Wave mode contributing to the oxygen ion heating in the Earth's polar magnetosphere observed by the Akebono satellite

Shuji Onosawa1, Yuto Katoh1, Atsushi Kumamoto1, Yoshiya Kasahara2 and Naritoshi Kitamura3, (1)Tohoku University, Department of Geophysics, Graduate School of Science, Sendai, Japan, (2)Kanazawa University, Graduate School of Natural Science and Technology, Kanazawa, Japan, (3)Nagoya University, Nagoya, Japan