Discovery of fulvenallene in TMC-1 with the QUIJOTE line survey
| العنوان: | Discovery of fulvenallene in TMC-1 with the QUIJOTE line survey |
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| المؤلفون: | J. Cernicharo, R. Fuentetaja, M. Agúndez, R. I. Kaiser, C. Cabezas, N. Marcelino, B. Tercero, J. R. Pardo, P. de Vicente |
| المساهمون: | European Commission, Ministerio de Ciencia, Innovación y Universidades (España) |
| بيانات النشر: | arXiv, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Molecular data, Space and Planetary Science, Line: identification, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astronomy and Astrophysics, ISM: individual objects: TMC-1, Astrophysics - Astrophysics of Galaxies, ISM: molecules, Astrochemistry |
| الوصف: | 11 pags., 5 figs., 4 tabs. We report the detection of fulvenallene (c-C5H4CCH2) in the direction of TMC-1 with the QUIJOTE1 line survey. Thirty rotational transitions with Ka = 0,1,2,3 and J = 9-15 were detected. The best rotational temperature fitting of the data is 9 K and a derived column density is (2.7 ± 0.3) × 1012 cm-2, which is only a factor of 4.4 below that of its potential precursor cyclopentadiene (c-C5H6), and 1.4-1.9 times higher than that of the ethynyl derivatives of cyclopentadiene. We searched for fulvene (c-C5H4CH2), a CH2 derivative of cyclopentadiene, for which we derive a 3σ upper limit to its column density of (3.5 ± 0.5) × 1012 cm-2. Upper limits were also obtained for toluene (C6H5CH3) and styrene (C6H5C2H3), the methyl and vinyl derivatives of benzene. Fulvenallene and ethynyl cyclopentadiene are likely formed in the reaction between cyclopentadiene (c-C5H6) and the ehtynyl radical (CCH). However, the bottom-up gas-phase synthesis of cycles in TMC-1 underestimates the abundance of cyclopentadiene by two orders of magnitude, which strengthens the need to study all possible chemical pathways to cyclisation in cold dark cloud environments, such as TMC-1. However, the inclusion of the reaction between C3H3+ and C2H4 produces a good agreement between model and observed abundances. We thank ERC for funding through grant ERC-2013-Syg610256-NANOCOSMOS. We also thank Ministerio de Ciencia e Innovación of Spain (MICIU) for funding support through projects PID2019-106110GB-I00, PID2019-107115GB-C21, and PID2019-106235GB-I00. |
| DOI: | 10.48550/arxiv.2207.09369 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24ea85aaf2ab7e49ac15ce7e586c4e78 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....24ea85aaf2ab7e49ac15ce7e586c4e78 |
| قاعدة البيانات: | OpenAIRE |
| DOI: | 10.48550/arxiv.2207.09369 |
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