We observed the molecular transitions of 12CO(1−0) 12CO(1−0) , 13CO(1−0) 13CO(1−0) , C18O(1−0) C18O(1−0) , CS(2-1), HCO+(1−0) HCO+(1−0) , and HCN(1-0) toward the high-latitude mole cular cloud MBM12. We derived total H2 H2 column densities for the two velocity components using the optically thin C18O C18O transition. Molecular abundances have been derived for the observed species at the core of this cloud, which appear to be less than an order of magnitude in fractional abundances relative to H2 H2 , compared to typical cold dark clouds.

• 민영철(한국표준과학연구소 천문대) | Min Yeong-Cheol
• 오병렬(한국표준과학연구소 천문대) | O Byeong-Ryeol
• 이영웅(한국표준과학연구소 천문대) | Lee Yeong-Ung