Dark Energy: homogeneous or scalar? (universe, seen, new, find)

[Brian.Pearson]

Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space.

I had pictured dark energy as not being homogeneous, due possibly because of the "strings" we see between galaxies.

[NightBazaar]

Originally Posted by Brian.Pearson

Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space.

I had pictured dark energy as not being homogeneous, due possibly because of the "strings" we see between galaxies.

By strings, I assume you mean what are called filaments. On a large scale, the filaments look like a thick mass of spider webs. The guesses I've seen explaining the filaments seem to point more to gravitational attraction and clumps of dark matter. Not that there's a direct relationship, but from the WMAP imaging, we can see a mottled appearence. It's not perfectly smooth. I see no reason why dark energy has to be smooth and even. Just a thought, but from our perspective at very large scales perhaps dark energy tends to be constant. At smaller scales though, its energy density might vary making it somewhat clumpy. As indicated, maybe there are two forms of dark energy.

[Brian.Pearson]

As indicated, maybe there are two forms of dark energy.

Yeah, kind of like neutrinos. Who knows, maybe even the dark matter switches back and forth...LOL

[NightBazaar]

Originally Posted by Brian.Pearson

Yeah, kind of like neutrinos. Who knows, maybe even the dark matter switches back and forth...LOL

That got me to thinking about what evidence is there to support that about neurtrinos, so I did a little digging. Enter the "Chameleon Particle". An experiment was done which a muon-type neutrino was caught for the first time in the act of transforming into a tau-type. It can change its appearance (Reminds me of the movie, "The Thing" ). It's pretty deep for me, but apparently it has to do with changing the ways they oscillate. The "chameleon" can change its mass to blend in with its surroundings. Such characteristics might have something to do with Dark Matter, and possibly have something to do with Dark Energy. There doesn't seem to be a lot information about it.

CERN Press Release

Chameleon particle blends into the background - physicsworld.com

First 'chameleon particle' spotted after changing type - physics-math - 01 June 2010 - New Scientist

Dark-energy particle spotted? : Nature News

[Brian.Pearson]

Originally Posted by NightBazaar

That got me to thinking about what evidence is there to support that about neurtrinos, so I did a little digging. Enter the "Chameleon Particle". An experiment was done which a muon-type neutrino was caught for the first time in the act of transforming into a tau-type. It can change its appearance (Reminds me of the movie, "The Thing" ). It's pretty deep for me, but apparently it has to do with changing the ways they oscillate. The "chameleon" can change its mass to blend in with its surroundings. Such characteristics might have something to do with Dark Matter, and possibly have something to do with Dark Energy. There doesn't seem to be a lot information about it.

CERN Press Release

Chameleon particle blends into the background - physicsworld.com

First 'chameleon particle' spotted after changing type - physics-math - 01 June 2010 - New Scientist

Dark-energy particle spotted? : Nature News

I'm still reading your articles, and have one more to go. But in the meantime, I thought I'd post this one. That is the article that made me wonder if they might have caught a neutrino in the middle of flipping.

[Brian.Pearson]

OK. (from the last article) Suppose instead of dark energy causing photons to disappear, maybe it is dark matter?

[NightBazaar]

Originally Posted by Brian.Pearson

OK. (from the last article) Suppose instead of dark energy causing photons to disappear, maybe it is dark matter?

Do you mean maybe dark matter that causes photons to "disappear" (or change)?

BTW, the link in your previous post doesn't work.

[PITTSTON2SARASOTA]

Originally Posted by Brian.Pearson

Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space.

I had pictured dark energy as not being homogeneous, due possibly because of the "strings" we see between galaxies.

http://www.city-data.com/forum/scien...-morphing.html