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Chemical Synthesis in the Circumstellar Environment Kwok, Sun

Abstract

We discuss the spectral distinctions between B[e] stars and compact planetary nebulae. The differentiation between proto-planetary nebulae, transition objects between the asymptotic giant branch and planetary nebulae, and reflection nebulae in binary systems is also discussed. Infrared and millimeter-wave observations have identified many inorganic and organic molecules, as well as solid-state minerals, in the circumstellar environment. There is evidence that complex organics in the form of mixed aromatic/aliphatic nanoparticles (MAONs) are synthesized during the proto-planetary nebulae phase of evolution. Their ejection into the interstellar medium may have enriched the primordial Solar System, and the complex organics found in comets, asteroids, and planetary satellites could be stellar in origin.

Item Metadata

Title
Chemical Synthesis in the Circumstellar Environment
Creator
Kwok, Sun
Publisher
Multidisciplinary Digital Publishing Institute
Date Issued
2025-04-03
Description
We discuss the spectral distinctions between B[e] stars and compact planetary nebulae. The differentiation between proto-planetary nebulae, transition objects between the asymptotic giant branch and planetary nebulae, and reflection nebulae in binary systems is also discussed. Infrared and millimeter-wave observations have identified many inorganic and organic molecules, as well as solid-state minerals, in the circumstellar environment. There is evidence that complex organics in the form of mixed aromatic/aliphatic nanoparticles (MAONs) are synthesized during the proto-planetary nebulae phase of evolution. Their ejection into the interstellar medium may have enriched the primordial Solar System, and the complex organics found in comets, asteroids, and planetary satellites could be stellar in origin.
Subject
asymptotic giant branch stars; planetary nebulae; molecules; infrared spectroscopy; organics
Genre
Article
Type
Text
Language
eng
Date Available
2025-05-14
Provider
Vancouver : University of British Columbia Library
Rights
CC BY 4.0
DOI
10.14288/1.0448878
URI
http://hdl.handle.net/2429/91125
Affiliation
Science, Faculty of; Earth, Ocean and Atmospheric Sciences, Department of
Citation
Galaxies 13 (2): 36 (2025)
Publisher DOI
10.3390/galaxies13020036
Peer Review Status
Reviewed
Scholarly Level
Faculty; Researcher
Rights URI
https://creativecommons.org/licenses/by/4.0/
Aggregated Source Repository
DSpace

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CC BY 4.0