Does some dark matter carry an electric charge?

May 30, 2018, Harvard-Smithsonian Center for Astrophysics
This artist's impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the cosmic microwave background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Credit: CfA/M. Weiss

Astronomers have proposed a new model for the invisible material that makes up most of the matter in the Universe. They have studied whether a fraction of dark matter particles may have a tiny electrical charge.

"You've heard of electric cars and e-books, but now we are talking about electric dark ," said Julian Munoz of Harvard University in Cambridge, Mass., who led the study that has been published in the journal Nature. "However, this electric charge is on the very smallest of scales."

Munoz and his collaborator, Avi Loeb of the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Mass., explore the possibility that these charged interact with normal matter by the electromagnetic force.

Their new work dovetails with a recently announced result from the Experiment to Detect the Global EoR (Epoch of Reionization) Signature (EDGES) collaboration. In February, scientists from this project said they had detected the radio signature from the first generation of stars, and possible evidence for interaction between dark matter and normal matter. Some astronomers quickly challenged the EDGES claim. Meanwhile, Munoz and Loeb were already looking at the theoretical basis underlying it.

"We're able to tell a fundamental physics story with our research no matter how you interpret the EDGES result," said Loeb, who is the chair of the Harvard astronomy department. "The nature of dark matter is one of the biggest mysteries in science and we need to use any related new data to tackle it."

The story begins with the first stars, which emitted ultraviolet (UV) light. According to the commonly accepted scenario, this UV light interacted with cold hydrogen atoms in gas lying between the stars and enabled them to absorb the cosmic microwave background (CMB) radiation, the leftover radiation from the Big Bang.

This absorption should have led to a drop in intensity of the CMB during this period, which occurs less than 200 million years after the Big Bang. The EDGES team claimed to detect evidence for this absorption of CMB light, though this has yet to be independently verified by other scientists. However, the temperature of the hydrogen gas in the EDGES data is about half of the expected value.

"If EDGES has detected cooler than expected hydrogen gas during this period, what could explain it?" said Munoz. "One possibility is that hydrogen was cooled by the dark matter."

At the time when CMB radiation is being absorbed, the any free electrons or protons associated with would have been moving at their slowest possible speeds (since later on they were heated by X-rays from the first black holes). Scattering of charged particles is most effective at low speeds. Therefore, any interactions between normal matter and dark matter during this time would have been the strongest if some of the dark matter particles are charged. This interaction would cause the to cool because the dark matter is cold, potentially leaving an observational signature like that claimed by the EDGES project.

"We are constraining the possibility that dark matter particles carry a tiny electrical charge – equal to one millionth that of an electron – through measurable signals from the cosmic dawn," said Loeb. "Such tiny charges are impossible to observe even with the largest particle accelerators."

Only small amounts of dark matter with weak electrical charge can both explain the EDGES data and avoid disagreement with other observations. If most of the dark matter is charged, then these particles would have been deflected away from regions close to the disk of our own Galaxy, and prevented from reentering. This conflicts with observations showing that large amounts of dark matter are located close to the disk of the Milky Way.

Scientists know from observations of the CMB that protons and electrons combined in the early Universe to form neutral atoms. Only a small fraction of these charged particles, about one in a few thousand, remained free. Munoz and Loeb are considering the possibility that dark matter may have acted in a similar way. The data from EDGES, and similar experiments, might be the only way to detect the few remaining charged , as most of the dark matter would be neutral.

"The viable parameter space for this scenario is quite constrained, but if confirmed by future observations, of course we would be learning something fundamental about the nature of , one of the biggest puzzles that we have in physics today," said Harvard's Cora Dvorkin who was not involved with the new study.

Lincoln Greenhill also from the CfA is currently testing the observational claim by the EDGES team. He leads the Large Aperture Experiment to Detect the Dark Ages (LEDA) project, which uses the Long Wavelength Array in Owen's Valley California and Socorro, New Mexico.

