Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/332865
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | The magnesium paradigm in IRC +10216: Discovery of MgC4H+, MgC3N+, MgC6H+, and MgC5N+⋆ |
Autor: | Cernicharo, José CSIC ORCID ; Cabezas, Carlos CSIC ORCID; Pardo Carrión, Juan Ramón CSIC ORCID; Agúndez, Marcelino CSIC ORCID; Roncero, Octavio CSIC ORCID ; Tercero, Belén CSIC ORCID; Marcelino, Nuria CSIC ORCID; Guélin, M.; Endo, Y.; Vicente, P. de | Palabras clave: | Astrochemistry ISM: individual objects: IRC + 10216 ISM: individual objects: TMC-1 ISM: molecules Line: identification Molecular data |
Fecha de publicación: | 11-abr-2023 | Editor: | EDP Sciences | Citación: | Astronomy & Astrophysics 672: L13 (2023) | Resumen: | We found four series of harmonically related lines in IRC\,+10216 with the Yebes\,40m and IRAM\,30m telescopes. The first series corresponds to a molecule with a rotational constant, $B$, of 1448.5994$\pm$0.0013 MHz and a distortion constant, $D$, of 63.45$\pm$1.15 Hz and covers upper quantum numbers from $J_u$=11 up to 33 (B1449). The second series is fitted with $B$=1446.9380$\pm$0.0098 MHz and $D$=91$\pm$23 Hz and covers upper quantum numbers from $J_u$=11 up to 17 (B1447). The third series is fitted with $B$=598.7495$\pm$0.0011 MHz and D=6.13$\pm$0.43 Hz and covers quantum numbers from $J_u$=26 up to 41 (B599). Finally, the frequencies of the last series of lines can be reproduced with $B$=594.3176$\pm$0.0026 MHz and $D$=4.92$\pm$1.16 Hz (B594). The large values of $D$ point toward four metal-bearing carriers. After exploring all plausible candidates containing Na, Al, Mg, and other metals, our ab initio calculations indicate that the cations MgC$_4$H$^+$, MgC$_3$N$^+$, MgC$_6$H$^+$, and MgC$_5$N$^+$ must be the carriers of B1449, B1447, B599, and B594, respectively. These cations could be formed by the radiative association of Mg$^+$ with C$_4$H, C$_3$N, C$_6$H, and C$_5$N, respectively. We calculated the radiative association rate coefficient of Mg$^+$ with C$_4$H, C$_3$N, C$_6$H, and C$_5$N and incorporated them in our chemical model. The results confirm that the Mg-bearing cations can be formed through these radiative association reactions in the outer layers of IRC\,+10216. This is the first time that cationic metal-bearing species have been found in space. These results provide a new paradigm on the reactivity of ionized metals with abundant radicals and open the door for further characterization of similar species in metal-rich astrophysical environments. | Descripción: | 13 pags., 9 figs., 10 tabs. -- Letter to editor | Versión del editor: | https://doi.org/10.1051/0004-6361/202346467 | URI: | http://hdl.handle.net/10261/332865 | DOI: | 10.1051/0004-6361/202346467 | ISSN: | 0004-6361 |
Aparece en las colecciones: | (CFMAC-IFF) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
A&A_CernicharoJ_et_al_2023.pdf | Artículo principal | 1,17 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
13
checked on 26-abr-2024
WEB OF SCIENCETM
Citations
6
checked on 23-feb-2024
Page view(s)
39
checked on 26-abr-2024
Download(s)
18
checked on 26-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons