Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature
IntroductionThe 21 μm emission feature discovered in a small sample of carbon-rich protoplanetary nebulae has remained unidentified for over 30 years. A dozen of different molecular species (both organics and inorganics) have been proposed as the carrier candidates of this important feature, among w...
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Frontiers Media S.A.
2024-11-01
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| Series: | Frontiers in Astronomy and Space Sciences |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fspas.2024.1489982/full |
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| author | Xuan-Xiang Liao Yong Zhang Yong Zhang SeyedAbdolreza Sadjadi |
| author_facet | Xuan-Xiang Liao Yong Zhang Yong Zhang SeyedAbdolreza Sadjadi |
| author_sort | Xuan-Xiang Liao |
| collection | DOAJ |
| description | IntroductionThe 21 μm emission feature discovered in a small sample of carbon-rich protoplanetary nebulae has remained unidentified for over 30 years. A dozen of different molecular species (both organics and inorganics) have been proposed as the carrier candidates of this important feature, among which polycyclic aromatic hydrocarbons (PAHs) and fulleranes (hydrogenated fullerenes) have yet to be sufficiently examined.MethodIn this study, we attempt to fit the 21 μm features in observed spectra of the above-mentioned astronomical sources via theoretically simulated spectra of various PAHs and fulleranes, aiming to investigate whether the two hydrocarbon families can reproduce the 21 μm feature.Results and DiscussionBased on the fitting outcomes we conclude that fulleranes can provide a more plausible explanation for the origin of 21 μm feature than PAHs. |
| format | Article |
| id | doaj-art-92c71f5735ca4a3280757b6db5caf96b |
| institution | OA Journals |
| issn | 2296-987X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Astronomy and Space Sciences |
| spelling | doaj-art-92c71f5735ca4a3280757b6db5caf96b2025-08-20T02:13:44ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2024-11-011110.3389/fspas.2024.14899821489982Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission featureXuan-Xiang Liao0Yong Zhang1Yong Zhang2SeyedAbdolreza Sadjadi3School of Physics and Astronomy, Sun Yat-sen University, Zhuhai, Guangdong, ChinaSchool of Physics and Astronomy, Sun Yat-sen University, Zhuhai, Guangdong, ChinaThe Laboratory for Space Research, Faculty of Science, The University of Hong Kong, Hong KongSAR, ChinaThe Laboratory for Space Research, Faculty of Science, The University of Hong Kong, Hong KongSAR, ChinaIntroductionThe 21 μm emission feature discovered in a small sample of carbon-rich protoplanetary nebulae has remained unidentified for over 30 years. A dozen of different molecular species (both organics and inorganics) have been proposed as the carrier candidates of this important feature, among which polycyclic aromatic hydrocarbons (PAHs) and fulleranes (hydrogenated fullerenes) have yet to be sufficiently examined.MethodIn this study, we attempt to fit the 21 μm features in observed spectra of the above-mentioned astronomical sources via theoretically simulated spectra of various PAHs and fulleranes, aiming to investigate whether the two hydrocarbon families can reproduce the 21 μm feature.Results and DiscussionBased on the fitting outcomes we conclude that fulleranes can provide a more plausible explanation for the origin of 21 μm feature than PAHs.https://www.frontiersin.org/articles/10.3389/fspas.2024.1489982/fullinfraredpolycyclic aromatic hydrocarbonsfullerenesfulleranesprotoplanetary nebulaeastrochemistry |
| spellingShingle | Xuan-Xiang Liao Yong Zhang Yong Zhang SeyedAbdolreza Sadjadi Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature Frontiers in Astronomy and Space Sciences infrared polycyclic aromatic hydrocarbons fullerenes fulleranes protoplanetary nebulae astrochemistry |
| title | Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| title_full | Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| title_fullStr | Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| title_full_unstemmed | Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| title_short | Exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| title_sort | exploring the possibility of polycyclic aromatic hydrocarbons and fulleranes as the carrier of the 21 micron emission feature |
| topic | infrared polycyclic aromatic hydrocarbons fullerenes fulleranes protoplanetary nebulae astrochemistry |
| url | https://www.frontiersin.org/articles/10.3389/fspas.2024.1489982/full |
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