The Pierre Auger Collaboration
- M. Will, L. Wiencke, M. Ziolkowski
- Physics
- 1 June 2013
The Pierre Auger Collaboration has reported evidence for anisotropies in the arrival directions of cosmic rays with energies larger thanEth = 55 EeV. There is a correlation above the isotropic…
The Pierre Auger Cosmic Ray Observatory
- A. Aab, P. Abreu, F. Zuccarello
- Physics
- 1 June 1998
Artificial ‘spin ice’ in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- R. F. Wang, C. Nisoli, P. Schiffer
- PhysicsNature
- 19 January 2006
This work reports an artificial geometrically frustrated magnet based on an array of lithographically fabricated single-domain ferromagnetic islands, arranged such that the dipole interactions create a two-dimensional analogue to spin ice, behaviour which is strikingly similar to the low-temperature state of spin ice.
Slow Drag in a Granular Medium
- R. Albert, M. Pfeifer, A. Barabasi, P. Schiffer
- Physics, Engineering
- 1999
We have studied the drag force acting on an object moving with low velocity through a granular medium. Although the drag force is a dynamic quantity, its behavior in this regime is dominated by the…
Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
- The Pierre Auger Collaboration P. Abreu, M. Aglietta, M. Ziolkowski
- Physics
- 9 September 2010
SEARCHES FOR ANISOTROPIES IN THE ARRIVAL DIRECTIONS OF THE HIGHEST ENERGY COSMIC RAYS DETECTED BY THE PIERRE AUGER OBSERVATORY
- A. Aab, P. Abreu, F. Zuccarello
- Physics
- 1 May 2015
We analyze the distribution of arrival directions of ultra-high-energy cosmic rays recorded at the Pierre Auger Observatory in 10 years of operation. The data set, about three times larger than that…
Measurement of the depth of maximum of extensive air showers above 10{18} eV.
- J. Abraham, P. Abreu, M. Ziolkowski
- PhysicsPhysical Review Letters
- 5 March 2010
The measurement of the depth of maximum, X{max}, of the longitudinal development of air showers induced by cosmic rays is described and the interpretation of these results in terms of the cosmic ray mass composition is briefly discussed.
Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory
- T. P. A. C. A. Aab, P. Abreu, F. Zuccarello
- Physics
- 21 April 2015
Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the Surface Detector array (SD) of the Pierre Auger Observatory. We report here on searches through Auger data…
Synthesis of Fe Oxide Core/Au Shell Nanoparticles by Iterative Hydroxylamine Seeding
- J. L. Lyon, D. A. Fleming, M. Stone, P. Schiffer, M. E. Williams
- Chemistry, Physics
- 20 March 2004
Water-soluble, Au-coated magnetic Fe oxide nanoparticles with diameters ∼60 nm were synthesized by the reduction of Au3+ onto the surfaces of ∼9 nm diameter particles consisting of either γ-Fe2O3 or…
...
...