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Laboratory analogues of hydrocarbonated interstellar nanograins

Published online by Cambridge University Press:  01 February 2008

T. Pino ,
A. T. Cao ,
Y. Carpentier ,
E. Dartois ,
L. d'Hendecourt  and
Ph. Bréchignac
T. Pino
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France email: [email protected]
A. T. Cao
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France email: [email protected]
Y. Carpentier
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France email: [email protected]
E. Dartois
Affiliation:
Institut d'Astrophysique Spatiale, UMR-8617, Université Paris-Sud, 91405 Orsay Cedex, France
L. d'Hendecourt
Affiliation:
Institut d'Astrophysique Spatiale, UMR-8617, Université Paris-Sud, 91405 Orsay Cedex, France
Ph. Bréchignac
Affiliation:
Laboratoire de Photophysique Moléculaire, UPR 3361, Université Paris-Sud, 91405 Orsay Cedex, France email: [email protected]
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Abstract

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Carbonaceous extraterrestrial matter is observed in a wide variety of astrophysical environments. The spectroscopic signatures revealed a large variety of chemical structure illustrating the rich carbon chemistry that occurs in space. In order to produce laboratory analogues of carbonaceous cosmic dust, a new chemical reactor has been built in the Laboratoire de Photophysique Moléculaire. It is a low pressure flat burner providing flames of premixed hydrocarbon / oxygen gas mixtures, closely following the model system used by the combustion community. In such a device the flame is a one-dimensional chemical reactor that offers a broad range of combustion conditions and sampling which allows production of many and various by-products. In the present work, we have studied: i) the infrared transmission spectra of thin film deposit samples whose nature ranges from strongly aromatic to strongly aliphatic materials; ii) the resonant two-photon photoionisation spectra of gas phase PAHs formed in the flame.

Keywords

Astrochemistrymethods: laboratoryISM: dustmolecules
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S251: Organic Matter in Space , February 2008 , pp. 393 - 394
Copyright
Copyright © International Astronomical Union 2008

References

Peeters, E., Hony, S., van Kerckhoven, C., et al. 2002 A&A, 390, 1089Google Scholar
Pino, T., Dartois, E., Cao, A. T., Carpentier, Y., Chamaillé, T., Vasquez, R., Jones, A., d'Hendecourt, L., & Bréchignac, Ph. 2008, A&A, submittedGoogle Scholar