MOLECULAR CLOUD CHEMISTRY AND THE IMPORTANCE OF DIELECTRONIC RECOMBINATION

Both observational and theoretical studies of molecular cloud chemistry are hindered by many difficulties which are partially circumvented by studying the relative abundances of isomers synthesized from a common set of chemical precursors. Theoretical studies aimed at understanding interstellar abundance ratios for the isomers HCN/HNC, HCO+/HOC+, CH3CN/CH3NC, and C3H2 have been performed.

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Molecular cloud chemistry — the abundant elements in grains

Molecular Clouds in the Milky Way and External Galaxies - Lecture Notes in Physics ◽

10.1007/3-540-50438-9_253 ◽

2008 ◽

pp. 151-165 ◽

Cited By ~ 1

Author(s):

Roger Knacke

Keyword(s):

Molecular Cloud ◽

Cloud Chemistry

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Molecular Cloud Chemistry

Astrophysics and Space Science Library - Millimetre and Submillimetre Astronomy ◽

10.1007/978-94-009-3019-3_4 ◽

1988 ◽

pp. 117-164 ◽

Cited By ~ 11

Author(s):

E. F. van Dishoeck

Keyword(s):

Molecular Cloud ◽

Cloud Chemistry

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Insights on molecular cloud structure

Proceedings of the International Astronomical Union ◽

10.1017/s1743921311000238 ◽

2010 ◽

Vol 6 (S270) ◽

pp. 99-102

Author(s):

João Alves ◽

Marco Lombardi ◽

Charles Lada

Keyword(s):

Molecular Cloud ◽

Molecular Hydrogen ◽

Molecular Clouds ◽

Dust Emission ◽

Tracer Technique ◽

Cloud Chemistry ◽

Molecular Line ◽

Dust Extinction ◽

Dust Grain ◽

Grain Properties

AbstractStars form in the densest regions of clouds of cold molecular hydrogen. Measuring structure in these clouds is far from trivial as 99% of the mass of a molecular cloud is inaccessible to direct observation. Over the last decade we have been developing an alternative, more robust density tracer technique based on dust extinction measurements towards background starlight. The new technique does not suffer from the complications plaguing the more conventional molecular line and dust emission techniques, and when used with these can provide unique views on cloud chemistry and dust grain properties in molecular clouds. In this brief communication we summarize the main results achieved so far using this technique.

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AHERSCHEL/HIFI LEGACY SURVEY OF HF AND H2O IN THE GALAXY: PROBING DIFFUSE MOLECULAR CLOUD CHEMISTRY

The Astrophysical Journal ◽

10.1088/0004-637x/806/1/49 ◽

2015 ◽

Vol 806 (1) ◽

pp. 49 ◽

Cited By ~ 16

Author(s):

P. Sonnentrucker ◽

M. Wolfire ◽

D. A. Neufeld ◽

N. Flagey ◽

M. Gerin ◽

...

Keyword(s):

Molecular Cloud ◽

Cloud Chemistry ◽

The Galaxy

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The Astrochemical Impact of Cosmic Rays in Protoclusters. I. Molecular Cloud Chemistry

The Astrophysical Journal ◽

10.3847/1538-4357/ab20c7 ◽

2019 ◽

Vol 878 (2) ◽

pp. 105 ◽

Cited By ~ 11

Author(s):

Brandt A. L. Gaches ◽

Stella S. R. Offner ◽

Thomas G. Bisbas

Keyword(s):

Cosmic Rays ◽

Molecular Cloud ◽

Cloud Chemistry

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Dielectronic Recombination in the Average-Atom Model

International Astronomical Union Colloquium ◽

10.1017/s0252921100107730 ◽

1988 ◽

Vol 102 ◽

pp. 215

Author(s):

R.M. More ◽

G.B. Zimmerman ◽

Z. Zinamon

Keyword(s):

Detailed Balance ◽

Systematic Errors ◽

Dielectronic Recombination ◽

Rate Equations ◽

Strong Correlations ◽

Dense Plasmas ◽

Atom Model ◽

New Feature ◽

Average Atom Model ◽

Attachment Process

Autoionization and dielectronic attachment are usually omitted from rate equations for the non–LTE average–atom model, causing systematic errors in predicted ionization states and electronic populations for atoms in hot dense plasmas produced by laser irradiation of solid targets. We formulate a method by which dielectronic recombination can be included in average–atom calculations without conflict with the principle of detailed balance. The essential new feature in this extended average atom model is a treatment of strong correlations of electron populations induced by the dielectronic attachment process.

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