A paper describing these results appear in the May 31, 2018 issue of the journal Nature.

Explore further: 3 knowns and 3 unknowns about dark matter

More information: Julian B. Muñoz et al. A small amount of mini-charged dark matter could cool the baryons in the early Universe, Nature (2018). DOI: 10.1038/s41586-018-0151-x

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Benni
2.4 / 5 (14) May 30, 2018
"This conflicts with observations showing that large amounts of dark matter are located close to the disk of the Milky Way."

.........maybe in future articles about DM, it would be useful if they would include pictures of these OBSERVATIONS, then maybe we might get a better idea of just what the hell it is they're talking about.
cantdrive85
2.1 / 5 (11) May 30, 2018
Does some dark matter carry an electric charge?

ROTFLMAO!
rossim22
2 / 5 (12) May 30, 2018
This is just more evidence that the "theory" of GR is unfalsifiable.

"Can some dark matter carry an electric charge?"
Sure, why not?

The universe which contains dark matter is not the universe which we all live in. It's a mathematical construct, a computer-simulated world.
Real observations do not agree because cosmology is no longer describing reality.

arcmetal
2.3 / 5 (6) May 30, 2018
This is just more evidence that the "theory" of GR is unfalsifiable.

"Can some dark matter carry an electric charge?"
Sure, why not?

The universe which contains dark matter is not the universe which we all live in. It's a mathematical construct, a computer-simulated world.
Real observations do not agree because cosmology is no longer describing reality.


Dark matter is like Russell's teapot. It is a teapot that is in orbit around the sun between Earth and Mars. Since it is so small, it will take a long time before our telescopes can observe the teapot, but we must keep looking because some are certain that it is there. Sound familiar?
somefingguy
4.3 / 5 (17) May 30, 2018
"This conflicts with observations showing that large amounts of dark matter are located close to the disk of the Milky Way."

.........maybe in future articles about DM, it would be useful if they would include pictures of these OBSERVATIONS, then maybe we might get a better idea of just what the hell it is they're talking about.


Since you're too lazy to actually use your brain to think, I will be lazy as well and just copy and paste my reply to one of your idiotic comments from a few days ago (to which you didn't respond).

... What do you want a picture of exactly? DM, which doesn't interact with light, which is what a picture captures; or do you want a picture of a black hole, which does not let light escape so that once again you necessarily can't get a picture of it.

I am confused as to why you have such a strong opinion on something that you clearly do not understand on its most basic level.
ZoeBell
May 30, 2018
This comment has been removed by a moderator.
Benni
1.6 / 5 (13) May 30, 2018
I am confused as to why you have such a strong opinion on something that you clearly do not understand on its most basic level.
......well, hell's bells little round man, of course you'd be confused when you compare the level education you Cosmologists have to that of mine with 6 years of formal education in Nuclear/Electrical Engineering plus almost 2 years of continuing ed beyond that.......so how do you stack up against that?

I presume you enjoy chasing your tail around in ever dizzying circles just so you can take a small slice time out of an otherwise boring day.

holoman
1.2 / 5 (9) May 30, 2018
I am confused as to why you have such a strong opinion on something that you clearly do not understand on its most basic level.
......well, hell's bells little round man, of course you'd be confused when you compare the level education you Cosmologists have to that of mine with 6 years of formal education in Nuclear/Electrical Engineering plus almost 2 years of continuing ed beyond that.......so how do you stack up against that?

I presume you enjoy chasing your tail around in ever dizzying circles just so you can take a small slice time out of an otherwise boring day.


Good show Benni ! I have similar background, https://thomasins...out.html
Benni
1.8 / 5 (9) May 30, 2018
Good show Benni ! I have similar background, https://thomasins...out.html
......you Mike Thomas?
NoStrings
2.3 / 5 (6) May 30, 2018
There is not a day without a new fantasy on a subject of darK matteR. Now, does it have charge? Does it have chukva? Or frobet? It sure has strange closket!

