H2 formation and excitation in the diffuse interstellar medium

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.

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On the Mechanism of H2 Formation in the Interstellar Medium

Astrochemistry ◽

10.1007/978-94-009-4774-0_28 ◽

1987 ◽

pp. 167-169

Author(s):

Valerio Pirronello

Keyword(s):

Interstellar Medium ◽

H2 Formation

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Modelling H2 formation in the turbulent interstellar medium: solenoidal versus compressive turbulent forcing

Monthly Notices of the Royal Astronomical Society ◽

10.1111/j.1365-2966.2012.20477.x ◽

2012 ◽

Vol 421 (3) ◽

pp. 2531-2542 ◽

Cited By ~ 35

Author(s):

Milica Micic ◽

Simon C. O. Glover ◽

Christoph Federrath ◽

Ralf S. Klessen

Keyword(s):

Interstellar Medium ◽

H2 Formation

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Stochastic on-lattice simulation of H2 formation on interstellar grains

Астрономия и исследование космического пространства: Всероссийская с международным участием научная конференция студентов и молодых ученых, посвященная памяти Полины Евгеньевны Захаровой ◽

10.15826/b978-5-7996-3229-8.10 ◽

2021 ◽

Author(s):

M. G. Medvedev ◽

◽

A. B. Ostrovskii ◽

A. I. Vasyunin ◽

◽

...

Keyword(s):

Random Walk ◽

Interstellar Medium ◽

Stochastic Model ◽

Molecular Hydrogen ◽

Energy Ratio ◽

Model Parameters ◽

Desorption Energy ◽

Lattice Simulation ◽

Hydrogen Recombination ◽

H2 Formation

We realized stochastic model evaluating efficency of recombination H2 in interstellar medium based on the approach of the continious-time random walk on two-dimentional lattice. This method allows to model inhomogeneous surfaces. We estimate recombination efficiensy as a function of model parameters. The influence of uncertainty of diffusion/desorption energy ratio on molecular hydrogen recombination was considered also.

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