from the high-energy-pinball dept.
eldavojohn writes "A paper recently accepted for publication (preprint here) proposes a sound explanation for the source of the gamma rays that permeate our galaxy. The Milky Way's central object Sagittarius A*, widely believed to be a supermassive black hole, is now suspected to be the source. To test this theory, two scientists created a computer model to track the protons, flung outward with energies up to 100 TeV by the intense magnetic fields near the event horizon, as they make a random walk through the plasma environment. It can take thousands of years for them to travel 10 light-years from the black hole, where they collide with lower-energy protons to form pions. These decay into gamma radiation emanating from a torus-shaped region around the central object."
from the pay-for-play-no-no dept.
Gr8Apes writes with a just-breaking AP story reporting that the FCC is wrapping up a settlement in which four major broadcast companies would pay the government $12.5 million and provide 8,400 half-hour segments of free airtime for independent record labels and local artists. The finish line is near after a 3-year investigation. An indie promoter is quoted: "It's absolutely the most historic agreement that the independent community has had with radio. Without a doubt, nothing else comes close."