Anisotropy in cosmic-ray arrival directions in the southern hemisphere based on six years of data from the IceCube detector

Abstract:

In the last few decades, a number of experiments have provided long-term, statistically significant evidence of a faint sidereal anisotropy in the cosmic-ray arrival direction distribution across six orders of magnitude in energy, from tens of GeV to tens of PeV. The small amplitude of the observed large-scale anisotropy, of the order of 10− 4–10− 3, alongside the energy-dependent morphology and angular structure, hints at multiple phenomenological contributions to the observations. Muon detectors in the Northern Hemisphere observed cosmic-ray anisotropy from energies of several tens to hundreds of GeV, which is beyond the direct influence of the solar wind (Nagashima et al. 1998; Hall et al. 1999; Munakata et al. 2010). Various surface arrays and underground detectors reported observations in the TeV energy range (Amenomori et al. 2005, 2006; Guillian et al. 2007; Abdo et al. 2008, 2009; De Jong et al. 2011 …

Año de publicación:

2016

Keywords:

Fuente:

google