Discovery of the propargyl radical (CH2CCH) in TMC-1: one of the most abundant radicals ever found and a key species for cyclization to benzene in cold dark clouds

no code implementations • 5 Mar 2021 • M. Agundez, C. Cabezas, B. Tercero, N. Marcelino, J. D. Gallego, P. de Vicente, J. Cernicharo

The propargyl radical is thus one of the most abundant radicals detected in TMC-1, and it is probably the most abundant organic radical with a certain chemical complexity ever found in a cold dark cloud.

Astrophysics of Galaxies

Discovery of CH2CHCCH and detection of HCCN, HC4N, CH3CH2CN, and, tentatively, CH3CH2CCH in TMC-1

no code implementations • 22 Feb 2021 • J. Cernicharo, M. Agundez, C. Cabezas, N. Marcelino, B. Tercero, J. R. Pardo, J. D. Gallego, F. Tercero, J. A. Lopez-Perez, P. de Vicente

We present the discovery in TMC-1 of vinyl acetylene, CH2CHCCH, and the detection, for the first time in a cold dark cloud, of HCCN, HC4N, and CH3CH2CN.

Astrophysics of Galaxies

Space and laboratory discovery of HC3S+

no code implementations • 13 Jan 2021 • J. Cernicharo, C. Cabezas, Y. Endo, N. Marcelino, M. Agundez, B. Tercero, J. D. Gallego, P. de Vicente

We also searched for protonated C2S in TMC-1, based on ab initio calculations of its spectroscopic parameters, and derive a 3sigma upper limit of N(HC2S+) < 9e11 cm-2 and a C2S/HC2S+ > 60.

Astrophysics of Galaxies