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We present the result of near-infrared (near-IR) [Fe II] line mapping of thesupernova remnant IC443 with the IRSF/SIRIUS, using the two narrow-band filterstuned for the [Fe II] 1.257 micron and [Fe II] 1.644 micron lines. Covering alarge area of 30' x 35', our observations reveal that [Fe II] filamentarystructures exist all over the remnant, not only in an ionic shock shell, butalso in a molecular shock shell and a central region inside the shells. Withthe two [Fe II] lines, we performed corrections for dust extinction to derivethe intrinsic line intensities. We also obtained the intensities of thermalemission from the warm dust associated with IC443, using the far- and mid-IRimages taken with AKARI and Spitzer, respectively. As a result, we find thatthe [Fe II] line emission relative to the dust emission notably enhances in theinner central region. We discuss causes of the enhanced [Fe II] line emission,estimating the Fe+ and dust masses.

Large-area [Fe II] Line Mapping of the Supernova Remnant IC443 with the IRSF/SIRIUS