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Deep radio observations of (proto-) planetary nebulae

Published online by Cambridge University Press:  06 October 2025

Teresa Huertas-Roldán Open the ORCID record for Teresa Huertas-Roldán [Opens in a new window] ,
D. Aníbal García-Hernández Open the ORCID record for D. Aníbal García-Hernández [Opens in a new window] ,
José Jairo Díaz-Luis ,
Javier Alcolea Open the ORCID record for Javier Alcolea [Opens in a new window] ,
Daniel Tafoya ,
Ransel Barzaga ,
Arturo Manchado Open the ORCID record for Arturo Manchado [Opens in a new window] ,
Marco A. Gómez-Muñoz Open the ORCID record for Marco A. Gómez-Muñoz [Opens in a new window]  and
Valentín Bujarrabal
Teresa Huertas-Roldán*
Affiliation:
Instituto de Astrofísica de Canarias (IAC), C/ Va Láctea s/n, E-38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Spain
D. Aníbal García-Hernández
Affiliation:
Instituto de Astrofísica de Canarias (IAC), C/ Va Láctea s/n, E-38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Spain
José Jairo Díaz-Luis
Affiliation:
Observatorio Astronómico Nacional (OAN), C/ Alfonso XII 3, E-28014 Madrid, Spain
Javier Alcolea
Affiliation:
Observatorio Astronómico Nacional (OAN), C/ Alfonso XII 3, E-28014 Madrid, Spain
Daniel Tafoya
Affiliation:
Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 439 92 Onsala, Sweden
Ransel Barzaga
Affiliation:
Instituto de Astrofísica de Canarias (IAC), C/ Va Láctea s/n, E-38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Spain
Arturo Manchado
Affiliation:
Consejo Superior de Investigaciones Científicas (CSIC), Spain
Marco A. Gómez-Muñoz
Affiliation:
Instituto de Astrofísica de Canarias (IAC), C/ Va Láctea s/n, E-38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Spain
Valentín Bujarrabal
Affiliation:
Observatorio Astronómico Nacional (OAN), C/ Alfonso XII 3, E-28014 Madrid, Spain
*
Email: thuertas@iac.es
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Abstract

Planetary nebulae (PNe) are known to be extreme radiation environments. However, these extreme conditions do not preclude the presence of different types of molecules. PNe appear as unique laboratories where atoms and simple and complex molecules, including radicals and ions, coexist. Our recent high-resolution radio observations of the C-rich PNe IC 418 and NGC 7027 and proto-PN (pPN) IRAS 22272+5435 have provided us with a precise database of the molecular content of these three objects. In our aim to study the organic molecules in the radio domain, we have found very deep radio recombination lines (RRLs) of neutral and ionized atoms never observed before. These new detected RRLs, along with the molecular content, will give information on the evolutionary state of the sources, as well as the chemical reactions taking place in such complex astrophysical environments.

Keywords

planetary nebulaeastrochemistryISM: moleculesradio astronomy

Information

Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S384: Planetary Nebulae: A Universal Toolbox in the Era of Precision Astrophysics , December 2023 , pp. 233 - 238
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Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of International Astronomical Union

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