Can dark matter form planets and dark matter life?

In summary: It appears that dark matter does not interact through any of the 4 fundamental forces except for gravity. What happens is that dark matter falls in towards high mass areas and simply passes through all normal matter AND itself before slowing under gravity and falling in again. Without a way to lose the kinetic energy it gains from the fall it simply repeats this falling in process over and over again.
  • #1
silvercats
60
0
Can dark matter form planets and dark matter life?
 
Astronomy news on Phys.org
  • #2
Probably not. It appears that dark matter does not interact through any of the 4 fundamental forces except for gravity. What happens is that dark matter falls in towards high mass areas and simply passes through all normal matter AND itself before slowing under gravity and falling in again. Without a way to lose the kinetic energy it gains from the fall it simply repeats this falling in process over and over again.
 
  • #3
Drakkith said:
Probably not. It appears that dark matter does not interact through any of the 4 fundamental forces except for gravity. What happens is that dark matter falls in towards high mass areas and simply passes through all normal matter AND itself before slowing under gravity and falling in again. Without a way to lose the kinetic energy it gains from the fall it simply repeats this falling in process over and over again.

Drakkith, I have been reading this post to try to visualize the dynamic process you’ve described. Would the dark matter constituting the “halo” surrounding a spiral galaxy actually be falling towards the high mass area (galaxy center), pass through and then come to a stop on the far side, only to return again to the other side? Continual motion of all this dark matter presumably would drag inertial space (Lense-Thirring) along with it. Is there some evidence for this motion?

Cheers,
Bobbywhy
 
  • #4
Bobbywhy said:
Would the dark matter constituting the “halo” surrounding a spiral galaxy actually be falling towards the high mass area (galaxy center), pass through and then come to a stop on the far side, only to return again to the other side?
Cheers,
Bobbywhy


Any local concentration of dark matter and matter may result in such movement similar to simple harmonic motion. But dark matter must be everywhere around center of galaxy, and dark matter is estimated to significantly more than matter, such motion may not take place. If it does happen, at the time when all dark matter is crossing over the central region, the total gravitational force from central region will spike up and attract other matter to collapse in center.
 
  • #5
Drakkith said:
Probably not. It appears that dark matter does not interact through any of the 4 fundamental forces except for gravity. What happens is that dark matter falls in towards high mass areas and simply passes through all normal matter AND itself before slowing under gravity and falling in again. Without a way to lose the kinetic energy it gains from the fall it simply repeats this falling in process over and over again.

Can dark matter pass through a black hole as well? Or is it trapped inside even horizon?
 
  • #6
Bobbywhy said:
Drakkith, I have been reading this post to try to visualize the dynamic process you’ve described. Would the dark matter constituting the “halo” surrounding a spiral galaxy actually be falling towards the high mass area (galaxy center), pass through and then come to a stop on the far side, only to return again to the other side? Continual motion of all this dark matter presumably would drag inertial space (Lense-Thirring) along with it. Is there some evidence for this motion?

Cheers,
Bobbywhy

My understanding is that this is what basically happens. I don't know any details at all though.

manojr said:
Can dark matter pass through a black hole as well? Or is it trapped inside even horizon?

I believe it would be trapped inside. But remember that the central supermassive black hole in our galaxy is VERY VERY small compared to the size of the galaxy. Dark matter could easily fall in a great many times and never pass through it.
 
  • #7
There is speculation that certain constraints (adiabatic contraction) on primordial black holes as dark matter candidates from star formation. Considering, "If" the DM consists partly of primordial black holes (PBHs), they will be trapped together with the rest of the DM and will be finally inherited by a star compact remnant(neutron or a white dwarf).

According to what I've read. Assuming it did happen. Dark matter heating alone is incapable of rendering a planet habitable in the vicinity of the solar system, low-emissivity super-Earths in the neighborhoods of the centers of dwarf galaxies and the Milky Way may be able to sustain liquid water thanks to this mechanism. This result should be approached with caution as it is strongly dependent on the precise nature of as-yet-undetected dark matter. We "might envision" cloud-shrouded worlds wandering interstellar space with life thriving on dark matter annihilation. Even if incapable of rendering planets habitable on its own, dark matter heating 'might' abet volcanism and plate tectonics, helping create an environment more conducive to the emergence of life as we know it. I'm not sure of it goes beyond that but it's plausible. At least in theory.

http://prd.aps.org/abstract/PRD/v87/i2/e023507
http://map.gsfc.nasa.gov/universe/uni_matter.html
 
  • #8
manojr said:
Can dark matter pass through a black hole as well? Or is it trapped inside even horizon?

Light is not absorbed or emitted by dark matter (observational). However, Dark matter is affected/interacting by/with gravity. We can assume that dark matter in baryonic matter form ('undetectable by its emitted radiation, but whose presence can be inferred from gravitational effects on visible matter') do fall into a black hole but uncertain (trapped or whatever it leads).
 
