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DOI | 10.1126/science.abb7535 |
Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering | |
Brett A. McGuire; Ryan A. Loomis; Andrew M. Burkhardt; Kin Long Kelvin Lee; Christopher N. Shingledecker; Steven B. Charnley; Ilsa R. Cooke; Martin A. Cordiner; Eric Herbst; Sergei Kalenskii; Mark A. Siebert; Eric R. Willis; Ci Xue; Anthony J. Remijan; Michael C. McCarthy | |
2021-03-19 | |
发表期刊 | Science |
出版年 | 2021 |
英文摘要 | Midinfrared spectroscopy has shown that polycyclic aromatic hydrocarbons (PAHs) are abundant in many astronomical objects, but this technique cannot determine which specific PAH molecules are present. Radio astronomy could provide individual identifications if the molecule is sufficiently abundant and has a large dipole moment, but PAHs are expected to produce large numbers of very weak lines. McGuire et al. performed a stacking and matched filter analysis to search for PAHs in radio observations of TMC-1, located within the interstellar Taurus Molecular Cloud. They identified emission from two isomers of the small PAH cyanonapthalene, two fused benzene rings with a CN group attached. Science , this issue p. [1265][1] Unidentified infrared emission bands are ubiquitous in many astronomical sources. These bands are widely, if not unanimously, attributed to collective emissions from polycyclic aromatic hydrocarbon (PAH) molecules, yet no single species of this class has been identified in space. Using spectral matched filtering of radio data from the Green Bank Telescope, we detected two nitrile-group–functionalized PAHs, 1- and 2-cyanonaphthalene, in the interstellar medium. Both bicyclic ring molecules were observed in the TMC-1 molecular cloud. In this paper, we discuss potential in situ gas-phase PAH formation pathways from smaller organic precursor molecules. [1]: /lookup/doi/10.1126/science.abb7535 |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/319941 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Brett A. McGuire,Ryan A. Loomis,Andrew M. Burkhardt,et al. Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering[J]. Science,2021. |
APA | Brett A. McGuire.,Ryan A. Loomis.,Andrew M. Burkhardt.,Kin Long Kelvin Lee.,Christopher N. Shingledecker.,...&Michael C. McCarthy.(2021).Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering.Science. |
MLA | Brett A. McGuire,et al."Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering".Science (2021). |
条目包含的文件 | 条目无相关文件。 |
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