Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering
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2103.09984.pdf
Description
Accepted version
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22.45 MB
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Author(s)
McGuire, Brett A
Loomis, Ryan A
Burkhardt, Andrew M
Lee, Kin Long Kelvin
Shingledecker, Christopher N
Charnley, Steven B
Cooke, Ilsa R
Cordiner, Martin A
Herbst, Eric
Kalenskii, Sergei
Date Issued
2021
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
McGuire, Brett A, Loomis, Ryan A, Burkhardt, Andrew M, Lee, Kin Long Kelvin, Shingledecker, Christopher N et al. 2021. "Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering." Science, 371 (6535).
Version
Author's final manuscript
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1126/SCIENCE.ABB7535