  • #9
no no. Is it possible there are matter like dark matter things? Dark matter planets ,people etc... separately. Maybe they also detected our matter(dark matter to them) weakly interacting with their dark matter(matter to them). :D ?possible? yes another world
 
  • #10
I am not expert in this but if we assume that DM is made of some kind of particles that do not interact with EM weak or strong forces the only possibility for them to make complex systems like some strange lifeforms and thing like that is to interact through some unknown fundamental force which does not affect our "known"(from SM of particle physics) particles.
No one has observed other kinds of fundamental interactions between particles. In fact if the interactions does not affect our known particles then there might be no way to prove or know that they exist.

If we assume that the 4 fundamental forces are the only that can exist in the universe then there is no way for dark matter to form complex emergent systems.
The only way for this to happen is if there are some very strange laws of physics that we don't know and they don't affect our ordinary "matter".

Nobody can give answer for this questions since we don't even know what DM is in the first place.
 
  • #11


silvercats said:
no no. Is it possible there are matter like dark matter things? Dark matter planets ,people etc... separately. Maybe they also detected our matter(dark matter to them) weakly interacting with their dark matter(matter to them). :D ?possible? yes another world
Paraphrasing Drakkith's first post:

Not in our current understanding. Dark matter only appears to interact through gravity. Everything 'interesting' that normal matter does, like forming atoms and molecules and complex structures like stars, planets and life, needs strong, weak, and electromagnetic interactions, which dark matter does not do.

We cannot, strictly speaking, rule out the possibility of complex dark matter structures because we know very little about it. But there is no evidence and no theory to suggest that it's possible. That's as close to an outright 'no' as scientists will get.
 
  • #12
Dark matter is not an important food source for black holes. See http://curious.astro.cornell.edu/question.php?number=358 [Broken] for discussion.
 
Last edited by a moderator:
  • #13
Chronos said:
Dark matter is not an important food source for black holes. See http://curious.astro.cornell.edu/question.php?number=358 [Broken] for discussion.

According to this discussion, matter falls in central region because of loss of angular momentum after interaction among the particles, but dark matter does not interact so there is no loss of angular momentum.
Angular momentum is result of particles interacting with each other (Bouncing particles cancel off the momentum except in direction of angular movement). Therefore, dark matter must not have angular momentum in first place. The reason dark matter does not fall in because it is everywhere (equally distributed within galaxy) and it does not interact with itself.
 
Last edited by a moderator:
  • #14
manojr said:
According to this discussion, matter falls in central region because of loss of angular momentum after interaction among the particles, but dark matter does not interact so there is no loss of angular momentum.
Angular momentum is result of particles interacting with each other (Bouncing particles cancel off the momentum except in direction of angular movement). Therefore, dark matter must not have angular momentum in first place. The reason dark matter does not fall in because it is everywhere (equally distributed within galaxy) and it does not interact with itself.

Angular momentum is not the result of particles interacting with each other. Consider that fundamental particles already have intrinsic angular momentum in their spin. And I don't think dark matter is equally distributed everywhere. To my knowledge most of it exists as a spherical "halo" surrounding our galaxy, with a smaller amount falling inward towards the center before passing through the galaxy and gradually slowing once it is back in the halo region.
 

1. Can dark matter form planets?

Currently, there is no evidence to suggest that dark matter can form planets. Dark matter is a hypothetical form of matter that has not been directly observed, and its properties and behavior are still not fully understood. Furthermore, dark matter is thought to interact very weakly with regular matter, making it unlikely that it could clump together to form planets.

2. Can dark matter life exist?

The existence of dark matter life is purely speculative at this point. Since dark matter is thought to interact very weakly with regular matter, it is unlikely that it could interact with biological systems in a way that would allow for the development of life. Additionally, the conditions required for life to evolve are still not fully understood, making it difficult to determine if dark matter could support life.

3. How would dark matter life be different from regular life?

Since the properties and behavior of dark matter are still not fully understood, it is difficult to speculate on how dark matter life would differ from regular life. However, it is possible that dark matter life forms could have different biochemistry and physical characteristics due to their interactions with dark matter particles.

4. Could dark matter life exist in our universe?

Again, there is currently no evidence to suggest that dark matter life exists in our universe. However, given the vastness of the universe and the unknown properties of dark matter, it is possible that life could exist in forms that we cannot yet comprehend.

5. How could we detect or study dark matter life?

Since dark matter is invisible and does not interact with regular matter, it is currently not possible to detect or study dark matter life. However, advancements in technology and our understanding of dark matter may one day allow us to detect and study potential dark matter life forms.

Similar threads

  • Astronomy and Astrophysics
Replies
5
Views
773
  • Astronomy and Astrophysics
Replies
9
Views
768
  • Astronomy and Astrophysics
Replies
11
Views
670
  • Astronomy and Astrophysics
Replies
23
Views
2K
  • Astronomy and Astrophysics
2
Replies
40
Views
3K
  • Astronomy and Astrophysics
Replies
32
Views
2K
Replies
1
Views
1K
  • Astronomy and Astrophysics
Replies
1
Views
837
  • Astronomy and Astrophysics
Replies
4
Views
2K
  • Astronomy and Astrophysics
Replies
2
Views
1K
Back
Top