molecules:ism:ch3-plus [CDMS classic documentation]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
===== On the Detection of Methylium in Space =====

O. Berné, M.-A. Martin-Drumel, I. Schroetter, J. R. Goicoechea, U. Jacovella, B. Gans, E. Dartois, L. H. Coudert, E. Bergin, F. Alarcon, J. Cami, E. Roueff, J. H. Black, O. Asvany, E. Habart, E. Peeters, A. Canin, B. Trahin, C. Joblin, S. Schlemmer, S. Thorwirth, J. Cernicharo, M. Gerin, A. Tielens, M. Zannese, A. Abergel, J. Bernard-Salas, C. Boersma, E. Bron, R. Chown, S. Cuadrado, D. Dicken, M. Elyajouri, A. Fuente, K. D. Gordon, L. Issa, O. Kannavou, B. Khan, O. Lacinbala, D. Languignon, R. Le Gal, A. Maragkoudakis, R Meshaka, Y. Okada, T. Onaka, S. Pasquini, M. W. Pound, M. Robberto, M. Röllig, B. Schefter, T. Schirmer, A. Sidhu, B. Tabone, D. van de Putte, S. Vicente, and M. G. Wolfire\\
observed the\\
**[[https://doi.org/10.1038/s41586-023-06307-x|Formation of the Methyl Cation by Photochemistry in a Protoplanetary Disk]]**\\
//Nature// **621**, 56–59 (2023).\\
The cation was detected with the James Webb Space Telescope toward the protoplanetary disc d203-506 in the Orion Bar, which, in turn, is part of the Orion Nebula. The molecule was identified by its heavily mutually perturbed //v//<sub>2</sub> and //v//<sub>4</sub> bands near 1400 cm<sup>−1</sup> or ~7.2 //µ//m. The inferred rotational temperature is nearly 1000 K. Accurate laboratory data are not yet available for these two bands. The estimated spectroscopic parameters reproduce the spectrum reasonably well. Better parameters should be availbale soon.\\
\\

A much better modeling of the observed spectrum was achieved later by\\
P. B. Changala, N. L. Chen, H. L. Le, B. Gans, K. Steenbakkers, T. Salomon, L. Bonah, I. Schroetter, A. Canin, M.-A. Martin-Drumel, U. Jacovella, E. Dartois, S. Boyé-Péronne, C. Alcaraz, O. Asvany, S. Brünken, S. Thorwirth, S. Schlemmer, J. R. Goicoechea, G. Rouillé, A. Sidhu, R. Chown, D. Van De Putte, B. Trahin, F. Alarcón, O. Berné, E. Habart, and E. Peeters\\
**[[https://doi.org/10.1051/0004-6361/202347765|Astronomical CH3+ Rovibrational Assignments — A Combined Theoretical and Experimental Study Validating Observational Findings in the d203-506 UV-irradiated Protoplanetary Disk]]**\\
//Astron. Astrophys.// **680**, Art. No. A19 (2023).\\
Initial spectroscopic parameters were derived from a high-level quantum chemical calculation. The parameters were adjusted through a line-by-line fit of the observational spectrum in spite of the limitations of the latter.\\
\\

T. Henning, I. Kamp, M. Samland, A. M. Arabhavi, J. Kanwar, E. F. van Dishoeck, M. Güdel, P.-O. Lagage, C. Waelkens, A. Abergel, O. Absil, D. Barrado, A. Boccaletti, J. Bouwman, A. Caratti o Garatti, V. Geers, A. M. Glauser, F. Lahuis, M. Mueller, C. Nehmé, G. Olofsson, E. Pantin, T. P. Ray, S. Scheithauer, B. Vandenbussche, L. B. F. M. Waters, G. Wright, I. Argyriou, V. Christiaens, R. Franceschi, D. Gasman, S. L. Grant, R. Guadarrama, H. Jang, M. Morales-Calderón, N. Pawellek, G. Perotti, D. Rodgers-Lee, J. Schreiber, K. Schwarz, B. Tabone, M. Temmink, M. Vlasblom, L. Colina, T. R. Greve, and G. Östlin\\
presented an account on\\
**[[https://doi.org/10.1088/1538-3873/ad3455|MINDS: The JWST MIRI Mid-INfrared Disk Survey]]**\\
//Publ. Astron. Soc. Pac.// **136**, Art. No. 054302 (2024).\\
The methylium cation was detected in the disk of the T Tauri star TW Hya.\\
\\

M. Zannese, B. Tabone, E. Habart, E. Dartois, J. R. Goicoechea, L. Coudert, B. Gans, M.-A. Martin-Drumel, U. Jacovella, A. Faure, B. Godard, A. G. G. M. Tielens, R. Le Gal, J. H. Black, S. Vicente, O. Berné, E. Peeters, D. Van De Putte, R. Chown, A. Sidhu, I. Schroetter, A. Canin, and O. Kannavou\\
found the cation to be more wide-spread in the Orion Bar in their work\\
**[[https://doi.org/10.1051/0004-6361/202453441|PDRs4All — XI. Detection of infrared CH+ and CH3+ rovibrational emission in the Orion Bar and disk d203-506: Evidence of chemical pumping]]**\\
//Astron. Astrophys.// **696**, Art. No. A99 (2025).\\
\\

C. Bhatt, J. Cami, E. Peeters, N. Clark, P. Moraga Baez, K. Volk, G. C. Sloan, J. H. Kastner, H. L. Dinerstein, M. Matsuura, B. Balick, K. E. Kraemer, K. Justtanont, O. Jones, R. Sahai, I. Aleman, M. J. Barlow, J. Bernard-Salas, J. Blommaert, N. Hirano, P. Kavanagh, F. Kemper, E. Lagadec, J. M. Laming, F. Molster, H. Monteiro, A. M. S. Richards, N. C. Sterling, M. Torki, P. A. M. van Hoof, J. R. Walsh, L. B. F. M. Waters, R. Wesson, F. Wilson, N. J. Wright, and A. A. Zijlstra\\
reported more recently on\\
**[[https://doi.org/10.3847/1538-4357/ae1020|Detection of CH3+ in the O-rich Planetary Nebula NGC 6302]]**\\
//Astrophys. J.// **995**, Art. No. 67 (2025).\\
\\

----

Contributor(s): H. S. P. Müller; 09, 2023; 12, 2025

----