| Main Board • cheap jordans for sale Store - CheapJordansStock |
| 02.03.2017, 09:57 - nieeshoes - Rank 6 - 1073 Posts
But none of the new data give clues to the positrons’ source, http://cheapjordansstock.com , said Katherine Freese, a theoretical astrophysicist at the University of Michigan in Ann Arbor. The trajectories of these charged particles can change as they move through magnetic fields, cheap wholesale jordans , she said, making it difficult to determine where the particles began their journey. Her bet is that rapidly spinning stars called pulsars produce positrons and fling them across the galaxy using extremely strong magnetic fields. “It will take a while to sort this out, cheap jordan shoes ,” she said. In the mid-1990s, physicists got a first peek at cosmic rays that could have resulted from dark matter annihilation. The High Energy Antimatter Telescope, cheap jordans free shipping , a cosmic ray detector attached to a high-altitude balloon, found an unexpectedly high number of positrons, a result that seemed to jibe with the idea that dark matter annihilation creates these charged particles. In the last five years two space-based detectors, PAMELA, for the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics, cheap real jordans , and the Fermi Gamma-ray Space Telescope, have found even more decisive evidence of excess positrons. Unfortunately for dark matter hunters, cheap jordans for sale , the specifics of the probes’ observations do not match up well with theories that predict cosmic rays resulting from dark matter annihilation. Along with electrons and positrons, dark matter annihilation should produce other signals like extra antiprotons (protons’ antimatter siblings), gamma rays and radio waves. But detectors have found no evidence of any of those signals. Researchers hope that AMS can bring clarity to this debate because of its leg up on other cosmic ray detectors. Among other strengths, its perch aboard the International Space Station means it can sample the full spectrum of cosmic rays above Earth’s atmosphere, cheap jordans , avoiding molecules in the air that prevent most cosmic rays from ever reaching the ground. AMS also sports a strong magnet and precise sensors that allow researchers to easily distinguish between particles that behave similarly, cheap air jordans , such as protons and positrons. http://www.kenklaudt.c...nsstock-com-2017-01-20-16 http://qtwork.tudelft....e.7CCheapjordansstock.com http://users.atw.hu/as...orum_topic&topic=9752 |