2009-06-27 超新星残骸による宇宙線加速 宇宙 Measuring the Cosmic Ray Acceleration Efficiency of a Supernova Remnant(Science Express) Milky Way's Particle Accelerators: Cosmic Rays Accelerated In Remnants Of Exploding Stars(ScienceDaily) Measuring the cosmic ray acceleration efficiency of a supernova remnant(arXiv:0906.4553)