Giseon Baek(Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea, Research Institute of Basic Sciences, Seoul National University, Seoul 08826, Republic of Korea)
Jeong-Eun Lee(Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea, SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea)
Neal J. Evans II(Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA)
Yuri Aikawa(Department of Astronomy, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan)
Jes K. Jørgensen(Niels Bohr Institute, University of Copenhagen, Copenhagen K., Denmark)