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GTC/CanariCam mid-IR imaging of the fullerene-rich planetary nebula IC 418

Published online by Cambridge University Press:  08 August 2017

J. J. Díaz-Luis ,
D. A. García-Hernández ,
A. Manchado ,
P. García-Lario ,
E. Villaver  and
G. García-Segura
J. J. Díaz-Luis
Affiliation:
Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E−38205 La Laguna, Spain email: jdiaz@iac.es Departamento de Astrofísica, Universidad de La Laguna (ULL), E−38206 La Laguna, Spain
D. A. García-Hernández
Affiliation:
Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E−38205 La Laguna, Spain email: jdiaz@iac.es Departamento de Astrofísica, Universidad de La Laguna (ULL), E−38206 La Laguna, Spain
A. Manchado
Affiliation:
Instituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E−38205 La Laguna, Spain email: jdiaz@iac.es Departamento de Astrofísica, Universidad de La Laguna (ULL), E−38206 La Laguna, Spain Consejo Superior de Investigaciones Científicas, Madrid, Spain
P. García-Lario
Affiliation:
Herschel Science Centre, ESAC-ESA, E−28691 Villanueva de la Cañada, Madrid, Spain
E. Villaver
Affiliation:
UAM, Departamento de Física Teórica C-XI, E−28049 Madrid, Spain
G. García-Segura
Affiliation:
Instituto de Astronomía, UNAM, 22860 Ensenada, México
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Abstract

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The formation process(es) of fullerenes in space is still uncertain and several mechanisms have been proposed in the literature. In particular, the most accepted idea to explain the simultaneous presence of fullerenes and PAH-like emission in the H-rich circumstellar envelopes of PNe is that these molecular species may be formed from the photochemical processing of a carbonaceous compound with a mixture of aromatic and aliphatic structures, which should be a major constituent of their circumstellar envelopes. Here we present seeing-limited narrow-band mid-IR GTC/CanariCam images of the fullerene-containing PN IC 418. The narrow-band images cover the 9−13, 11.3, and 17.4 μm emission features (and their adjacent continua) in this extended PN. We study the relative sub-arcsecond spatial distribution of the nebula in these filters with the intention of getting some clues about the formation process of fullerenes in H-rich circumstellar environments.

Keywords

Astrochemistrymolecular processesstars: evolutionplanetary nebulae: individual (IC 418)AGB and post-AGBdust
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S323: Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution , October 2016 , pp. 150 - 154
Copyright
Copyright © International Astronomical Union 2017 

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