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Science Section => Science General Discussion => Physics & Cosmology => Topic started by: Solitary on July 17, 2014, 12:56:02 PM

Title: What Is Dark Matter?
Post by: Solitary on July 17, 2014, 12:56:02 PM

http://www.sciencedaily.com/releases/2014/07/140702092358.htm

Quote
Reinterpreting dark matter: Could dark matter be regarded as a very cold quantum fluid?

Date:
July 2, 2014
Source:

University of the Basque Country

Summary:
Astronomers have explored cold dark matter in depth and proposes new answers about the formation of galaxies and the structure of the Universe. These predictions are being contrasted with fresh data provided by the Hubble space telescope. It is estimated that only a minute fraction of the matter in the Universe is baryonic matter, which forms stars, planets and living organisms. The rest, comprising over 80%, is dark matter and energy.
Solitary
Title: Re: What Is Dark Matter?
Post by: AllPurposeAtheist on July 17, 2014, 01:18:55 PM
Well... Dark matters because without it light bulb sales would plummet! :eek:
Title: Re: What Is Dark Matter?
Post by: Solitary on July 17, 2014, 01:27:23 PM
But then you could put your stock into candles if it didn't matter.  :winkle:
Title: Re: What Is Dark Matter?
Post by: AllPurposeAtheist on July 17, 2014, 01:31:58 PM
But then you could put your stock into candles if it didn't matter.  :winkle:
Without dark candle sales would also plummet. You need to start a Change.org™ petition to save the dark.
Title: Re: What Is Dark Matter?
Post by: GrinningYMIR on July 17, 2014, 01:45:12 PM
Dark matter, a name given by scientists to give voice to a thing that is beyond their comprehension. In the end, what they chose to call it, is irrelevant, it simply, is.
Title: Re: What Is Dark Matter?
Post by: Solitary on July 17, 2014, 01:47:49 PM
Just like the Universe!  :eek: :pidu: Solitary
Title: Re: What Is Dark Matter?
Post by: Hydra009 on July 17, 2014, 01:54:44 PM
Quote
As the Ikerbasque researcher explained, "guided by the initial simulations of the formation of galaxies in this context, we have reinterpreted cold dark matter as a Bose-Einstein condensate." So, "the ultra-light bosons forming the condensate share the same quantum wave function, so disturbance patterns are formed on astronomic scales in the form of large-scale waves."
Sounds interesting, I'd have to read up on this.  IIRC, they previous postulated that it was made up of weakly interacting massive particles (WIMPs).
Title: Re: What Is Dark Matter?
Post by: Hakurei Reimu on July 17, 2014, 05:23:10 PM
At this point, Dark Matter is probably not just one thing.
Title: Re: What Is Dark Matter?
Post by: AllPurposeAtheist on July 17, 2014, 06:51:32 PM
It's little particles of GAWD and can see you nekid even in the dark!  Now stop touching yourself down 'there' right this moment!
Title: Re: What Is Dark Matter?
Post by: stromboli on July 17, 2014, 07:07:07 PM
Dark matter is invisible
can't be seen thats no bull
In outer space so its pretty cold
from the big bang so its really old

You wonder where that space all went
Dark matter! Like 80%!
So everything else is really scattered
stuck on this big wall of dark matter

I'd be surprised, wouldn't you?
if it turned out to be super glue.
But don't think too much, you'll be mad hatter
tryin' to figure out that shit, dark matter!  :biggrin:
Title: Re: What Is Dark Matter?
Post by: Unbeliever on July 17, 2014, 07:59:15 PM
Well... Dark matters because without it light bulb sales would plummet! :eek:

The dark matter might simply be the lightest superpartner (sparticle): because it's lightness means it cannot decay into anything else. Apparently there would be a lot of them.
Title: Re: What Is Dark Matter?
Post by: AllPurposeAtheist on July 17, 2014, 08:16:16 PM
So basically dark matter is the same as asking if a bear shits in the woods and there's nobody there to see it does that tree next to the bear make a sound?
Title: Re: What Is Dark Matter?
Post by: Unbeliever on July 17, 2014, 08:21:32 PM
More like, does the bear have gravity?
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on July 18, 2014, 09:48:35 AM
Dark matter is invisible
can't be seen thats no bull
In outer space so its pretty cold
from the big bang so its really old

You wonder where that space all went
Dark matter! Like 80%!
So everything else is really scattered
stuck on this big wall of dark matter

I'd be surprised, wouldn't you?
if it turned out to be super glue.
But don't think too much, you'll be mad hatter
tryin' to figure out that shit, dark matter!  :biggrin:


Dark Matter is "dark" because it doesn't interact with the electromagnetic force - no photons, no light.

It's hypothesized because every galaxy is missing the needed mass to justify the rotation of the stars contained within it.

The real mystery is: how does every galaxy, of different sizes and masses, gets its needed Dark Matter when it forms? Where does it get from? (Hint: Goddidit)

We need another Laplace to resolve this issue and take God out of the equation.(Hint: Of course, I'm referring to what Laplace told Napoleon in regard to what Newton believe in order to keep the solar system stable).

 :madu:
Title: Re: What Is Dark Matter?
Post by: Unbeliever on July 18, 2014, 07:34:57 PM
The real mystery is: how does every galaxy, of different sizes and masses, gets its needed Dark Matter when it forms? Where does it get from? (Hint: Goddidit)
 :madu:

I guess the dark matter clumps first, and then attracts the light matter. It's not really a chicken and egg thing. Or maybe it is: the egg came long before the chicken, as the DM came well before the LM.