As I said just yesterday:

Dark matter gives physicist so much to do. Is it light or heavy? Does it interact with matter or itself, or not? Does it exist in all galaxies, and if so, in what distribution. If it does exist in such a distribution, how it happen to form as we imagine it to form? And no one have seen it or measured it, but how many hypotheses it can fuel. Endless. And we crackpots can fantasize too, to our delight.

Honestly, if dark matter didn't exist, physicists would have to invent it.
Benni
1.7 / 5 (6) May 30, 2018
And we crackpots can fantasize too, to our delight.
......Pop-Cosmology.

Thorium Boy
1 / 5 (1) May 31, 2018
I can see it, feel it, touch it, smell it, taste it or detect it. But it's there!!
Gigel
5 / 5 (3) May 31, 2018
vlaaing peerd
4.3 / 5 (12) May 31, 2018
6 years of formal education in Nuclear/Electrical Engineering


And you don't know that you can't take pics of stuff that doesn't interact with light? Must have been quite a study then.
TheGhostofOtto1923
1 / 5 (1) May 31, 2018
There is not a day without a new fantasy on a subject of darK matteR. Now, does it have charge? Does it have chukva? Or frobet? It sure has strange closket!
The important question is whether it has chutzpah or not.
katesisco
1.6 / 5 (7) May 31, 2018
There are over 660 replies to this and I am not the only one annoyed. This silliness of 'dark matter' is a way to wander in the dark while science supposedly advances in understanding how to control and use the electrical-based energy. STOP
jonesdave
4.4 / 5 (7) May 31, 2018
There are over 660 replies to this and I am not the only one annoyed.


Really? Where are these 660 replies, and how many of them are from scientists, rather than unqualified cranks?
Spacebaby2001
5 / 5 (3) May 31, 2018
There are over 660 replies to this and I am not the only one annoyed.


Really? Where are these 660 replies, and how many of them are from scientists, rather than unqualified cranks?


I would guess that they are seeing this article on social media and instead of commenting on the post, with its 600+ comments, made their way to phys.org on accident.

If they don't understand why scientists are looking for DM and the semantics behind its naming and get angry enough to speak out about their anger then this blundering is understandable
jonesdave
4.5 / 5 (8) May 31, 2018
I would guess that they are seeing this article on social media and instead of commenting on the post, with its 600+ comments, made their way to phys.org on accident.


Probably. I can see the headlines now:
"DARK MATTER BANNED AFTER OUTRAGE ON TWITTER."
Benni
1.6 / 5 (7) May 31, 2018
I would guess that they are seeing this article on social media and instead of commenting on the post, with its 600+ comments, made their way to phys.org on accident.


Probably. I can see the headlines now:
"DARK MATTER BANNED AFTER OUTRAGE ON TWITTER."


jonesy, another one of the little round men living here having yet another pop-cosmology fantasy fit.
jonesdave
4.4 / 5 (7) May 31, 2018
I would guess that they are seeing this article on social media and instead of commenting on the post, with its 600+ comments, made their way to phys.org on accident.


Probably. I can see the headlines now:
"DARK MATTER BANNED AFTER OUTRAGE ON TWITTER."


jonesy, another one of the little round men living here having yet another pop-cosmology fantasy fit.


What would you know, woo boy? Science and maths really aren't your forte, are they? As shown.
rossim22
2 / 5 (8) May 31, 2018

... What do you want a picture of exactly? DM, which doesn't interact with light, which is what a picture captures; or do you want a picture of a black hole, which does not let light escape so that once again you necessarily can't get a picture of it.


I can't speak for the guy you were responding to, but your comment is very interesting.

Don't you see that ALL of the evidence attributed to dark matter and black holes, as you point out, is completely indirect? There must be certain assumptions in place for one to interpret the direct observations and infer that black holes and dark matter exist.

