Search for an interstellar Si₂C molecule: A theoretical prediction

摘要

We suggest that Si₂C molecule may be identified in astronomical objects through its transitions 4₁₄ → 5₀₅, 5₁₅ → 6₀₆, 2₁₂ → 3₀₃, 3₁₃ → 4₀₄, and 1₁₁ → 2₀₂ at 15.9, 5.1, 33.6, 24.9, and 42.3 GHz in absorption even against the cosmic 2.7 K background, in a region having low temperature. The absorption phenomenon is found rather large in the first two transitions. Dependence of results on the set of molecular parameters is discussed.