Astronomy Colloquium (2018 Fall Semester)

* Date.        Dec 06

* Speaker.   Suyeon Oh Chonnam National Univ.

* Title.          Observation of cosmic ray at Jang Bogo in Antarctica

* Abstract 

Cosmic ray flux is an important factor to response to solar eruptions. Its profile shows the decreasing shape by interaction of enhanced IMF¹ structure. When the solar eruptions such as SPEs² by flares arrive at the Earth, the profile of cosmic ray flux changes to sharp increasing shape at the ground neutron monitor. The former is well known as “Forbush decrease”, while the latter is known as “Ground level enhancement”. The first of neutron monitor by our group has installed at Daejeon in October, 2011. Another neutron monitor has been installed at Jang Bogo in Antarctica in December, 2015. The observational data by both neutron monitors have registered at NMDB³ this April. I introduce the brief installation of neutron monitor at Jang Bogo and cosmic ray research.

¹ IMF: interplanetary magnetic field

² SPEs: solar proton events

³ NMDB: Real-Time Database for high-resolution Neutron Monitor measurements

 (http://www01.nmdb.eu/data/)