Correlation of the Highest-energy Cosmic Rays with Nearby Extragalactic Objects
On the Cover: All-sky projection of highest-energy cosmic rays detected by the Pierre Auger Observatory (open circles) that are correlated with the positions of nearby quasars (crosses), a measure of the local galaxy distribution. The supergalactic and Milky Way planes are marked. The background shows a composite image of a nearby galaxy (M82) observed by NASA’s Spitzer, Hubble, and Chandra space observatories.
Composite image: Kelly Krause/Science (figure: Auger Collaboration; photo: NASA/JPL-Caltech/STScI/Chandra X-ray Center/Univ. of Arizona/ESA/AURA/Johns Hopkins Univ.)
The Pierre Auger Collaboration, 9 November 2007. Correlation of the highest-energy cosmic rays with nearby extragalactic objects. Science 318 (5852), pp. 938-943
Gregory Snow, a member of the Pierre Auger Collaboration, is professor of physics and astronomy and associate dean of research in the College of Arts and Sciences.