Dark Matter's Profile Discovered?

pingbak writes "According to New Scientist, astronomers may have potentially discovered dark matter's EM profile (story). For the rest of us, this means astronomers may have just discovered all of the extra force holding the galaxy(-ies) together, which is not currently explainable though gravity and black holes at the center of universes alone. Since dark matter doesn't interact with ordinary matter, it's almost directly undetectable -- but now, physics and astronomy may just have had an awesome breakthrough. Nobel Prize material if it proves correct!"

Comments

good description of the kinds of dark matter

[rsdavis9]

http://www.astro.queensu.ca/~dursi/dm-tutorial/dm0 .html

From the link above there is:
1. cold dark ordinary matter(baryonic)
2. Non baryonic(exotic) dark matter both hot and cold

The article seems to indicate wilp(weakly interacting light particles instead of (in addition to) wimps(weakly interacting massive particles. Wilp's are like neutrinos. We have not discovered any wimps yet.

Re:Electrons?

[KDan]

There are many reasons, but one which you might look at is the large amounts of radiation coming from the galactic nucleus. As you may know, electrons absorb radiation and gain energy (velocity) when they do so.

Another explanation, if you take away the radiation, would involve a huge fermi sphere of electons which would require that only very few of them are sitting in that big gravity well with no kinetic energy.

There are other reasons why electrons would be very unlikely to be found at rest at the galactic core, but I think these will do.

Daniel