Intensity variation of the Fe K emission lines along the Galactic latitude

We carried out a Suzaku observation for 100 ksec on the Chandra deep observation region (1, b) approximate to (0.degrees 08, -1.degrees 42), and also reanalyzed the Chandra archival data. We found the Suzaku and Chandra GRXE absolute fluxes are consistent, and it is about twice of the Chandra total point source flux above 6 keV. We resolved the Fe K-complex component into the neutral or low-ionized (6.40 keV), He-like (6.67 keV) and H-like (6.97 keV) lines, and studied latitudinal dependence of the Fe line intensity, using multiple Suzaku pointings perpendicular to the Galactic plane. Consequently, we found not only Fe line fluxes but also their equivalent widths significantly decrease with Galactic latitudes. Our results are difficult to be reconciled with the point source model, but may be explained if there is some excess diffuse component of the GRXE accompaning hardly Fe line emission and has a larger Galactic scale height than that of the point sources.