오리온 분자운에서의 ${H_2}^{13}CO$ 천이선의 관측

OBSERVATIONS OF THE ${H_2}^{13}CO$ LINES TOWARD OMC-1

We observed the 2 mm ortho and para transitions of ${H_2}^{13}CO$ toward the Orion Molecular Cloud-1 using the 12 m NRAO telescope at Kitt Peak. Total column densities of $3{\times}10^{14}$ and $2.8{\times}10^{12}\;cm^{-2}$ have been derived at KL and the approximately 3 are minute north from the KL (3N) position, respectively. We discuss the abundances, ortho/para ratios and its chemical implications.