H2 formation on interstellar dust grains: The viewpoints of theory, experiments, models and observations

Q2 Physics and Astronomy

Molecular Astrophysics Pub Date : 2017-12-01 DOI:10.1016/j.molap.2017.11.001

Valentine Wakelam , Emeric Bron , Stephanie Cazaux , Francois Dulieu , Cécile Gry , Pierre Guillard , Emilie Habart , Liv Hornekær , Sabine Morisset , Gunnar Nyman , Valerio Pirronello , Stephen D. Price , Valeska Valdivia , Gianfranco Vidali , Naoki Watanabe

引用次数: 120

Abstract

Molecular hydrogen is the most abundant molecule in the universe. It is the first one to form and survive photo-dissociation in tenuous environments. Its formation involves catalytic reactions on the surface of interstellar grains. The micro-physics of the formation process has been investigated intensively in the last 20 years, in parallel of new astrophysical observational and modeling progresses. In the perspectives of the probable revolution brought by the future satellite JWST, this article has been written to present what we think we know about the H₂ formation in a variety of interstellar environments.

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星际尘埃颗粒上H2的形成:理论、实验、模型和观测的观点

氢分子是宇宙中最丰富的分子。它是第一个在脆弱的环境中形成和存活光解离的。它的形成涉及到星际颗粒表面的催化反应。近20年来，随着新的天体物理观测和建模的进展，形成过程的微观物理学得到了深入的研究。从未来卫星JWST可能带来的革命的角度来看，这篇文章是为了展示我们认为我们对各种星际环境中H2形成的了解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molecular Astrophysics ASTRONOMY & ASTROPHYSICS-

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期刊介绍： Molecular Astrophysics is a peer-reviewed journal containing full research articles, selected review articles, and thematic issues. Molecular Astrophysics is a new journal where researchers working in planetary and exoplanetary science, astrochemistry, astrobiology, spectroscopy, physical chemistry and chemical physics can meet and exchange their ideas. Understanding the origin and evolution of interstellar and circumstellar molecules is key to understanding the Universe around us and our place in it and has become a fundamental goal of modern astrophysics. Molecular Astrophysics aims to provide a platform for scientists studying the chemical processes that form and dissociate molecules, and control chemical abundances in the universe, particularly in Solar System objects including planets, moons, and comets, in the atmospheres of exoplanets, as well as in regions of star and planet formation in the interstellar medium of galaxies. Observational studies of the molecular universe are driven by a range of new space missions and large-scale scale observatories opening up. With the Spitzer Space Telescope, the Herschel Space Observatory, the Atacama Large Millimeter/submillimeter Array (ALMA), NASA''s Kepler mission, the Rosetta mission, and more major future facilities such as NASA''s James Webb Space Telescope and various missions to Mars, the journal taps into the expected new insights and the need to bring the various communities together on one platform. The journal aims to cover observational, laboratory as well as computational results in the galactic, extragalactic and intergalactic areas of our universe.