First Results of a CO Survey of the Small Magellanic Cloud with NANTEN

We present the first results from a new 12CO (J = 1 -- 0) survey of the Small Magellanic Cloud (SMC) with the NANTEN millimeter-wave telescope. The survey covered the northeast and southwest regions of the main Bar, and the H ii regions N 84, N 88 in the Wing at a linear resolution of ~ 50 \,pc. Twenty-one giant molecular clouds (GMCs), whose masses are ~ 10⁴ -- 10⁶ \,M_, were identified. Significant CO emission, TR^ ~ 0.36 \,K, was first detected toward the N 84 region in the Wing, which is comparable to those of the prominent CO clouds associated with infrared sources LIRS 36, LIRS 49 in the Bar. The GMCs exhibit a good spatial correlation with the H ii regions and young clusters, indicating that cluster formation is on-going in these GMCs. On the other hand, they show little correlation with older clusters or with supernova remnants, suggesting rapid dissipation of CO.