The Possibility of Forming Propargyl Alcohol in the Interstellar Medium

Abstract : Propargyl alcohol (HC2CH2OH, PA) has yet to be observed in the interstellar medium (ISM) although one of its stable isomers, propenal (CH2CHCHO), has already been detected in Sagittarius B2(N) with the 100-meter Green Bank Telescope in the frequency range $18-26$ GHz. In this paper, we investigate the formation of propargyl alcohol along with one of its deuterated isotopomers, HC2CH2OD(OD-PA), in a dense molecular cloud. Various pathways for the formation of PA in the gas and on ice mantles surrounding dust particles are discussed. We use a large gas-grain chemical network to study the chemical evolution of PA and its deuterated isotopomer. Our results suggest that gaseous HC2CH2OH can most likely be detected in hot cores or in collections of hot cores such as the star-forming region Sgr B2(N). A simple LTE (Local thermodynamic equilibrium) radiative transfer model is employed to check the possibility of detecting PA and OD-PA in the millimeter-wave regime. In addition, we have carried out quantum chemical calculations to compute the vibrational transition frequencies and intensities of these species in the infrared for perhaps future use in studies with the James Webb Space Telescope (JWST).
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Article dans une revue
Molecular Astrophysics, Elsevier, 2017, Accepted for the publication in Molecular Astrophysics 2017
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https://hal.archives-ouvertes.fr/hal-01447010
Contributeur : Marie-Paule Pomies <>
Soumis le : jeudi 26 janvier 2017 - 15:11:10
Dernière modification le : mercredi 4 octobre 2017 - 16:02:08

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Prasanta Gorai, Ankan Das, Liton Majumdar, Sandip Kumar Chakrabarti, Bhalamurugan Sivaraman, et al.. The Possibility of Forming Propargyl Alcohol in the Interstellar Medium. Molecular Astrophysics, Elsevier, 2017, Accepted for the publication in Molecular Astrophysics 2017. 〈hal-01447010〉

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