Physicists may not know what dark matter is, but they're getting a better idea of what it's not. Data from NASA's orbiting Fermi Gamma-ray Space Telescope puts a crimp in particle theorists' favored explanation of the mysterious stuff whose gravity holds the galaxies together, ruling out a hefty range of masses for the hypothesized particles, a team announced this week. Curiously, the result comes not from the Fermi team itself, but from other particle astrophysicists who analyzed the Fermi data.
makc wrote:too bad all the people who would post "I told you so" are banned
I'm glad they are, because anybody who would say that would be entirely missing the point of the article. Despite the title, this research doesn't argue against the existence of dark matter. It only serves to weed away some of the DM theories. Obviously, that needs to happen. There are many areas where a phenomenon is observed but multiple theories are available to explain it. It is the job of science to devise tests that eliminate some theories and support others, getting us closer to the truth.