Synthesis of solid-state Complex Organic Molecules through accretion of simple species at low temperatures

Status Report From: e-Print archive
Posted: Tuesday, June 18, 2019

D. Qasim, G. Fedoseev, K.-J. Chuang, V. Taquet, T. Lamberts, J. He, S. Ioppolo, E. F. van Dishoeck, H. Linnartz

(Submitted on 15 Jun 2019)

Complex organic molecules (COMs) have been detected in the gas-phase in cold and lightless molecular cores. Recent solid-state laboratory experiments have provided strong evidence that COMs can be formed on icy grains through 'non-energetic' processes. In this contribution, we show that propanal and 1-propanol can be formed in this way at the low temperature of 10 K. Propanal has already been detected in space. 1-propanol is an astrobiologically relevant molecule, as it is a primary alcohol, and has not been astronomically detected. Propanal is the major product formed in the C2H2 + CO + H experiment, and 1-propanol is detected in the subsequent propanal + H experiment. The results are published in Qasim et al. (2019c). ALMA observations towards IRAS 16293-2422B are discussed and provide a 1-propanol:propanal upper limit of < 0.35 - 0.55, which are complemented by computationally-derived activation barriers in addition to the performed laboratory experiments.

Comments: Proceedings IAU Symposium No. 350, 2019, Laboratory Astrophysics: from Observations to Interpretation

Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Astrophysics of Galaxies (astro-ph.GA)

Cite as: arXiv:1906.06508 [astro-ph.SR] (or arXiv:1906.06508v1 [astro-ph.SR] for this version)

Submission history

From: Danna QasimĀ 

[v1] Sat, 15 Jun 2019 09:23:21 UTC (2,000 KB)

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