CO core candidates in the Gemini molecular cloud

We present observations of a 4 square degree area toward the Gemini cloud obtained using J = 1–0 transitions of ¹²CO, ¹³CO, and C¹⁸O. No C¹⁸O emission was detected. This region is composed of 36 core candidates of ¹³CO. These core candidates have characteristic diameters of 0.25 pc, excitation temperatures of 7.9 K, line widths of 0.54 km s⁻¹, and mean masses of 1.4 $M_{\odot }$. They are likely to be starless core candidates or transient structures, which probably disperse after ∼10⁶ years.