released as the black hole evaporates (is that the right term?). If this was a yet undetected smallest possible constituent of matter, why would we be able to detect it unless as a part of massive fields of dark matter? Information cannot be destroyed but it can be transformed and surely we cannot yet know what it's ultimate transformation might be? When searching for an almost invisible, weakly interacting particle wouldn't the remnants of a once massive black hole be the obvious place to look?

Does the universe appear as more massive because of dark matter left over from many past black holes long since evaporated?

I think it's just you. See above.
 
  • #7
Student100 said:
I think it's just you. See above.
Yes I read the previous posts but that seems to refer to current black holes only, not ones long past and evaporated. What if undetectable matter left over from them is dark matter?
 
Last edited:
  • #8
One can go and insist that all dark matter could be stored as primordial micro BH left from early Universe.
They could be here and there but as yet not detected.
 
  • #9
Martin0001 said:
One can go and insist that all dark matter could be stored as primordial micro BH left from early Universe.
They could be here and there but as yet not detected.
Okay but why would someone insist such a thing?
 
  • #10
@Hoeby: please start a new thread for new questions, this one is from 2014.

Anyway, the answer to all your questions is "no".
 

1. What is a black hole?

A black hole is a region in space where the gravitational pull is so strong that nothing, including light, can escape from it. It is formed when a massive star dies and collapses under its own gravity.

2. How are black holes detected?

Black holes cannot be directly observed because they do not emit any light. Instead, scientists detect them by observing the effects of their strong gravitational pull on surrounding matter, such as stars and gas.

3. What is dark matter?

Dark matter is a form of matter that does not emit or interact with light, making it invisible to telescopes. It is believed to make up about 85% of all matter in the universe and is responsible for the observed gravitational effects in galaxies.

4. How is dark matter different from regular matter?

Dark matter is different from regular matter because it does not interact with light or any other form of electromagnetic radiation. It also does not interact with itself or with regular matter through the strong or weak nuclear forces, making it difficult to detect.

5. Why is the study of black holes and dark matter important?

Studying black holes and dark matter can help us better understand the structure and evolution of the universe. By studying their effects on surrounding matter, we can also gain insight into the laws of gravity and the nature of space and time.

Similar threads

  • Astronomy and Astrophysics
Replies
1
Views
1K
  • Astronomy and Astrophysics
Replies
11
Views
638
  • Astronomy and Astrophysics
Replies
5
Views
736
  • Astronomy and Astrophysics
Replies
12
Views
1K
Replies
14
Views
2K
  • Astronomy and Astrophysics
Replies
4
Views
1K
  • Astronomy and Astrophysics
Replies
13
Views
1K
  • Astronomy and Astrophysics
Replies
32
Views
2K
  • Astronomy and Astrophysics
2
Replies
40
Views
3K
  • Astronomy and Astrophysics
Replies
1
Views
972
Back
Top