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Molecular richness of the diffuse interstellar medium: a signpost of turbulent dissipation

Published online by Cambridge University Press:  05 March 2015

Edith Falgarone ,
Benjamin Godard ,
Guillaume Pineau des Forêts  and
Maryvonne Gerin
Edith Falgarone
Affiliation:
LERMA/LRA, Ecole Normale Supérieure & Observatoire de Paris, 24 rue Lhomond, 75005 Paris, France email: [email protected]
Benjamin Godard
Affiliation:
LUTh, Observatoire de Paris, 92195 Meudon, France email: [email protected]
Guillaume Pineau des Forêts
Affiliation:
Institut d'Astrophysique Spatiale, 91405 Orsay, France
Maryvonne Gerin
Affiliation:
LERMA/LRA, Ecole Normale Supérieure & Observatoire de Paris, 24 rue Lhomond, 75005 Paris, France email: [email protected]
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Abstract

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The Herschel/HIFI absorption spectroscopy surveys reveal the unexpected molecular richness of the Galactic diffuse ISM, even in gas of very low average H2 molecular fraction. In particular, two hydrides, CH+ and SH+ with highly endoenergetic formation routes have abundances that challenge models of UV-driven chemistry. The intermittent dissipation of turbulence appears as a plausible additional source of energy for the diffuse ISM chemistry. We present recent results of the so-called models of Turbulent Dissipation Regions (TDR). The abundances of many of the molecules observed in the diffuse ISM, including CO that is used as a tracer of the molecular clouds mass, may be understood in the framework of the TDR models.

Keywords

AstrochemistryTurbulenceMagnetic FieldsISM: moleculesISM: kinematics and dynamicsISM: generalISM: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 603 - 605
Copyright
Copyright © International Astronomical Union 2015 

References

Anselmet, F., Antonia, R., & Danaila, L. 2001, P&SS 49, 1177Google Scholar
Cox, D. 2005, ARAA 43, 337Google Scholar
Falgarone, E., Godard, B., Cernicharo, J., et al. 2010a, A&A (Letters) 521, L15Google Scholar
Falgarone, E., Ossenkopf, V., Gerin, M., et al. 2010b, A&A (Letters) 518, L118Google Scholar
Falgarone, E., Verstraete, L., Pineau des Forêts, G., & Hily-Blant, P. 2005, A&A 433, 997Google Scholar
Godard, B., Falgarone, E., Gerin, M., et al. 2012, A&A 540, 87Google Scholar
Godard, B., Falgarone, E. & Pineau des Forêts, G. 2009, A&A 495, 847Google Scholar
Hennebelle, P., Banerjee, R., Vazquez-Semadeni, E., et al. 2008, A&A (Letters) 486, L43Google Scholar
Ingalls, J., Bania, T., Boulanger, F., et al. 2011, ApJ 743, 174CrossRefGoogle Scholar
Kainulainen, J., Beuther, H., Henning, T., & Plume, R. 2009, A&A (Letters) 508, L35Google Scholar
Le Petit, F., Nehmé, C., Le Bourlot, J., & Roueff, E. 2006, ApJS 164, 506Google Scholar
Lesaffre, P., Pineau des Forêts, G., Godard, B., et al. 2012, A&A in pressGoogle Scholar
Levrier, F., Le Petit, F., Hennebelle, P., et al. 2012, A&A 544, 22Google Scholar
Neufeld, D., Sonnentrucker, P., Phillips, T., et al. 2010, A&A (Letters) 518, L108Google Scholar
Snow, T. & McCall, B. 2006, ARAA 44, 367CrossRefGoogle Scholar