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Synthesis of Complex Organics in Planetary Nebulae

Published online by Cambridge University Press:  06 October 2025

Sun Kwok Open the ORCID record for Sun Kwok [Opens in a new window] ,
SeyedAbdolreza Sadjadi  and
Yong Zhang Open the ORCID record for Yong Zhang [Opens in a new window]
Sun Kwok*
Affiliation:
Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, Canada Laboratory for Space Research, The University of Hong Kong, Hong Kong, China
SeyedAbdolreza Sadjadi
Affiliation:
Laboratory for Space Research, The University of Hong Kong, Hong Kong, China
Yong Zhang
Affiliation:
Laboratory for Space Research, The University of Hong Kong, Hong Kong, China School of Physics & Astronomy, Sun Yat Sen University, Zhuhai, China
*
Email: sunkwok@hku.hk
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Abstract

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A family of unidentified infrared emission (UIE) bands is widely observed in planetary nebulae. We suggest that the carriers of the UIE bands are mixed aromatic/aliphatic organic nanoparticles (MAONs) synthesized over thousand-year time scales in the nebulae. The possible chemical pathways of synthesis is discussed. These organics are ejected into the interstellar medium and could have enriched the primordial Solar System, leading to the reservoir of complex organics in comets, asteroids, planetary satellites, and interplanetary dust particles.

Keywords

stars: AGB and post-AGBISM: moleculesplanetary nebulae: general

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S384: Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics , December 2023 , pp. 239 - 244
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

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