Formation of molecular hydrogen on analogues of interstellar dust grains: experiments and modelling
Astrophysics, abstract
astro-ph/0504543
From: Hagai B. Perets [view email]
Date: Mon, 25 Apr 2005 15:26:44 GMT (149kb)
Formation of molecular hydrogen on analogues of interstellar dust
grains: experiments and modelling
Authors:
Gianfranco Vidali,
Joe Roser,
Giulio Manico,
Valerio Pirronello,
Hagai B. Perets,
Ofer Biham
Comments: 23 pages, 7 figs. Published in the J. Phys.: Conf. Ser
Journal-ref: 2005 J. Phys.: Conf. Ser. 6 36-58
DOI: 10.1088/1742-6596/6/1/003
Molecular hydrogen has an important role in the early stages of star
formation as well as in the production of many other molecules that have been
detected in the interstellar medium. In this review we show that it is now
possible to study the formation of molecular hydrogen in simulated
astrophysical environments. Since the formation of molecular hydrogen is
believed to take place on dust grains, we show that surface science techniques
such as thermal desorption and time-of-flight can be used to measure the
recombination efficiency, the kinetics of reaction and the dynamics of
desorption. The analysis of the experimental results using rate equations gives
useful insight on the mechanisms of reaction and yields values of parameters
that are used in theoretical models of interstellar cloud chemistry.
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