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Author Topic: No Need for Dark Energy or cosmological constant  (Read 6341 times)

Offline JusSumScienceGi

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No Need for Dark Energy or cosmological constant
« on: 26/01/2006 23:23:29 »
I have been working on a rough theory and thought I would throw it out there for all you thinkers to ponder on.

The standard view of the universe and the "creation event" or "big bang"  
is that all matter in the universe was contained within the singularity.

The singularity spontaneously ruptures and energy is pushed into space first by quantum pressures, later via heat dissipation and inertia.

This model seem to hold true except for recent observation evidence of the universes acceleration has shown that the force of gravity is being overcome by some sort of 'other' force. The two most popular explanations dark energy (mysterious force that accelerates matter rather than attracting it) and the old famous cosmological constant (space itself having a slight charge and some sort of quantum pressure) fail to make much sense when viewed on a larger scale.

I have another theory, and one I think makes a lot more sense.

First we have to assume that the observable universe itself, while the totality of the volume of matter and energy we know of, itself is not the whole of space.

If that is the case, we can then allow for a pre big-bang universe with a large singularity in an area with little to, presumably, no radiation to speak of at all.

Assuming that standard models of black holes still apply in such a super massive scale, and assuming that hawking radiation occurs, we have a picture of a super massive black hole radiating its energy slowly into space for an undefined amount of time.  Given enough time the volume of the singularity itself may have been reduced enough to allow for the evaporation of the event horizon and the release of mater and energy.

The mater released in the 'big bang' however could be a small fraction of the total energy of the original singularity.

This would lead to a 'sea' of ultra energized particles in deep - deep space completely undetectable to anything inside the creation event matter sphere.

These particles will however still effect gravitational effects on the matter released upon the evaporation of the event horizon of the singularity.  This force would appear to cause an acceleration of the matter in the known universe into deep space in a relatively even manner.

No need for exotic repulsive matter.  Plain simple old gravity does the trick.
« Last Edit: 27/03/2006 00:25:53 by daveshorts »


 

Offline Soul Surfer

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Re: No Need for Dark Energy or cosmological constant
« Reply #1 on: 26/01/2006 23:49:34 »
The big problem in your idea is that the net gravitational force anywhere inside a uniform spherical shell of dense material is zero.  It is a rather counterintuitive result but can easily be confirmed using a bit of calculus.  This is one of the important results of an inverse square law that simplifies things and enables cosmological analysis to be done

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Offline JusSumScienceGi

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Re: No Need for Dark Energy or cosmological constant
« Reply #2 on: 26/01/2006 23:59:38 »
The radiation is not even; it's simply going to be near even given the amount of time it was dispersed over.

If you are talking about doubt the singularity is a standard black hole type, I agree, it does not fit the current model. Hence the post.
 

Offline Soul Surfer

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Re: No Need for Dark Energy or cosmological constant
« Reply #3 on: 27/01/2006 11:24:28 »
You have missed the point. If there was a large remote distribution of mass out there all round us it wouldn't have an attraction away from the centre and cause expansion to accelerate  It would have absolutely no effect at all! Unless it was unevenly distributed.  In which gase it would cause a net streaming of matter in the universe in one (or more) directions.  Now a great deal of work has been done in galaxy distributions and velocities to try to find efects like this and although large scale local effects can be seen there is absolitely no indivcation that anything outside our observable horizon is affecting it.  Note any effect like this would also show in the cosmic microwave background radiation.

One other point that you have missed is that a "singularity" is not large it is an almost infinitessimaly small point much smaller than the nucleus of an atom is today!

Learn, create, test and tell
evolution rules in all things
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« Last Edit: 27/01/2006 11:28:09 by Soul Surfer »
 

sharkeyandgeorge

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Re: No Need for Dark Energy or cosmological constant
« Reply #4 on: 27/01/2006 11:51:17 »
sorry if im dense but why wouldnt the mass have any gravitational effect?

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Offline Soul Surfer

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Re: No Need for Dark Energy or cosmological constant
« Reply #5 on: 27/01/2006 13:41:46 »
Because inside a uniform massive spherical shell the gravitational force from all the other mass in different directions exactly cancels out the force from the bit of the inside of the shell that you happen to be closest to.

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« Last Edit: 27/01/2006 13:43:38 by Soul Surfer »
 

sharkeyandgeorge

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Re: No Need for Dark Energy or cosmological constant
« Reply #6 on: 27/01/2006 14:17:03 »
but the universe is kinda disk shaped right so does the mass have gravitational effect if its donut rather than a spherical shell?

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Offline Soul Surfer

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Re: No Need for Dark Energy or cosmological constant
« Reply #7 on: 27/01/2006 22:23:08 »
Where did you get the idea that our universe is disc shaped?  Our galaxy is disc shaped but our universe contains many more galaxies than there are stars in our own galaxy and is spherical.

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Offline tony6789

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Re: No Need for Dark Energy or cosmological constant
« Reply #8 on: 30/01/2006 14:20:37 »
Hey it's all guess work
 

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Re: No Need for Dark Energy or cosmological constant
« Reply #8 on: 30/01/2006 14:20:37 »

 

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