Quantum study of reaction O(3P) + H2(v,j) $\rightarrow$ OH + H: OH formation in strongly UV-irradiated gas

no code implementations • 5 Mar 2021 • A. Veselinova, M. Agundez, J. R. Goicoechea, M. Menendez, A. Zanchet, E. Verdasco, P. G. Jambrina, F. J. Aoiz

In this study we calculate the dependence of the reaction rate coefficient on the rotational and vibrational state of H$_2$ and evaluate the impact on the abundance of OH in interstellar regions strongly irradiated by far-UV photons, where H2 can be efficiently pumped to excited vibrational states.

Astrophysics of Galaxies

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

A study of C4H3N isomers in TMC-1: line by line detection of HCCCH2CN

no code implementations • 21 Jan 2021 • N. Marcelino, B. Tercero, M. Agundez, J. Cernicharo

We present Yebes 40m telescope observations of the three most stable C4H3N isomers towards the cyanopolyyne peak of TMC-1.

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

Discovery of the acetyl cation, CH3CO+, in space and in the laboratory

no code implementations • 12 Jan 2021 • J. Cernicharo, C. Cabezas, S. Bailleux, L. Margules, R. Motiyenko, L. Zou, Y. Endo, C. Bermudez, M. Agundez, N. Marcelino, B. Lefloch, B. Tercero, P. de Vicente

Using the Yebes 40m and IRAM 30m radiotelescopes, we detected two series of harmonically related lines in space that can be fitted to a symmetric rotor.

Astrophysics of Galaxies