Is Dark Matter a 'Pressure' caused by something 'outside' of the Universe?

In summary, the conversation discusses the concept of dark energy and its possible origins outside of the universe. There is also mention of dark matter and the need for continued funding for space observation projects to further understand these phenomena. The idea of multiple universes and their potential influence on our own universe is also brought up. There is speculation on whether the rate of expansion of gravity's warping of space is limited by light speed and if this could explain the change in acceleration of the universe's expansion rate.
  • #1
Olias
257
0
I have read that the Dark-Energy may be a consequence of Pressure from outside of the Universe. The presence of a spin zero field (higgs-field) seems to make this idea really interesting.

Negative pressure was postulated by Poincaire, Dirac. Accordingt to the author, negative pressure(Cosmological-Constant) may be attributed to the physical space outside of the Universe?

What you all think?

Edited DarkMatter to Dark-Energy
 
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  • #2
What you are describing is usually called dark energy. The concept of outside the universe is weird to me.

Dark matter (non-baryonic matter) is somewhat more prosaic. It seems necessary to hold galaxies together, but they don't know what it is. There are various types of stuff proposed for it - axions, WIMPS, neutralinos, but none have been detected.
 
  • #3
mathman said:
What you are describing is usually called dark energy. The concept of outside the universe is weird to me.

Dark matter (non-baryonic matter) is somewhat more prosaic. It seems necessary to hold galaxies together, but they don't know what it is. There are various types of stuff proposed for it - axions, WIMPS, neutralinos, but none have been detected.


One way to get an administerative gaze in These PF's. is to throw a few carrots here and there! :biggrin:

An obvious mistake (just jesting I made a mistake in calling it Dark Matter,it is as you rightly state Dark Energy!) and you deserve an explanation from the said paper, so for your attention if you so desire:http://uk.arxiv.org/abs/astro-ph?0404601

thanks for pointing out and responding.
 
  • #4
Let a thousand 'dark energy' theory come forth! Let there be a great and glorious debate! Let us speculate about parallel universes, exotic concepts, and more.

But let's also make sure the funding continues, for the Hubble Space Telescope, WMAP and its successors, SNAP, GLAST, and so on ... without good observations (and lots of them), there will be nothing to test the wild speculation and sober theorising on.

IMHO, assuming the funding does continue, it'll be at least 30 years before a good understanding of the nature of 'dark energy' will be obtained.
 
  • #5
Nereid said:
Let a thousand 'dark energy' theory come forth! Let there be a great and glorious debate! Let us speculate about parallel universes, exotic concepts, and more.

But let's also make sure the funding continues, for the Hubble Space Telescope, WMAP and its successors, SNAP, GLAST, and so on ... without good observations (and lots of them), there will be nothing to test the wild speculation and sober theorising on.

IMHO, assuming the funding does continue, it'll be at least 30 years before a good understanding of the nature of 'dark energy' will be obtained.

I agree on the Hubble/WMAP/SNAP/GLAST..so on.

But I am willing to take bets on the Understanding of Dark Energy being resolved within a decade..any takers? :wink:
 
  • #6
IF and this is a big IF
our univerce is one of many random big bangs in a huge bubble of bangs
could the gravity of other universes outside our bubble of space time reach into ours
to pull our stuff outward, there by powering our current accelleration of the rate of expansion
without the need for new forces

is the rate of expansion of gravity's warping of space limited by lightspeed??

I have no idea how this could be tested

a random thought IF the outside univerces are many times older then ours is
therefor having more time to spread their warping of spacetime into our univerce's space
IF the of the rate of expansion is limited by lightspeed
could that be the cause of the change in the accelleration of the rate of expansion
that some claim happened in the past when our univerce changed from decelleration to acelleration in the expansions rate as the out side force passed thru our space
 

What is dark matter?

Dark matter is a type of matter that does not interact with light or any other form of electromagnetic radiation, making it invisible to telescopes and other instruments that detect light. It is estimated to make up about 27% of the total mass and energy in the universe.

What is the pressure of dark matter and what causes it?

The pressure of dark matter is a topic of ongoing research and debate. Some theories suggest that dark matter may have a type of pressure caused by interactions between its particles. Other theories propose that dark matter may have a repulsive force, similar to the pressure of dark energy, which drives the expansion of the universe.

Is dark matter caused by something outside of the universe?

The origin of dark matter is still unknown, and there is no conclusive evidence to suggest that it is caused by something outside of the universe. However, some theories propose that dark matter may be connected to other dimensions or parallel universes, which could potentially be considered "outside" of our observable universe.

How do scientists study dark matter pressure?

There are a few different methods that scientists use to study the pressure of dark matter. One method is to observe the motions of stars and galaxies in the universe and use mathematical models to infer the presence and pressure of dark matter. Another method is to conduct experiments using particle accelerators to try and detect the properties and interactions of dark matter particles.

Could dark matter pressure have an impact on the universe?

The pressure of dark matter is thought to play a role in the large-scale structure and dynamics of the universe. It is believed to contribute to the formation and evolution of galaxies and galaxy clusters. However, its exact impact on the universe is still not fully understood and is an area of active research in the field of cosmology.

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