Formation of Molecular Hydrogen in the ISM

Details Formation of Molecular Hydrogen in the ISM Formation of Molecular Hydrogen in the ISM

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.5702v&link_type=abstract

American Astronomical Society, AAS Meeting #212, #57.02; Bulletin of the American Astronomical Society, Vol. 40, p.251

Astronomy and Astrophysics

Astronomy

Scientific paper

The ubiquitous presence of molecular hydrogen in very different environments of the interstellar medium (from diffuse to dark clouds and photodissociating regions) poses considerable challenges in explaining its formation. In these environments, it is believed that molecular hydrogen forms on dust grains, but the understanding of the actual processes and rates leading to its formation is unsatisfactory. I'll describe the type of information that can be extracted from carefully designed experiments and how experimentally determined physical parameters are used in theoretical calculations to yield molecular hydrogen formation rates in actual ISM environments. Our most recent investigation on the recombination reaction of hydrogen atoms on amorphous silicates1,2 reveals the importance of understanding and quantifying the basic physical-chemical processes at grain surfaces.
This work was supported by NASA through NASA NNG06GD84G, and NSF AST-0507405 (G.V.), by the Israel Science Foundation and the Adler Foundation for Space Research (Ofer Biham), and by the Italian Ministry for University and Scientific Research through Grant 21043088 (Valerio Pirronello)
1. H.B.Perets, A.Lederhendler, O.Biham, G.Vidali, L. Li, S.Swords, E.Congiu, J. Roser, G.Manico', J.R.Brucato, V.Pirronello: "Molecular Hydrogen Formation on Amorphous Silicates Under Interstellar Conditions" Ap.J. 661, L163 (2007).
2. G.Vidali, V.Pirronello, L.Li, J.Roser, G.Manico', H.Mehl, A.Lederhendler, H.B.Perets, J.R.Brucato, and O.Biham: "Analysis of Molecular Hydrogen Formation on Low Temperature Surfaces in Temperature Programmed Desorption Experiments", J.Phys.Chem. A, 111, 12611 (2007).

Affiliated with

Also associated with

No associations

Rating

Formation of Molecular Hydrogen in the ISM does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Formation of Molecular Hydrogen in the ISM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of Molecular Hydrogen in the ISM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1396595