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The first 1.1 mm continuum survey toward the Small Magellanic Cloud (SMC) wasperformed using the AzTEC instrument installed on the ASTE 10-m telescope. Thissurvey covered 4.5 deg$^2$ of the SMC with $1\sigma$ noise levels of $5-12$ mJybeam$^{-1}$, and 44 extended objects were identified. The 1.1 mm extendedemission has good spatial correlation with $Herschel$ 160 $\mathrm{\mu m}$,indicating that the origin of the 1.1 mm extended emission is thermal emissionfrom a cold dust component. We estimated physical properties using the 1.1 mmand filtered $Herschel$ data (100, 160, 250, 350, and 500 $\mathrm{\mu m}$).The 1.1 mm objects show dust temperatures of $17-45$ K and gas masses of$4\times10^3-3\times10^5~M_\odot$, assuming single-temperature thermal emissionfrom the cold dust with an emissivity index, $\beta$, of 1.2 and a gas-to-dustratio of 1000. These physical properties are very similar to those of giantmolecular clouds (GMCs) in our galaxy and the Large Magellanic Cloud. The 1.1mm objects also displayed good spatial correlation with the $Spitzer$ 24$\mathrm{\mu m}$ and CO emission, suggesting that the 1.1 mm objects trace thedense gas regions as sites of massive star formation. The dust temperature ofthe 1.1 mm objects also demonstrated good correlation with the 24 $\mathrm{\mum}$ flux connected to massive star formation. This supports the hypothesis thatthe heating source of the cold dust is mainly local star-formation activity inthe 1.1 mm objects. The classification of the 1.1 mm objects based on theexistence of star-formation activity reveals the differences in the dusttemperature, gas mass, and radius, which reflects the evolution sequence ofGMCs.

The 1.1 mm Continuum Survey of the Small Magellanic Cloud: Physical Properties and Evolution of the Dust-selected Clouds