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Literature DB >> 33737489

Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering.

Ryan A Loomis¹, Andrew M Burkhardt², Brett A McGuire^3,1,2, Kin Long Kelvin Lee^4,2, Christopher N Shingledecker^5,6,7, Steven B Charnley⁸, Ilsa R Cooke⁹, Martin A Cordiner^8,10, Eric Herbst^11,12, Sergei Kalenskii¹³, Mark A Siebert¹², Eric R Willis¹¹, Ci Xue¹¹, Anthony J Remijan¹, Michael C McCarthy².

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.

Entities: Chemical Gene

Year: 2021 PMID： 33737489 DOI： 10.1126/science.abb7535

Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728

Keyword Cloud
Cited

12 in total

1. The emergence of interstellar molecular complexity explained by interacting networks.

Authors: Miguel García-Sánchez; Izaskun Jiménez-Serra; Fernando Puente-Sánchez; Jacobo Aguirre
Journal: Proc Natl Acad Sci U S A Date: 2022-07-22 Impact factor: 12.779

2. Polycyclic aromatic hydrocarbon growth in a benzene discharge explored by IR-UV action spectroscopy.

Authors: Alexander K Lemmens; Daniël B Rap; Sandra Brünken; Wybren Jan Buma; Anouk M Rijs
Journal: Phys Chem Chem Phys Date: 2022-06-22 Impact factor: 3.945

3. Identification and characterization of a new ensemble of cometary organic molecules.

Authors: N Hänni; K Altwegg; M Combi; S A Fuselier; J De Keyser; M Rubin; S F Wampfler
Journal: Nat Commun Date: 2022-06-25 Impact factor: 17.694

4. Unsaturated Dinitriles Formation Routes in Extraterrestrial Environments: A Combined Experimental and Theoretical Investigation of the Reaction between Cyano Radicals and Cyanoethene (C₂H₃CN).

Authors: Demian Marchione; Luca Mancini; Pengxiao Liang; Gianmarco Vanuzzo; Fernando Pirani; Dimitrios Skouteris; Marzio Rosi; Piergiorgio Casavecchia; Nadia Balucani
Journal: J Phys Chem A Date: 2022-05-31 Impact factor: 2.944

Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering.

1. The emergence of interstellar molecular complexity explained by interacting networks.

2. Polycyclic aromatic hydrocarbon growth in a benzene discharge explored by IR-UV action spectroscopy.

3. Identification and characterization of a new ensemble of cometary organic molecules.

4. Unsaturated Dinitriles Formation Routes in Extraterrestrial Environments: A Combined Experimental and Theoretical Investigation of the Reaction between Cyano Radicals and Cyanoethene (C₂H₃CN).

5. Pure hydrocarbon cycles in TMC-1: Discovery of ethynyl cyclopropenylidene, cyclopentadiene and indene.

Review 6. The mystery of unidentified infrared emission bands.

7. Electronic Spectroscopy of Monocyclic Carbon Ring Cations for Astrochemical Consideration.

8. Spectroscopic Detection of Cyano-Cyclopentadiene Ions as Dissociation Products upon Ionization of Aniline.

9. Precise equilibrium structure of thiazole (c-C₃H₃NS) from twenty-four isotopologues.

Review 10. Contemporary Research Progress on the Detection of Polycyclic Aromatic Hydrocarbons.