And that's ok.. assumptions are used throughout the scientific community.
However, in modern cosmology and astrophysics, we are always needing to add more ad hoc assumptions to keep explaining the universe in terms of GR. It's truly becoming a case of 'epicycles' all over again.
Benni
1.4 / 5 (9) May 31, 2018
or do you want a picture of a black hole, which does not let light escape so that once again you necessarily can't get a picture of it.


Then where is the outline of the supermassive BH disc blocking background light at point Sgr A in the PICTURE at http://ircamera.a...nter.htm the 7th & 8th photo frames from the top of the page?

I can see why pop-cosmology lovers like you do not like pictures, they make clear your fantasies cannot be imaged, and when this is pointed out to you is when the name calling rants become so shrill that you lose all sight of a proven resource in science called OBSERVATIONAL EVIDENCE.
jonesdave
4.4 / 5 (7) May 31, 2018
And that's ok.. assumptions are used throughout the scientific community.
However, in modern cosmology and astrophysics, we are always needing to add more ad hoc assumptions to keep explaining the universe in terms of GR. It's truly becoming a case of 'epicycles' all over again.


And what is your problem with GR? Care to show us where it has failed? Or propose a scientifically sensible alternative? That is the problem with people like you - you like to criticise, based on some crap trotted out by some scientifically illiterate woo merchant, such as Thornhill, yet you have no alternative. And wouldn't even know how to go about coming up with one. In which case your comments are pointless and worthless.

cantdrive85
1.5 / 5 (8) May 31, 2018
Care to show us where it has failed?

You're missing 75% of the matter in the Universe you moron, this would be a red flag in any other branch of science.
Benni
1.5 / 5 (8) May 31, 2018
And what is your problem with GR?


The fantasies of Pop-Cosmology have absolutely nothing to do with Einstein's thesis of General Relativity, if you had to be the one to dig into that thesis you'd be lost before you finished the opening paragraph.

For example here is a link to Einstein's 1939 paper trashing Schwarzschild's black hole math:

Albert Einstein- Oct 1939

"On a Stationary System With Spherical Symmetry Consisting of Many Gravitating Masses"

Author(s): Albert Einstein Reviewed work(s): Source: The Annals of Mathematics, Second Series, Vol. 40, No. 4 (Oct., 1939), pp. 922-936 Published by: Annals of Mathematics Stable URL:.
http://www.cscamm...hild.pdf

Now tell us you want to disparage Einstein who contradicts everything you believe about pop-cosmology?
jonesdave
4.3 / 5 (6) May 31, 2018
Care to show us where it has failed?

You're missing 75% of the matter in the Universe you moron, this would be a red flag in any other branch of science.


And so are you loony tunes. What has that got to do with GR? Spell it out. Scientifically (lol).
jonesdave
4.3 / 5 (6) May 31, 2018
And what is your problem with GR?


The fantasies of Pop-Cosmology have absolutely nothing to do with Einstein's thesis of General Relativity, if you had to be the one to dig into that thesis you'd be lost before you finished the opening paragraph.

For example here is a link to Einstein's 1939 paper trashing Schwarzschild's black hole math:

Albert Einstein- Oct 1939

"On a Stationary System With Spherical Symmetry Consisting of Many Gravitating Masses"

Author(s): Albert Einstein Reviewed work(s): Source: The Annals of Mathematics, Second Series, Vol. 40, No. 4 (Oct., 1939), pp. 922-936 Published by: Annals of Mathematics Stable URL:.



Another idiot who understands neither maths nor science. Einstein didn't do anything to the maths, you moron. He posited a large number of objects to account for where HIS maths inevitably led. He didn't like the idea of HIS maths leading to a singularity. He was wrong.
Merrit
3 / 5 (4) May 31, 2018
@benni thank you for the link. Interesting paper. You have to keep in mind though that his analysis was on cluster objects following circular paths. His conclusion that the singularities can't exist was based on the objects having to go faster than the speed of light near the event horizon. This is true for circular orbits. Which is why you can't have stable orbits that close to the BH.
Benni
1.6 / 5 (7) May 31, 2018
@benni thank you for the link. Interesting paper. You have to keep in mind though that his analysis was on cluster objects following circular paths. His conclusion that the singularities can't exist was based on the objects having to go faster than the speed of light near the event horizon. This is true for circular orbits.
Now why don't you read on to the rest of Einstein's Conclusions section:

"Although the theory given here treats only clusters whose particles move along circular paths it does not seem to be subject to reasonable doubt that most general cases will have analogous results."

