Origin of the 6.4-keV line of the Galactic Ridge X-ray Emission

T. G. Tsuru, H. Uchiyama, K. K. Nobukawa +5

We report the first results from high-statistics observation of the 6.4-keV line in the region of $l=+1.5^{\circ }$ to $+3.5^{\circ }$ (hereafter referred to as GC East), with the goal…