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Formation of water on silicate surfaces under interstellar conditions

Published online by Cambridge University Press:  13 February 2013

H. Chaabouni ,
M. Minissale ,
F. Dulieu ,
E. Congiu ,
M. Accolla ,
S. Baouche  and
J.-L. Lemaire
H. Chaabouni
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr
M. Minissale
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr
F. Dulieu
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr
E. Congiu
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr
M. Accolla
Affiliation:
Dipartimento di Scienze Applicate – Università Parthenope di Napoli Centro Direzionale, Isola C4, 80143 Napoli, Italy
S. Baouche
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr
J.-L. Lemaire
Affiliation:
LERMA, UMR 8112 du CNRS, Observatoire de Paris et Université de Cergy Pontoise, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France;. e-mail: Henda.Chaabouni@obspm.fr

Abstract

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We explore experimentally the formation of water molecules from O2 and D atoms on bare grains composed of amorphous silicates analogous to those in diffuse interstellar clouds. We provide the fractions of D2O and D2O2 molecules formed on the silicate surface held at 10 K from the O2 + D pathway using RAIRS and TPD techniques. For comparison, we also study the formation of water molecules on surfaces covered with amorphous water ice representing the dense clouds.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 58: ECLA - European Conference on Laboratory Astrophysics , 2012 , pp. 361 - 362
Copyright
© The Author(s) 2013

References

Références

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