Synthesis and Spectroscopic Characterization of Interstellar Candidate Ethynyl Thiocyanate: HCCSCN

• Main Authors: Alonso, Elena R, Insausti, Aran, Kolesniková, Lucie, León, Iker, McGuire, Brett A, Shingledecker, Christopher N, Agúndez, Marcelino, Cernicharo, José, Rivilla, Víctor M, Cabezas, Carlos
• Format: Journal Article
• Language: English
• Published: 18-11-2024
• Subjects: Physics - Astrophysics of Galaxies
• DOI: 10.48550/arxiv.2411.11802

Elena R. Alonso et al 2024 ApJ 976 95 This work aims to spectroscopically characterize and provide for the first
time direct experimental frequencies of the ground vibrational state and two
excited states of the simplest alkynyl thiocyanate (HCCSCN) for astrophysical
use. Both microwave (8-16~GHz) and millimeter wave regions (50-120~GHz) of the
spectrum have been measured and analyzed in terms of Watson's semirigid rotor
Hamiltonian. A total of 314 transitions were assigned to the ground state of
HCCSCN and a first set of spectroscopic constants have been accurately
determined. Spectral features of the molecule were then searched for in Sgr
B2(N), NGC 6334I, G+0.693-0.027 and TMC-1 molecular clouds. Upper limits to the
column density are provided.