Is Dark Matter Consumption by Black Holes Equal in a Galaxy?

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Discussion Overview

The discussion revolves around the relationship between dark matter, dark energy, and black holes within a galaxy. Participants explore whether the amount of dark matter is equivalent to the matter consumed by black holes, as well as the potential role of black holes in the creation or transformation of dark matter and dark energy.

Discussion Character

  • Debate/contested
  • Exploratory
  • Conceptual clarification

Main Points Raised

  • Some participants assert that there is more dark matter in a galaxy than normal matter, suggesting a disparity between dark matter and the matter consumed by black holes.
  • There is a claim that dark energy is present in much greater quantities than dark matter, which in turn is more abundant than the matter consumed by black holes.
  • A participant speculates that black holes could act as "dark matter factories," proposing that matter consumed by black holes might be transformed into undetectable constituents that could be considered dark matter.
  • Another participant questions the idea of black holes as dark matter factories, suggesting that undetectable matter left over from evaporated black holes could potentially be dark matter.
  • Some participants propose that primordial micro black holes from the early universe could account for dark matter, although the rationale behind this assertion is questioned.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between dark matter, dark energy, and black holes. There is no consensus on whether black holes contribute to dark matter or if primordial black holes are a valid explanation for dark matter's existence.

Contextual Notes

Some claims rely on assumptions about the nature of dark matter and dark energy, as well as the properties of black holes. The discussion includes unresolved questions about the transformation of matter within black holes and the implications for dark matter detection.

jgreene
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Is the amount of Dark Matter in a Galaxy equal the amount of Matter consumed by all the Black Holes in that Galaxy?
 
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No sir. There is more dark matter than "normal matter" observed in the galaxy.
 
thanks, follow up question: is the amount of Dark Energy equal to the amount of matter consumed by Black Holes?
 
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.
 
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?
 
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.
 
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:
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.
 
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".
 

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