We discuss the near singularity region of the linear mass Vaidya metric for massless particles with nonzero angular momentum. In particular we look at massless geodesics near the vanishing point of a special subclass of linear mass Vaidya metrics. We also investigate this same structure in the numerical solutions for the scattering of the Maxwell field from the singularity. In both cases we find that the null-singularity effectively becomes repulsive close to the final vanishing point leading us to argue that this metric could be plausibly used as a semiclassical model for the endpoint of black hole evaporation.
COBISS.SI-ID: 3722491
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 from 1 January 2004 until 20 June 2013. No neutrino candidates were found, yielding a limit to the diffuse flux of ultrahigh energy neutrinos that challenges the Waxman-Bahcall bound predictions.
COBISS.SI-ID: 3928571
Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We characterize the energy distributions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis.
COBISS.SI-ID: 3945979