Theoretical microwave spectra of interstellar nitrogen-containing PAHs.

The recent discovery of naphthalene (CH) in cyano-substituted polycyclic aromatic hydrocarbon (CN-PAH) form in the Taurus molecular cloud (TMC-1) has sparked curiosity regarding the search for other nitrogen-containing naphthalenes in similar interstellar environments. In this light, naphthalenes having N atoms in the structure are promising candidates to be searched for in cold, dark molecular clouds such as TMC-1. Since obtaining data on such samples in the laboratory is complicated, the present work reports theoretical microwave spectra of naphthalene in all N-substituted forms.

A comprehensive rotational study of astronomical iso-pentane within 84 to 111 GHz.

The rotational line survey by ALMA (Atacama Large Millimeter/submillimeter Array) recently revealed the presence of i-CHCN (i-PrCN) and n-CHCN (n-PrCN) in 3-mm atmospheric window between 84 to 111 GHz towards the hot core region Sagittarius B2(N) (Sgr B2(N)). This was the first interstellar detection of a linear straight chain molecule. In this light, we report the rotational spectra of CH isomeric group in the same frequency range.