Dr
Andreas Haungs
(Karlsruhe Institute of Technology)
01/08/2011, 14:00
Cosmic rays above the knee
Oral
The detection of high-energy cosmic rays above a few hundred TeV is realized by the
observation of extensive air-showers. By using the multi-detector setup of
KASCADE-Grande the energy spectrum, elemental composition, and anisotropies of
high-energy cosmic rays in the energy range from below the knee up to 1 EeV are
investigated. The most distinct feature of the spectrum, the ‘knee’, is...
Dr
Hiroyuki Sagawa
(ICRR, University of Tokyo)
01/08/2011, 14:30
Cosmic rays above the knee
Oral
The Telescope Array (TA) Experiment is the largest experiment studying
ultrahigh energy cosmic rays in the northern hemisphere. TA is a hybrid
experiment, which means it consists of a large surface array of scintillation
counters plus three fluorescence detectors overlooking the surface array. TA
has been collecting data for about three years. Measurements of the spectrum
and...
Maria Monasor Monasor
(University of Chicago)
01/08/2011, 15:00
Cosmic rays above the knee
Oral
Due to its hybrid design, the Pierre Auger Observatory provides a variety of
independent experimental observables for the study of the composition of ultra-high
energy cosmic rays. Ground level measurements from the surface detector allow to
define composition sensitive parameters while the fluorescence detector provide a
direct observation of the depth of maximum development of the...
Prof.
katsuaki kasahara
(waseda university)
01/08/2011, 16:00
Cosmic rays above the knee
Oral
LHCf is an experiment at CERN LHC and is dedicated to measure photons and neutrons
in the very forward region to calibrate M.C event generator. Cosmic ray research over
10^14 eV normally uses air shower observation technique which must employ M.C
simulation to derive incident cosmic ray energy and species etc. Air shower
development is governed by the energetic secondary particles...
Dr
Sergey Ostapchenko
(Norwegian University for Science and Technology (NTNU))
01/08/2011, 16:20
Cosmic rays above the knee
Oral
The present status of high energy cosmic ray composition studies is discussed. In
particular, the issue of the model-dependence of experimental results is addressed.
The impact of recent LHC measurements on the interpretation of cosmic ray data is
investigated.
Mr
Denis Allard
(APC)
01/08/2011, 16:45
Cosmic rays above the knee
Oral
I will review the recent results of the Pierre Auger Observatory on the arrival
directions of ultrahigh-energy cosmic rays .
I will present the latest salient results of the Pierre Auger Observatory, namely the
current level of correlation between arrival directions of ultrahigh-energy air showers
and the direction of nearby active galactic nuclei, the diffuse excess of events in the...
Mr
Patrick Berghaus
(Bartol Research Institute, University of Delaware)
01/08/2011, 17:05
Cosmic rays above the knee
Oral
IceCube is composed of the surface array IceTop and the volume detector
InIce/DeepCore. This offers unique opportunities for cosmic-ray physics.
One major objective is the measurement of cosmic-ray composition around
and above the knee by correlating the electromagnetic content of air
showers to the high-energy muon yield.
Presented are first results from the surface array and
from...
Prof.
Peter Mészáros
(Pennsylvania State University)
01/08/2011, 17:30
Cosmic rays above the knee
Oral
I will review the arguments on which a GRB origin of
UHECR are based, including hypernovae-related models.
I will discuss recent calculations as well as mention
counterarguments and possible constraints.
Dr
Kumiko Kotera
(University of Chicago)
01/08/2011, 18:00
Cosmic rays above the knee
Oral
Newly-born magnetars are good candidates for the acceleration of ultrahigh energy
cosmic rays (Blasi et al. 00, Arons 03). We discuss issues related to the production
of ultrahigh energy heavy nuclei in newly-born magnetars, in light of the latest
results of the Auger Observatory.
Magnetars offer favorable sites for the injection of heavy nuclei (by stripping from
the star surface or...
Andrey Saveliev
(University of Hamburg)
01/08/2011, 18:20
Cosmic rays above the knee
Oral
After a general overview we discuss constraints on the size of Lorentz symmetry
breaking terms resulting from comparing measured ultra-high energy cosmic ray spectra
with theoretical predictions in the presence of Planck scale suppressed Lorentz
Invariance Violation (LIV). Finally, we will discuss how LIV tests could become more
sensitive in the future due to the anticipated progress in...
Dr
Shunsaku Horiuchi
(CCAPP, Ohio State University)
01/08/2011, 18:40
Cosmic rays above the knee
Oral
Recent results from the Pierre Auger Observatory show that the
composition of ultra-high energy cosmic rays (UHECR) becomes
increasingly heavier on average with energy. We discuss potential
sources of UHECR in light of these results. In particular, we
detail on how some models of GRBs naturally predict UHECRs
that can even be dominate by very heavy nuclei beyond iron.
We also discuss...
