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We present a serendipitous detection of the infrared-bright supernova remnant(SNR) B0104-72.3 in the Small Magellanic Cloud by the Infrared Camera (IRC)onboard AKARI. An elongated, partially complete shell is detected in all fourobserved IRC bands covering 2.6-15 um. The infrared shell surrounds radio,optical, and X-ray emission associated with the SNR and is probably a radiativeSNR shell. This is the first detection of a SNR shell in this near/mid-infraredwaveband in the Small Magellanic Cloud. The IRC color indicates that theinfrared emission might be from shocked H2 molecules with some possiblecontributions from ionic lines. We conclude that B0104-72.3 is a middle-agedSNR interacting with molecular clouds, similar to the Galactic SNR IC 443. Ourresults highlight the potential of AKARI IRC observations in studying SNRs,especially for diagnosing SNR shocks.

AKARI Detection of the Infrared-Bright Supernova Remnant B0104-72.3 in the Small Magellanic Cloud