Oct 8 – 12, 2018
Ecole Supérieure de Chimie, Paris
Europe/Paris timezone

A Close Correlation between TA Hotspot UHECR Events and Local Filaments of Galaxies and its Implication

Oct 10, 2018, 5:35 PM
Friedel Amphitheater (Ecole Supérieure de Chimie, Paris)

Friedel Amphitheater

Ecole Supérieure de Chimie, Paris

Chimie ParisTech École Nationale Supérieure de Chimie de Paris 11, rue Pierre et Marie Curie 75231 PARIS Cedex 05
ORAL Sessions


Dr Jihyun Kim (UNIST)


The Telescope Array (TA) experiment identified a concentration of ultra-high-energy cosmic ray (UHECR) events on the sky, so-called hotspot. Besides the hotspot, the arrival directions of TA events show another characteristic feature, i.e., a deficit of events toward the Virgo cluster. As an effort to understand the sky distribution of TA events, we investigated the structures of galaxies around the hotspot region in the local universe. We here report a finding that there are filaments of galaxies, connected to the Virgo Cluster, and a correlation of statistical significance between the galaxy filaments and TA events. We then present an astrophysical model to explain the origin of the hotspot and the deficit of TA events.

Primary authors

Dr Jihyun Kim (UNIST) Prof. Dongsu Ryu (UNIST) Prof. Hyesung Kang (Pusan National University) Dr Suk Kim (Korea Astronomy and Space Science Institute) Prof. Soo-Chang Rey (Chungnam National University)

Presentation materials