Time dependent chemical study of contracting interstellar clouds. I. Abundances of nitrogen- and carbon-bearing molecules |
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| Authors: | M Y Amin M S El Nawawy B G Ateya A Aiad |
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| Institution: | (1) Astronomy Department, Faculty of Science, Cairo University, Egypt;(2) Physics Department, Faculty of Science, U.A.E. Univ., Al-Ain, United Arab Emirates;(3) Chemistry Department Faculty of Science, Cairo University, Egypt;(4) Astronomy Department, Faculty of Science, King Saud University, Saudi Arabia |
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| Abstract: | We have constructed a reaction system containing the chemical families of H, C, O, N, S, Si, Cl, metals (Me) and grains. A total of 104 species have been included and a network of 557 reactions has been studied. The chemical kinetic equations were integrated as a function of time by using gear program. The chemical reaction system was followed at low, intermediate and high cloud densities i.e. from 10–107 particles cm-3. The calculated fractional abundances of N2, CN, HCN, and CH which are in good agreement with the results of observations and with those of previous theoretical studies. |
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