THE SPATIAL DISTRIBUTIONS OF SO AND N2H-MOLECULAR-CLOUD-1 (TMC-1)( INTAURUS)

Mapping observations were carried out toward the dark cloud, Taurus Mo lecular Cloud-1 (TMC-1) with the SO J(N) = 3(2) - 2(1) and N2H+ J = 1 - 0 Lines using the Nobeyama 45-m radiotelescope; Several local maximu m positions of the SO and N2H+ line intensities were found in the TMC- 1 ridge. The lines of SO and N2H+ are found to be more intense in the northwest part of the TMC-1 ridge than in the southeast part, showing that the spatial distributions of these species are rather well correl ated with that of NH3, and are anti-correlated with those of carbon-ch ain molecules. Based on considerations of the synthetic mechanisms of SO and N2H+, their spatial distribution in TMC-1 can be explained main ly due to the. differences in the chemical evolutionary stages between the northwest and southeast regions in TMC-1.