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

Published online by Cambridge University Press:  21 March 2013

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 endoergic 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 cloud mass, may be understood in the framework of the TDR models.

Keywords

astrochemistry — turbulence — magnetic fields — ISM: molecules — ISM: kinematics and dynamics — ISM: general — ISM: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 223 - 226
Copyright
Copyright © International Astronomical Union 2013

References

Anselmet, F., Antonia, R., & Danaila, L., 2001, P&SS, 49, 1177Google Scholar
Cox, D., 2005, ARA&A, 43, 337Google Scholar
Falgarone, E., Verstraete, L., Pineau des Forêts, G., & Hily-Blant, P., 2005, A&A, 433, 997Google Scholar
Falgarone, E., Ossenkopf, V., Gerin, M.et al. 2010, A&A, 518, L118Google Scholar
Falgarone, E., Godard, B., Cernicharo, J.et al. 2010, A&A, 521, L15Google Scholar
Flower, D. & Pineau des Forêts, G., 1998, MNRAS, 297, 1182CrossRefGoogle Scholar
Godard, B., Falgarone, E. & Pineau des Forêts, G., 2009, A&A, 495, 847Google Scholar
Godard, B., Falgarone, E., Gerin, M., et al. 2012, A&A, 540, 87Google Scholar
Hennebelle, P., Banerjee, R., Vazquez-Semadeni, E.et al., 2008 A&A, 486, L43Google Scholar
Hily-Blant, P. & Falgarone, E., 2007, A&A, 469, 173Google 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, 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.A&A, 544, 22Google Scholar
Neufeld, D., Sonnentrucker, P., Phillips, T., et al., 2010, A&A, 518, L108Google Scholar
Snow, T. & McCall, B., 2006, ARA&A, 44, 367Google Scholar