Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering

doi:10.1126/science.abb7535

GSTDTAP > 气候变化

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	被引频次：193[WOS] [WOS记录] [WOS相关记录]
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).