Dark matter theories

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Giorgio
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Dark matter theories

Postby Giorgio » Thu Aug 08, 2019 10:19 pm

Dark mater is one of those theories that I never considered as having a solid base, a theory born just on the need to mathematically satisfy an imperfect modeling of the universe due to our still limited understanding of the space time fabric, of the emergence of mass and of what the heck gravity and inertia really are.

But if there is something that we all should agree on is that nature has the tendency of repeating herself with same/similar mathematical constructs for the different fundamental forces. This means that sometimes the answer to a puzzling question lies not in invoking an unknown, invisible, non measurable entity, but simply into better understanding the mathematical construct we are using to analyze it.

Luckily, more researchers are now finally moving out of such mental constrains and starting to look for more simplistic and observable models.

Here is a fresh paper from Nature's "Scientific Reports" that in an elegant way gets rid of the need of dark mater by creating a mathematical model that treats Entropy as a "complement of information" and by doing so, coherently explaining galaxies shapes among other things.

The title is: Maximum Entropy (Most Likely) Double Helical and Double Logarithmic Spiral Trajectories in Space-Time
PDF available HERE or HERE


A worthwhile read for anyone interested in the field.

*Edited to add Paper's original title.
A society of dogmas is a dead society.

paperburn1
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Re: Dark matter theories

Postby paperburn1 » Fri Aug 09, 2019 3:48 pm

With the recent discovery of the probability of many tines more galaxies out there does that not put a kink ito dark matter Hypothesis? :?:
I am not a nuclear physicist, but play one on the internet.

Giorgio
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Re: Dark matter theories

Postby Giorgio » Fri Aug 09, 2019 8:31 pm

paperburn1 wrote:With the recent discovery of the probability of many tines more galaxies out there does that not put a kink ito dark matter Hypothesis? :?:

Personally I would say yes. According what I read they expect to find thousands and thousands more once the survey is complete. That indeed should put a dent into dark matter conjectures and force them to revise their assumptions.

Than again, I see the glass half full, other might see it half empty and conjure that the extra galaxies will fit well into the model where the black hole at the center of each Galaxy act like a nodal point of connection for streams of dark matter that connect each galaxy with the other......

The intrinsic beauty of Dark matter theory is that you can just make up models to adapt them to latest discoveries without bothering about observations because there is nothing to observe..... Kinda like a religious dogma.
A society of dogmas is a dead society.

Aero
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Re: Dark matter theories

Postby Aero » Sat Aug 10, 2019 3:38 pm

Well, my theory about dark matter is that we extrapolate the number of undiscovered galaxies and their black hole masses until all dark matter is absorbed into the black holes. Of course, I suspect that was the first calculation made when scientists noticed the need to add matter to the universe models.
Aero

Giorgio
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Re: Dark matter theories

Postby Giorgio » Sat Aug 10, 2019 6:57 pm

Not only undiscovered galaxies but also all the matter that might exist among galaxies and between solar systems within the same galaxy can have deep influence on those theories. Increasing the mass of galaxies by adding newly discovered baryonic matter will need the revision of the theorized amount of Dark matter, but will also modify the universe density (Rho) in the first Friedmann equation, creating more headache for the Dark energy theorists that are already struggling with the continuous changes in value observed for the first term of the Friedmann equation (which is the Hubble constant).

My hope is that one day we will be able to move observations far in space with better instruments, that might give us really a new understanding of our local area constituency and (maybe) of milky way and the rest of galaxies as a consequence. Unfortunately I don't think that I will have a chance to see that in my life.
A society of dogmas is a dead society.

williatw
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Re: Dark matter theories

Postby williatw » Wed Oct 16, 2019 6:49 pm

Giorgio wrote:Not only undiscovered galaxies but also all the matter that might exist among galaxies and between solar systems within the same galaxy can have deep influence on those theories. Increasing the mass of galaxies by adding newly discovered baryonic matter will need the revision of the theorized amount of Dark matter, but will also modify the universe density (Rho) in the first Friedmann equation, creating more headache for the Dark energy theorists that are already struggling with the continuous changes in value observed for the first term of the Friedmann equation (which is the Hubble constant).

My hope is that one day we will be able to move observations far in space with better instruments, that might give us really a new understanding of our local area constituency and (maybe) of milky way and the rest of galaxies as a consequence. Unfortunately I don't think that I will have a chance to see that in my life.



On an unrelated subject if you can stand the non-sequitur; is there any valid scientific reason to think that if there was a stable isotope of Element 115 it would have any unusual properties? Like "anti-gravity"? I believe that Bob Lazar claims that this element could magnify and extend the strong nuclear force beyond its very limited boundaries; is this total garbage or is there even a small chance of there being anything to it? I would also be interested in your opinion about the Navy's tic-tac ufo footage.

Giorgio
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Re: Dark matter theories

Postby Giorgio » Thu Oct 17, 2019 3:35 pm

williatw wrote:On an unrelated subject if you can stand the non-sequitur; is there any valid scientific reason to think that if there was a stable isotope of Element 115 it would have any unusual properties? Like "anti-gravity"?

None to my knowledge.
Also by logic we can infer that if indeed there was a material who posses repulsive gravity like properties it would probably escape any large body and tend to amass in areas where gravity in is balance, like the Lagrange points. As no masses has been detected in the various Lagrange points in our solar system, we can probably safely state that no such thing as a matter with repulsive gravity characteristics exists.
Yet, we are finally starting to understand what might be the field and the mediating particles that give mass to matter and that could enable us one day to shield a specific amount of matter from the effect of mass. I would love to see that.

williatw wrote: I believe that Bob Lazar claims that this element could magnify and extend the strong nuclear force beyond its very limited boundaries; is this total garbage or is there even a small chance of there being anything to it?

I didn't know who Bob Lazar is, so I googled for it.
Whenever someone makes claims without supplying any theoretical or mathematical support and at the same time is using such claims to push sales of a book or a movie, I tend to place them into the marketing department sector and not into the scientific research one.

williatw wrote:I would also be interested in your opinion about the Navy's tic-tac ufo footage.

My opinion is that I don't get why an alien civilization with interstellar travel abilities would visit our planet in the middle of the ocean with a "human/animal eyes" visible light cloaking device while neglecting IR and radar signatures. They are either the most stupid aliens in the universe or they didn't want to scare the fishes! :mrgreen:
A society of dogmas is a dead society.


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