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Speed Found to be Key to Galaxy Formation
QuantumCrypto writes "The All-wavelength Extended Groth strip International Survey (AEGIS), a collaborative effort involving nearly 100 scientists in half a dozen countries, revealed a new principle in the formation of all galaxies, from disk-like spirals, cloud-like ellipticals, and just irregulars. In essence the morphology of the galaxies depends on total mass involved and the internal speed it generates. 'By defining a new speed indicator, their analysis has managed to make sense out of very chaotic-looking objects,' said Sandra Faber, professor of astronomy and astrophysics at the University of California, Santa Cruz."
AEGIS also reported that having their system in a particular galaxy offered +! radius detection of submerged galaxies.
/ok that was horrible
//back to work
In essence the morphology of the galaxies depends on total mass involved and the internal speed it generates.
Yeah, well, it all results in the eventual heat death of the universe, so what's the point really?
The theory of relativity doesn't work right in Arkansas.
A lot of cosmology seems like common sense. All that "Hawking stuff" I found interesting that the first time I read about it was like a big Ok..and.. I could have told you that (except the black hole radiation part.. that's pretty good stuff). I could have told someone this while bs'ing over a beer in a bar while just joking around on crazy topics. More density = More gravity = More pull = Faster spin = Faster sorting = Faster final formation. Ok so you've got me on making the equation part, that's what undergrads are for.. wait a second I'd be and undergrad had I taken that field of study...
that's why the cheat to build constructions fast was called aegis?
So if speed is the key to the formation of galaxies, where does weed fit in? Is it the key to the meaning of life? Maybe drugs are the keys to vast questions involving the universe, life, and everything else.
The hole formed in coffee when rapidly stirred... mmmmm, coffee.....
It would be interesting to see some simulations and animations of rotating spiral galaxies. We could never see that with actual galaxies because they move too slow from our perspective. A simulation will both test to see how accurate their models fit the real thing, and allow us to study how rotation works and spiral arms keep from winding "tighter", as it would otherwise seam. Maybe they could hilight a few reference stars so we can see how they move relative to the spiral arms. As an amature space artist, the movement of the arms relative to stars is a curious wonder that I cannot really visualize yet.
Table-ized A.I.
I'm hereby announcing the creation of DISTASTEFUL. The organisation against the proDIgal, unnecesSarily conTrived and unnaturAlly nonsenSical abbreviaTion of projEcts and Federally fUnded estabLishments.
I found this part really interesting. I know it is something pointed to already by fluctuations in the Cosmic Background Radiation, but the though that local variations at the smallest scales determined the structure of galaxies is really something to think on.
I've got a bad attitude and karma to burn. Go ahead. Mod me down.
For those interested in more details, it looks like the preprint is available at http://arxiv.org/abs/astro-ph/0702643.
Originally TF was just a relationship between rotational speed and luminosity. Since luminosity is some measurement of stellar mass, it was proposed a few years ago that the true physical relationship was not with luminosity but with the total cooled baryonic mass (most of which is in the form of stars in most galaxies). So the Baryonic Tully Fisher relation was proposed, where they substituted the total mass of stars and gas instead of the luminosity. The relationship was tighter, indicating that this is closer to the fundamental relationship.
This work now takes it one more step and uses a more physical measurement for the other variable. Rotational speed of a disk galaxy tells you how deep the potential well is, assuming that all of the motion is in the form of rotation. But if there are also disordered motions, then it's really a combination of the disordered and ordered motion that tell you how deep the potential is. So they've replaced the rotation velocity with a combination of rotational velocity and velocity dispersion - and voila, the relationship is even tighter!
Very nice work.
[TMB]
' By defining a new speed indicator, their analysis has managed to make sense out of very chaotic-looking objects,'
Yes, but will this fancy-pants speed formula help me make sense of my very chaotic-looking tax receipts pile?
"Speed" like the last one here.
I bet that's the cause for a lot of things! /p?
Irregular galaxies are 80% off in our clearance section.
I am to understand that our Galaxy rotates on its axis once ever 250 million years or so. If that is right, and the universe is 13 or 14 billion years old, then it would seem that we get this: age of Universe = 13,000,000,000 Years for one rotation of galaxy = 250,000,000 Total Rotations = age / rotation 52 Total Rotations since Universe began? First, is that about right? Second, if that is right then my question is how do galaxies obtain their distinctive shapes after such few rotations? I ask because the ratio of turns to shapes (especially in the case of bar galaxies, and other sharply defined shapes) seems counter intuitive to me.
Bah!
These results are just a blip on the radar.
I always knew that we were just figment of the imagination of some dude on drugs...
Comment removed based on user account deletion
This is amazing I tell you, truly amazing.
Scientist have developed a theory of the big bang, speed, galaxy formation, age of the universe all with out a theory of time, is time continuous or digital, or energy, 85 % of the energy according to the latest theories if fully unexplained.
The whole issue reminds one of the situation with Newton physics before Einstein.
The only thing that really bothers me about this is obviously this is the source of Global Warming, all the hot air and gases being generated by bull shit.
IANA Astronomer but would like to know if this chain of logic is possible, given the theory that galaxies that are brighter spin faster.
Measure spin (average speed of local streaming)
Get confirmation of our galactic shape (should be barred spiral) from that
Get brightness based on spin
Calculate total galactic output based on that
Calculate brightness map of Milky Way seen from Earth
Estimate how much matter is obscuring our view (make a dust map)
And finally if it is possible to estimate average output for specific frequencies, to use that as a floor in optical wavelength SETI search.
Well, I guess that rules out smack, blow, dope, greenies, and roofies as keys to galaxy formation.
Once explaining a theory similar to this long ago I think it was 5 or 6 years ago back in community college. Professor wanted me to write a paper on it which I did some of the research for. But, decided I was a business major taking astronomy for fun and was already getting a B in the class so I gave the notes to the professor and moved on. If I could only prove what I understood intuitively I'd have been an astronomy major.
http://www.thunderbolts.info/ for info on galaxy formation, solar physics, and a bunch of other cool astrophysical stuff
And by info, you mean long discredited quack theories right? The electric universe theory which the site you linked to is widely dismissed by most physicists. It does however excite these people.
Does this