Is There Any Linkage between Interstellar Aldehyde and Alcohol?
Journal article, 2021

It is speculated that there might be some linkage between interstellar aldehydes and their corresponding alcohols. Here an observational study and astrochemical modeling are coupled together to illustrate the connection between them. The ALMA cycle 4 data of a hot molecular core, G10.47+0.03, are utilized for this study. Various aldehydes (acetaldehyde, propanal, and glycolaldehyde), alcohols (methanol and ethylene glycol), and a ketone (acetone) are identified in this source. The excitation temperatures and column densities of these species were derived via the rotation diagram method assuming local thermodynamic equilibrium conditions. An extensive investigation is carried out to understand the formation of these species. Six pairs of aldehyde-alcohol are considered for this study: (i) methanal and methanol, (ii) ethanal and ethanol, (iii) propanal and 1-propanol, (iv) propenal and allyl alcohol, (v) propynal and propargyl alcohol, and (vi) glycolaldehyde and ethylene glycol. One pair of ketone-alcohol (acetone and isopropanol) and ketene-alcohol (ethenone and vinyl alcohol) are also considered. Two successive hydrogenation reactions in the ice phase are examined to form these alcohols from aldehydes, ketone, and ketene, respectively. Quantum chemical methods are extensively executed to review the ice-phase formation route and the kinetics of these species. Based on the obtained kinetic data, astrochemical modeling is employed to derive the abundances of these aldehydes, alcohols, ketone, and ketene in this source. It is seen that our model could successfully explain the observed abundances of various species in this hot molecular core.


Suman Kumar Mondal

Indian Centre for Space Physics

Prasanta Gorai

Indian Centre for Space Physics

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

Milan Sil

Indian Centre for Space Physics

Rana Ghosh

Indian Centre for Space Physics

Emmanuel E. Etim

Federal University Wukari

Sandip K. Chakrabarti

Indian Centre for Space Physics

Takashi Shimonishi

Niigata University

Naoki Nakatani

Hokkaido University

Tokyo Metropolitan University

Kenji Furuya

National Astronomical Observatory of Japan

University of Tsukuba

Jonathan Tan

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

University of Virginia

Ankan Das

Indian Centre for Space Physics

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 922 2 194

Subject Categories

Atom and Molecular Physics and Optics


Organic Chemistry



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