Search for an interstellar Si_2C molecule: A theoretical prediction

摘要

We suggest that Si_2C molecule may be identified in astronomical objects through its transitions 4_(14) → 5_(05), 5_(15) → 6_(06), 2_(12) → 3_(03), 3_(13) → 4_(04), and 1_(11) → 2_(02) 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.