Title: Re: What Is Dark Matter?
Post by: stromboli on July 18, 2014, 07:37:54 PM
Well, forget superglue. sounds more like stucco.  :think:
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on July 19, 2014, 03:35:59 PM
I guess the dark matter clumps first, and then attracts the light matter. It's not really a chicken and egg thing. Or maybe it is: the egg came long before the chicken, as the DM came well before the LM.



When something happens in a regular fashion like in this case, the ratio of dark matter to baryonic matter is constant throughout the billions of galaxies, it is not an accident and is in need of an explanation.
Title: Re: What Is Dark Matter?
Post by: Solitary on July 24, 2014, 11:24:01 AM
God did it?  :biggrin2: Solitary
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on July 24, 2014, 11:50:58 AM
God did it?  Solitary

They used to say that about lightning, gravity or why milk is white? :biggrin2:
Title: Re: What Is Dark Matter?
Post by: Atheon on July 25, 2014, 01:29:40 AM
Cosmic smog
Title: Re: What Is Dark Matter?
Post by: stromboli on July 25, 2014, 12:38:16 PM
Black stucco until I hear otherwise.  :naughty:
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on July 25, 2014, 04:34:00 PM
Black stucco until I hear otherwise.  :naughty:

(http://i243.photobucket.com/albums/ff277/josephpalazzo/darkmatter.jpg) (http://s243.photobucket.com/user/josephpalazzo/media/darkmatter.jpg.html)
Title: Re: What Is Dark Matter?
Post by: Shol'va on July 28, 2014, 04:19:43 PM
Has anyone consulted with Deepak Chopra on this?
Title: Re: What Is Dark Matter?
Post by: ApostateLois on September 09, 2014, 04:00:18 PM
Until they actually observe and capture some of this alleged "dark matter," I will regard it with the same skepticism that I do God. In fact, it's exactly like God: invisible, undetectable, can't see it or touch it or interact with it, yet people insist that it HAS to be out there somewhere because of all the things that happen that they don't understand. There are currently 118 elements in the Period Table. Which of them is supposed to comprise "dark matter?" Scientists should consider that they might be misinterpreting the data. At one time, we thought there were canals on Mars, and they turned out to be an illusion.
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on September 10, 2014, 12:49:17 PM
Until they actually observe and capture some of this alleged "dark matter," I will regard it with the same skepticism that I do God. In fact, it's exactly like God: invisible, undetectable, can't see it or touch it or interact with it, yet people insist that it HAS to be out there somewhere because of all the things that happen that they don't understand. There are currently 118 elements in the Period Table. Which of them is supposed to comprise "dark matter?" Scientists should consider that they might be misinterpreting the data. At one time, we thought there were canals on Mars, and they turned out to be an illusion.

Dark Matter is postulated on the fact that galaxies - and there are billions of billions of billions of them. - all have missing masses to justify their structure. It's "Dark" because it doesn't interact with matter through the electromagnetic force, only gravitational force. So you won't find it on the Periodic table. This is how science works: there is a fact in need of explanation, that requires a theory. Comparing that to religion is quite an insult.
Title: Re: What Is Dark Matter?
Post by: williemack on September 17, 2014, 11:40:49 PM
Dark Matter is postulated on the fact that galaxies - and there are billions of billions of billions of them. - all have missing masses to justify their structure. It's "Dark" because it doesn't interact with matter through the electromagnetic force, only gravitational force. So you won't find it on the Periodic table. This is how science works: there is a fact in need of explanation, that requires a theory. Comparing that to religion is quite an insult.

Well said.  I will add that, in my understanding, we can calculate a gravitational force that we know exists.  We just don't know what is causing it.  This "something" is hereby dubbed "dark matter".
Title: Re: What Is Dark Matter?
Post by: Solitary on September 18, 2014, 12:11:17 AM
Gravity according to Einstein is caused by a curve in space time. Rap your head around that! Or in Quantum mechanics, particles called gravitons that create a gravitational field. Where's Joseph when we need him?  :eyes:
Title: Re: What Is Dark Matter?
Post by: PickelledEggs on September 18, 2014, 01:25:05 AM
So basically dark matter is the same as asking if a bear shits in the woods and there's nobody there to see it does that tree next to the bear make a sound?
Not sure... But the shit makes a smell!

Sent from your mom

Title: Re: What Is Dark Matter?
Post by: PickelledEggs on September 18, 2014, 01:26:28 AM
Has anyone consulted with Deepak Chopra on this?

If the did, I'm sure he commented about the need for us to feel one-ness with it....

Sent from your mom

Title: Re: What Is Dark Matter?
Post by: josephpalazzo on September 18, 2014, 08:40:39 AM
Gravity according to Einstein is caused by a curve in space time. Rap your head around that! Or in Quantum mechanics, particles called gravitons that create a gravitational field. Where's Joseph when we need him?  :eyes:
I'm here. GR and QM are not needed to postulate Dark Matter. Just Plain old Newtonian physics.
Title: Re: What Is Dark Matter?
Post by: Jason78 on September 18, 2014, 01:34:41 PM
I wonder if dark matter interacts with itself like regular matter does.  I can't imagine that it would interact solely gravitationally otherwise wouldn't it just kind of clump together (or be extremely diffuse, one or the other.) ?
Title: Re: What Is Dark Matter?
Post by: josephpalazzo on September 18, 2014, 04:13:27 PM
I wonder if dark matter interacts with itself like regular matter does.  I can't imagine that it would interact solely gravitationally otherwise wouldn't it just kind of clump together (or be extremely diffuse, one or the other.) ?

We really don't know how this "stuff" works. There have been proposal such as MACHO's, WIMP's, in the past, or in the context of Beyond Standard Model, such particles as neutralinos, axions, photinos as possible candidate for DM. Unless new major discoveries, our understanding of DM will remain quite limited.