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We present the results of a spatially resolved spectral analysis from fourSuzaku observations covering the northeastern rim of the Cygnus Loop. Atwo-kT_e non-ionization equilibrium (NEI) model fairly well represents ourdata, which confirms the NEI condition of the plasma there. The metalabundances are depleted relative to the solar values almost everywhere in ourfield of view. We find abundance inhomogeneities across the field: thenorthernmost region (Region A) has enhanced absolute abundances compared withother regions. In addition, the relative abundances of Mg/O and Fe/O in RegionA are lower than the solar values, while those in the other regions are twicehigher than the solar values. As far as we are concerned, neither acircumstellar medium, fragments of ejecta, nor abundance inhomogeneities of thelocal interstellar medium around the Cygnus Loop can explain the relativelyenhanced abundance in Region A. This point is left as an open question forfuture work.

Abundance Inhomogeneity in the Northeastern Rim of the Cygnus Loop Revealed by Suzaku Observatory