The problem with pop-cosmology pseudo-science BH theory is how desperately you guys keep trying to apply Escape Velocity Math to an Electro-magnetic Wave, never figuring out why it can't work in reality, that there is no quantity of gravity that can reduce the frequency of a photon to zero which is what must occur to prevent a photon from escaping a gravitating body.
ZoeBell
Jun 01, 2018
This comment has been removed by a moderator.
jonesdave
3.7 / 5 (3) Jun 01, 2018
It fails to predict gravitational lensing and force behavior of 23% of dark matter and 73% of dark energy - which is quite a lot. Just the fact you don't know about it disqualifies you from any scientific discussion.


Idiot, of course it predicts gravitational lensing!
jonesdave
2.3 / 5 (3) Jun 01, 2018
The problem with pop-cosmology pseudo-science BH theory is how desperately you guys keep trying to apply Escape Velocity Math to an Electro-magnetic Wave, never figuring out why it can't work in reality, that there is no quantity of gravity that can reduce the frequency of a photon to zero which is what must occur to prevent a photon from escaping a gravitating body.


Thick. or what? Stick to mopping floors, Bernie.
Benni
1.8 / 5 (5) Jun 01, 2018
The fantasies of Pop-Cosmology have absolutely nothing to do with Einstein's thesis of General Relativity, if you had to be the one to dig into that thesis you'd be lost before you finished the opening paragraph.

For example here is a link to Einstein's 1939 paper trashing Schwarzschild's black hole math:

Albert Einstein- Oct 1939

"On a Stationary System With Spherical Symmetry Consisting of Many Gravitating Masses"

Author(s): Albert Einstein Reviewed work(s): Source: The Annals of Mathematics, Second Series, Vol. 40, No. 4 (Oct., 1939), pp. 922-936 Published by: Annals of Mathematics Stable URL:.


Another idiot who understands neither maths nor science. Einstein didn't do anything to the maths. He posited a large number of objects to account for where HIS maths inevitably led. He didn't like the idea of HIS maths leading to a singularity. He was wrong.


Now Einstein's the "idiot", at least he knew how to solve Differential Equations, you can't.

jonesdave
5 / 5 (3) Jun 01, 2018
Now Einstein's the "idiot", at least he knew how to solve Differential Equations, you can't.


Says who? You certainly can't mop boy. Can't even do a simple equation to derive the Schwarzschild radius. As shown. Stick to mopping, there's a good chap.
Benni
1.6 / 5 (7) Jun 01, 2018
Now Einstein's the "idiot", at least he knew how to solve Differential Equations, you can't.

Says who? You certainly can't mop boy. Can't even do a simple equation to derive the Schwarzschild radius. As shown. Stick to mopping, there's a good chap.


Everyone of you in the Pop-Cosmology pseudo-science crowd living here all have the same problem, locating your missing gray matter. If you want to locate some missing matter you didn't know existed, look in a full length body mirror & turn sideways.
jonesdave
4.2 / 5 (5) Jun 01, 2018
Now Einstein's the "idiot", at least he knew how to solve Differential Equations, you can't.

Says who? You certainly can't mop boy. Can't even do a simple equation to derive the Schwarzschild radius. As shown. Stick to mopping, there's a good chap.


Everyone of you in the Pop-Cosmology pseudo-science crowd living here all have the same problem, locating your missing gray matter. If you want to locate some missing matter you didn't know existed, look in a full length body mirror & turn sideways.


