A steady-state calculation of column densities of interstellar species toward [Zeta] Ophiuchi, [Omicron] Persei and Lynds 134

Abstract

Calculations of column densities of some 100 interstellar species based on a steady-state analysis are carried out for interstellar clouds towards [zeta] Oph, [omicron] Per, and Lynds 134, using appropriate cloud models and physical conditions. The observed column densities of CH, OH, and CO are well reproduced by calculations. However, the calculated column densities of CH[superscript +] and C[subscript 2] show somewhat large discrepancies from the observed values. No explanation was found for these discrepancies. Column densities of species including [superscript 13]C are also calculated for L134.