Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-02T22:14:09.166Z Has data issue: false hasContentIssue false
  • English
  • Français

The survival of PAHs and (hydro)carbon nanoparticles in H II regions

Published online by Cambridge University Press:  18 July 2017

Elisabetta R. Micelotta ,
Marco Bocchio ,
Aurélie Rémy-Ruyer ,
Melanie Köhler ,
Nathalie Ysard  and
Anthony P. Jones
Elisabetta R. Micelotta
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected]
Marco Bocchio
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected] School of Physics and Astronomy, Queen Mary University of London, London, UK
Aurélie Rémy-Ruyer
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected]
Melanie Köhler
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected] INAF – Osservatorio Astrofisico di Arcetri, Firenze, Italy
Nathalie Ysard
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected]
Anthony P. Jones
Affiliation:
Institut d'Astrophysique Spatiale, Université Paris-Sud and CNRS, Orsay, France email: [email protected], [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Observations show that emission from the Unidentified Infrared (UIR) bands is strongly suppressed in H II regions. UIR bands are generally attributed to vibrational relaxation of FUV - excited Polycyclic Aromatic Hydrocarbon (PAH) molecules or hydrocarbon nanoparticles containing aromatic domains. If the strongly reduced UIR emission in H II regions is due to the suppression of the carriers, an efficient destruction mechanism is required to explain observations. The aim of this work is to clarify whether UV processing of PAHs and nanoparticles is indeed responsible for the observed lack of infrared emission. We present here our first results on the physical response to photo-processing of the proposed UIR-bands carriers.

Keywords

molecular processesH II regionsISM: lines and bandsdustextinction
Type
Addendum
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29A: Astronomy in Focus , August 2015 , E23
Copyright
Copyright © International Astronomical Union 2017 

References

Verstraete, L. & Léger, A., 1992, A&A, 266, 513 Google Scholar
Li, A. & Draine, B., 2001, ApJ, 554, 778 Google Scholar
Jones, A. P. 2012c, A&A, 542, A98+Google Scholar
Micelotta, E. R. et al. 2010b, A&A, 510, A37+Google Scholar
Micelotta, E. R. et al. 2015, in preparation Google Scholar