You are scientifically illiterate. As shown. Ergo, your opinion is worthless. Go away.
Merrit
1 / 5 (1) Jun 01, 2018
@zeobell I agree that there is an issue with our models, otherwise we wouldn't have dark matter and energy. But, it isn't necessarily an issue with GR. GR is really good at making predictions that match reality, better than any other theory. In cosmology, issues pop out when we look at the universe at the galactic scale or larger. The orbital velocities of the Stars are not matching up with our calculated mass of galaxies. People assume this is due to missing mass, but there are actually many different reasons this could occur
Benni
1.7 / 5 (6) Jun 01, 2018
The orbital velocities of the Stars are not matching up with our calculated mass of galaxies.


Orbital velocities of what stars? In what galaxies?

I'll help you, "orbital velocities" of stars within the arms of SPIRAL GALAXIES, but not the orbitals within ELLIPTICAL GALAXIES which gravitationally function in almost perfect accord using the DIRECT calculations of Newtonian Gravity.

SPIRAL GALAXIES make up only 1/3 of the total mass of the universe, ELLIPTICAL GALAXIES comprise the remaining 2/3 of total mass.

To claim 1/3 of the total mass of the universe requires a gravitational mechanism at it's perimeter to hold spiral galaxies together thus keeping them from imploding is ignoring the far bigger picture of the remaining 2/3 of total mass requiring no such mechanism of INFERRED GRAVITY to establish the orbital mechanics of stars bound by gravity within Ellipticals.

RNP
4.4 / 5 (7) Jun 02, 2018
@benni

Orbital velocities of what stars? In what galaxies?

I'll help you, "orbital velocities" of stars within the arms of SPIRAL GALAXIES, but not the orbitals within ELLIPTICAL GALAXIES which gravitationally function in almost perfect accord using the DIRECT calculations of Newtonian Gravity.


This is completely wrong. Although I know you will be unwilling (or unable) to read and understand it, here is a paper discussing DM in elliptical galaxies and proving the point:

https://arxiv.org...104.0012

There are thousands more if you want to actually learn something about this subject.
RNP
4 / 5 (8) Jun 02, 2018
@benni
To claim 1/3 of the total mass of the universe requires a gravitational mechanism at it's perimeter to hold spiral galaxies together thus keeping them from imploding


Yet more fallacies.

The DM *permeates the whole galaxy*. It is just more significant in the outer regions where baryonic matter is relatively sparse. Also the effect of DM is stop stop the galaxy from flying apart, not "imploding".
ZoeBell
Jun 02, 2018
This comment has been removed by a moderator.
ZoeBell
Jun 02, 2018
This comment has been removed by a moderator.
ZoeBell
Jun 02, 2018
This comment has been removed by a moderator.
Benni
1.7 / 5 (6) Jun 02, 2018
To claim 1/3 of the total mass of the universe requires a gravitational mechanism at it's perimeter to hold spiral galaxies together keeping them from imploding


Yet more fallacies.

The DM *permeates the whole galaxy*. It is just more significant in the outer regions where baryonic matter is relatively sparse. Also the effect of DM is stop stop the galaxy from flying apart, not "imploding".


The fallacy is your own & that of anyone else dining within the cauldrons of Pop-Cosmology Fantasyland. Fritz Zwicky in the 1930's s proposed the concept of a counter-gravity halo surrounding all SPIRAL GALAXIES as the preventive means to prevent the spiral arms from imploding into the galactic bulge.

"A dark matter halo is a hypothetical component of a galaxy that envelops the galactic disc and extends well beyond the edge of the visible galaxy. The halo's mass dominates the total mass."

https://en.wikipe...ter_halo

Believe you or Wiki?

RNP
5 / 5 (6) Jun 02, 2018
@benni

The fallacy is your own & that of anyone else dining within the cauldrons of Pop-Cosmology Fantasyland. Fritz Zwicky in the 1930's s proposed the concept of a counter-gravity halo surrounding all SPIRAL GALAXIES as the preventive means to prevent the spiral arms from imploding into the galactic bulge.

