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Formation of the Methyl Cation by Photochemistry in a Protoplanetary Disk

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arxiv 2401.03296 v1 pith:TZKAKZDK submitted 2024-01-06 astro-ph.GA physics.chem-ph

Olivier Berné , Marie-Aline Martin-Drumel , Ilane Schroetter , Javier R. Goicoechea , Ugo Jacovella , Bérenger Gans , Emmanuel Dartois , Laurent Coudert
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Edwin Bergin Felipe Alarcon Jan Cami Evelyne Roueff John H. Black Oskar Asvany Emilie Habart Els Peeters Amelie Canin Boris Trahin Christine Joblin Stephan Schlemmer Sven Thorwirth Jose Cernicharo Maryvonne Gerin Alexander Tielens Marion Zannese Alain Abergel Jeronimo Bernard-Salas Christiaan Boersma Emeric Bron Ryan Chown Sara Cuadrado Daniel Dicken Meriem Elyajouri Asunción Fuente Karl D. Gordon Lina Issa Olga Kannavou Baria Khan Ozan Lacinbala David Languignon Romane Le Gal Alexandros Maragkoudakis Raphael Meshaka Yoko Okada Takashi Onaka Sofia Pasquini Marc W. Pound Massimo Robberto Markus Röllig Bethany Schefter Thiébaut Schirmer Ameek Sidhu Benoit Tabone Dries Van De Putte Sílvia Vicente Mark G. Wolfire
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classification astro-ph.GAphysics.chem-ph
keywords beencationchemistrydiskmethylorganicprotoplanetaryactivated
verification ladder T0 review T1 audit T2 compute T3 formal
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Forty years ago it was proposed that gas phase organic chemistry in the interstellar medium was initiated by the methyl cation CH3+, but hitherto it has not been observed outside the Solar System. Alternative routes involving processes on grain surfaces have been invoked. Here we report JWST observations of CH3+ in a protoplanetary disk in the Orion star forming region. We find that gas-phase organic chemistry is activated by UV irradiation.

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