Prof. Glennys Farrar (New York University)
7/31/15, 11:00 AM
Our understanding of the Galactic magnetic field (GMF) has improved tremendously in recent years. The Jansson-Farrar (2012) (JF12) GMF model is currently the most realistic and comprehensive model available. It was constrained by fitting all-sky Faraday Rotation Measures of ~40k extragalactic sources, simultaneously with WMAP polarized (Q,U) and total synchrotron emission maps, which together...
Gero Müller (Phys. Institute 3A, RWTH Aachen University)
7/31/15, 11:15 AM
We propose to perform an independent test of recent galactic magnetic field parameterizations, and to obtain information on the origin of cosmic rays. Based on 3D simulations of cosmic nuclei from their sources to observation, we determine the average expected arrival direction for protons. As energy decreases, the average direction is expected to move away from the source line of...
Dr Yanping Chen (NYU Abu Dhabi)
7/31/15, 11:30 AM
Studies discerning whether there is a significant correlation between UHECR arrival directions and optical AGN are hampered by the lack of a uniformly selected and complete all-sky AGN catalog. To remedy this, we are preparing such a catalog based on the 2MASS Redshift Survey (2MRS), a spectroscopic sample of ~45,000 galaxies complete to a K magnitude of 11.75 over 91% of the sky. We have...
Radomir Smida (Karlsruhe Institute of Technology)
7/31/15, 11:45 AM
Arrival directions of ultra-high energy cosmic rays from the direction to one of the brightest radio source Virgo A were studied with recent models of the Galactic magnetic field. The obtained image of this radiogalaxy is similar for all studied models and it is unique in the comparison with images of other possible point source candidates. We present a method suitable for identifying cosmic...
880. Northern sky Galactic Cosmic Ray anisotropy between 10-1000 TeV with the Tibet Air Shower Array
Zhaoyang Feng (IHEP)
7/31/15, 12:00 PM
We report on the observation of the large-scale sidereal anisotropy of Galactic Cosmic Rays (GCRs) between 10 TeV and 1 PeV, with the data collected by the Tibet Air Shower experiment between October 1995 and February 2010. The energy resolution is improved and the data with zenith angle up to 60 degrees is used.The two-dimensional intensity map with declination from -30 degree to 90 degree at...
657. A simple model of the cosmic ray spectrum and composition across the Galactic to extragalactic transition
Dr Noemie Globus (Tel-Aviv University)
7/31/15, 12:15 PM
We present a simple theoretical and phenomenological model accounting for the evolution of the cosmic-ray spectrum and composition with energy, based on the available data over the entire spectrum. We show that there is no need to postulate any additional component, other than one single Galactic component depending on rigidity alone, and one extragalactic component, whose characteristics are...