"A dark matter halo is a hypothetical component of a galaxy that envelops the galactic disc and extends well beyond the edge of the visible galaxy. The halo's mass dominates the total mass."

Your misunderstanding of this subject is at least in part due to the fact that you have misinterpreted the phase "extends well beyond the edge of the visible galaxy". This does NOT imply that the DM halo exists only beyond the visible galaxy, rather it means that the visible galaxy and DM halo co-exist, but that the DM halo is larger (I.e. it extends beyond).

I will YET AGAIN remind you that Zwicky never worked on spiral galaxies.
Benni
2 / 5 (4) Jun 02, 2018

Orbital velocities of what stars? In what galaxies?

I'll help you, "orbital velocities" of stars within the arms of SPIRAL GALAXIES, but not the orbitals within ELLIPTICAL GALAXIES which gravitationally function in almost perfect accord using the DIRECT calculations of Newtonian Gravity.


This is completely wrong. Although I know you will be unwilling (or unable) to read and understand it, here is a paper discussing DM in elliptical galaxies and proving the point:

https://arxiv.org...104.0012

There are thousands more if you want to actually learn something about this subject.


It's as phony a paper as your experience in Nuclear Physics mister freelance journalist by your own admission.

Why is it that all you freelance journalists can do when coming to a chatroom on science is dredge up slop & swill stuff like this that is completely foreign to the concept of OBSERVATIONAL EVIDENCE? I guess it's easier for you than Differential Equations?
RNP
4.4 / 5 (7) Jun 02, 2018
@benni

Or is it the word "envelop" that is confusing you? Just in case, let me point out that the wiki page is using the word in the same way that you might say "fog envelops a city".
RNP
5 / 5 (6) Jun 02, 2018
@benni

So have you found the solution to the differential equation I keep giving you (and you keep ignoring)?

dN/dt=-N/T

jonesdave
5 / 5 (3) Jun 02, 2018
Why is it that all you freelance journalists can do when coming to a chatroom on science is dredge up slop & swill stuff like this that is completely foreign to the concept of OBSERVATIONAL EVIDENCE? I guess it's easier for you than Differential Equations?


Which are beyond you. As proven. Even a simple calculation to derive the Schwarzschild radius proved too much for you, and elicited a wrong answer. You have nothing to do with nuclear engineering. If you have, then I'm glad I don't live anywhere near the plant.
Benni
1 / 5 (6) Jun 02, 2018
@benni

So have you found the solution to the differential equation I keep giving you (and you keep ignoring)?

dN/dt=-N/T
.........you don't even know what you Copied & Pasted, you read something somewhere about Differential Equations & copied & pasted this, why don't you try comprehending some actual solutions to DEs in some of Einstein's work, for example:

"On a Stationary System With Spherical Symmetry Consisting of Many Gravitating Masses"

Author(s): Albert Einstein Reviewed work(s): Source: The Annals of Mathematics, Second Series, Vol. 40, No. 4 (Oct., 1939), pp. 922-936 Published by: Annals of Mathematics Stable URL:.

http://www.cscamm...hild.pdf

.....try not to get lost out there in the weeds following Einstein's DE solutions.
RNP
4.3 / 5 (6) Jun 02, 2018
@Benni
@benni

So have you found the solution to the differential equation I keep giving you (and you keep ignoring)?

dN/dt=-N/T
.........you don't even know what you Copied & Pasted, you read something somewhere about Differential Equations & copied & pasted this, why don't you try comprehending some actual solutions to DEs in some of Einstein's work,/q]


I did not copy and paste it from anywhere. I simply presented you with the differential equation describing radioactive decay.

I would have thought that someone that claims to be a nuclear engineer would have recognised it! Indeed, it should be recognisable to any high school graduate that took the time to think about it.
jonesdave
5 / 5 (1) Jun 02, 2018
^^^^^^^BRILLIANT. LOL. Benni found out again!
Benni
2 / 5 (4) Jun 02, 2018
I simply presented you with the differential equation describing radioactive decay. I would have thought that someone that claims to be a nuclear engineer would have recognised it! Indeed, it should be recognisable to any high school graduate that took the time to think about it.


