| Issue |
A&A
Volume 677, September 2023
|
|
|---|---|---|
| Article Number | A166 | |
| Number of page(s) | 8 | |
| Section | Atomic, molecular, and nuclear data | |
| DOI | https://doi.org/10.1051/0004-6361/202347023 | |
| Published online | 22 September 2023 | |
Detection of ethynylbenzene in TMC-1 and the interstellar search for 1,2-diethynylbenzene★
1
Deutsches Elektronen-Synchrotron DESY,
Notkestr. 85,
22607
Hamburg,
Germany
e-mail: melanie.schnell@desy.de
2
Grupo de Astrofísica Molecular, Instituto de Física Fundamental (IFF-CSIC),
C/ Serrano 121,
28006
Madrid,
Spain
3
Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid,
47011
Valladolid,
Spain
e-mail: amanda.steber@uva.es
4
Christian-Albrechts-Universität zu Kiel, Institute of Physical Chemistry,
24118
Kiel,
Germany
Received:
26
May
2023
Accepted:
17
July
2023
Aims. We investigate the outcome of an electrical discharge of naphthalene and search for the resulting products in the Taurus Molecular Cloud (TMC-1).
Methods. Using chirped pulse Fourier transform microwave spectroscopy paired with an electric discharge source, we investigated products resulting from the naphthalene discharge. Quantum chemical calculations were used to help assign species and investigate potential reaction pathways relevant to the interstellar medium. These products were searched for in TMC-1 using the QUIJOTE line survey, covering 31.0-50.3 GHz.
Results. We confirm the detection of ethynylbenzene in TMC-1, and we also present a new molecular species, 1,2-diethynylbenzene, which could play an important role in the formation of naphthalene. Over ten products have been identified as resulting from the discharge, with only one of these species found in a previous IR-UV discharge study of naphthalene.
Conclusions. Ethynylbenzene has definitively been detected in TMC-1, and while we have identified a potentially important species for the formation of naphthalene and an exothermic reaction pathway, there is no current indication of its presence in TMC-1.
Key words: astrochemistry / ISM: molecules / ISM: individual objects: TMC-1 / methods: laboratory: molecular / molecular processes
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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