scholarly journals Effective rate coefficients for molecular hydrogen formation in diffuse interstellar clouds

2006 ◽  
Vol 458 (2) ◽  
pp. 497-505 ◽  
Author(s):  
Q. Chang ◽  
H. M. Cuppen ◽  
E. Herbst
Keyword(s):  
Molecular Hydrogen ◽  
Effective Rate ◽  
Rate Coefficients ◽  
Hydrogen Formation ◽  
Interstellar Clouds

scholarly journals On the Mechanism of H2 Formation in the Interstellar Medium

1987 ◽  
Vol 120 ◽  
pp. 167-169
Author(s):  
Valerio Pirronello
Keyword(s):  
Interstellar Medium ◽  
Molecular Hydrogen ◽  
Formation Rate ◽  
Cosmic Ray ◽  
Interstellar Clouds ◽  
H2 Formation ◽  
Reduced Mobility

The problem of the formation of molecular hydrogen in interstellar clouds is revisited. the role played by cosmic ray bombardment under certain circumstances is considered mainly in the light of the low formation rate of H2 on grains due to the reduced mobility of adsorbed H atoms on their amorphous surfaces at interstellar temperatures.

scholarly journals EFFECTS OF VARYING THE THREE-BODY MOLECULAR HYDROGEN FORMATION RATE IN PRIMORDIAL STAR FORMATION

2010 ◽  
Vol 726 (1) ◽  
pp. 55 ◽  
Author(s):  
Matthew J. Turk ◽  
Paul Clark ◽  
S. C. O. Glover ◽  
T. H. Greif ◽  
Tom Abel ◽  
...  
Keyword(s):  
Star Formation ◽  
Molecular Hydrogen ◽  
Formation Rate ◽  
Hydrogen Formation ◽  
Three Body

scholarly journals Molecular Hydrogen Formation by Escherichia Coli Hydrogenase 3 during Fermentation of Glucose at Slightly Acidic pH

2011 ◽  
Vol 100 (3) ◽  
pp. 488a
Author(s):  
Anna Poladyan ◽  
Anna Poghosyan ◽  
Karen Trchounian ◽  
Armen Trchounian
Keyword(s):  
Escherichia Coli ◽  
Molecular Hydrogen ◽  
Acidic Ph ◽  
Hydrogen Formation ◽  
Hydrogenase 3

scholarly journals Obtaining effective rate coefficients to describe the decomposition kinetics of the corannulene oxyradical at high temperatures

2017 ◽  
Vol 19 (18) ◽  
pp. 11064-11074 ◽  
Author(s):  
Hongmiao Wang ◽  
Xiaoqing You ◽  
Mark A. Blitz ◽  
Michael J. Pilling ◽  
Struan H. Robertson
Keyword(s):  
High Temperature ◽  
Master Equation ◽  
High Temperatures ◽  
Effective Rate ◽  
Decomposition Kinetics ◽  
Rate Coefficients ◽  
High Temperature Kinetics ◽  
Kinetics Of

This work analyzes the effect of overlapping eigenvalues on the high-temperature kinetics of a large oxyradical based on master equation solutions.

scholarly journals Cosmic Ray Induced Photodestruction of Interstellar Molecules

1989 ◽  
Vol 120 ◽  
pp. 32-37
Author(s):  
R. Gredel ◽  
S. Lepp ◽  
A. Dalgarno ◽  
E. Herbst
Keyword(s):  
Molecular Hydrogen ◽  
Cosmic Ray ◽  
Impact Excitation ◽  
Interstellar Molecules ◽  
Secondary Electrons ◽  
Interstellar Clouds ◽  
Wide Range ◽  
Ultraviolet Photons ◽  
The Impact ◽  
Equilibrium Chemical

AbstractUltraviolet photons are created in the interior of dense interstellar clouds by the impact excitation of molecular hydrogen by secondary electrons generated by cosmic ray ionization. The resulting photodissociation and photoionization rates of a wide range of interstellar molecules are calculated. The effects on the equilibrium chemical composition of dense clouds are briefly discussed.

scholarly journals Molecular hydrogen formation on interstellar PAHs through Eley-Rideal abstraction reactions

2018 ◽  
Author(s):  
Nolan Foley ◽  
S Cazaux ◽  
D Egorov ◽  
L M P V Boschman ◽  
R Hoekstra ◽  
...  
Keyword(s):  
Molecular Hydrogen ◽  
Hydrogen Formation

scholarly journals New Constraints on Diffuse Interstellar Cloud Models. The Model of the ζ Ophiuchi Cloud Revisited

1987 ◽  
Vol 120 ◽  
pp. 227-233
Author(s):  
Y. P. Viala ◽  
H. Abgrall ◽  
E. Roueff
Keyword(s):  
Molecular Species ◽  
Transfer Equation ◽  
Molecular Hydrogen ◽  
Reaction Rate ◽  
Radiative Transfer Equation ◽  
Interstellar Cloud ◽  
Rate Coefficients ◽  
Cloud Models ◽  
Parallel Geometry ◽  
Simple Molecules

Using most recent observational data as well as new experimental and theoretical determinations of various reaction rate coefficients, we present a model of the ζ θphiuchus cloud. the radiative transfer equation is solved in a plane parallel geometry taking into account absorptions by both the gas and by dust. A part certain atypical molecules (CH+, CN) and neutral iron, we are able to reproduce the observed column densities of neutral atoms, and molecular species, including the rotational populations of molecular Hydrogen with a two shell model. the concentrations of other simple molecules are predicted.

Sign in / Sign up

Export Citation Format

Share Document