.....and it does not apply just specifically to radio-active decay, but how would you know that? Hey, ask jonesy, he too took Differential Equations in high school Algebra class just like you now claim you did, presuming of course that you're even a high school grad.
RealityCheck
1 / 5 (5) Jun 02, 2018
@RNP.
@Benni....here is a paper discussing DM in elliptical galaxies and proving the point:

https://arxiv.org...104.0012
Hi RNP, I trust you and yours been keeping well? Anyhow, to the science...

Your above linked paper, and the (all too many) like it, are all 'publish-or-perish' hack exercises based on obsolete/long falsified simplistic/erroneous assumptions due to old, woefully incomplete observational info; hence the misleading interpretations, expectations and conclusions these exercises start from.

I have already pointed out many on-going ordinary, well-known sources of the Cosmic Microwave Background spectrum observed (ie, no Big-Bang etc needed).

Hack, me-too 'exercises/conclusions' such as those are all based on old/false estimates/problems etc arrived at a time when the science had no clue as to what was REALLY out there, and to what extent!

We now find ORDINARY matter/processes abound!

So BB, Inflation/DE, 'exotic' DM etc claims are 'hack' GIGO. :)
RNP
3.7 / 5 (3) Jun 03, 2018
@Realitycheck
I am limiting myself to one troll-debunk a month, So the debunking (again) of your completely erroneous claims above will have to wait for now.
Benni
2 / 5 (4) Jun 03, 2018
@Realitycheck
I am limiting myself to one troll-debunk a month, So the debunking (again) of your completely erroneous claims above will have to wait for now.


So now you're gonna turn on yourself?
Benni
1.8 / 5 (5) Jun 03, 2018
dN/dt=-N/T
.......by the way, you wrote this wrong, I've explained it to you previously but I guess that high school algebra course in which you & jonesy claim you took differential equations just wasn't quite clear enough explaining why this doesn't work the way you imagine.
RNP
3.7 / 5 (3) Jun 03, 2018
@Benni

dN/dt=-N/T

.......by the way, you wrote this wrong, I've explained it to you previously.....


No I did not, and you have never previously explained it. Simply lying just makes you look even more ignorant.

If you think there is something wrong with my assertion that this is the differential equation describing radioactive decay, then explain how and why, or continue to look like an ignorant troll
RNP
5 / 5 (3) Jun 03, 2018
P.S. @Benni

dN/dt=-N/T

I can teach you how to solve it if you really want to learn something.
Benni
1.8 / 5 (5) Jun 03, 2018
dN/dt=-N/T

I can teach you how to solve it if you really want to learn something.
.....not from what you posted you won't.

First you need to know how to write it, you haven't gotten that far yet in your online internet search to find the specific form DE used to calculate radio-active decay.

This is the problem with you Pop-Cosmology guys living in the land of fantasy, you look up stuff on the internet, then misapply it all the while trying to imagine how brilliantly you claimed to have learned this stuff in your high school algebra class.
RNP
5 / 5 (3) Jun 03, 2018
@Benni
OK. Choose willful ignorance. Your loss, not mine.
Benni
2 / 5 (4) Jun 03, 2018
@Benni
OK. Choose willful ignorance. Your loss, not mine.


The "willful ignorance" calculating radio-active decay is yours, not mine, I already know how to do it, you don't mister freelance journalist living in the fantasyland of Pop-Cosmology.
dicksilk
1 / 5 (3) Jun 03, 2018
"Dark Matter" is simply a variable / phrase used to describe the spacetime medium stirred up by the white matter of a galactic neighborhood, like the water in a snow globe.
facebook.com/groups/Author1/permalink/1952165911461895
ZoeBell
Jun 03, 2018
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ZoeBell
Jun 03, 2018
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ZoeBell
Jun 03, 2018
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