Molecular hydrogen

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Molecular hydrogen

Book Chapter (2005)

Author(s)

Emilie Habart (INAF-Osservatorio Astrofisico di Arcetri)

Malcolm Walmsley (INAF-Osservatorio Astrofisico di Arcetri)

Laurent Verstraete (Université Paris-Saclay)

Stephanie Cazaux (INAF-Osservatorio Astrofisico di Arcetri)

Roberto Maiolino (INAF-Osservatorio Astrofisico di Arcetri)

Pierre Cox (Université Paris-Saclay)

Francois Boulanger (Université Paris-Saclay)

Guillaume Pineau Des Forêts (Université Paris-Saclay)

Affiliation

External organisation

Star formation Infrared: galaxies ISM: molecules ISM: clouds Circumstellar matter Molecular processes Infrared: spectroscopy Molecular hydrogen

DOI related publication

https://doi.org/10.1007/1-4020-3844-5_3 Final published version

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https://resolver.tudelft.nl/uuid:5aff30e7-3cc7-48b2-ab1f-1ccef94a5c09

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Publication Year

2005

Language

English

Affiliation

External organisation

Pages (from-to)

71-91

Publisher

Springer

ISBN (print)

['1402038437', '9781402038433']

Downloads counter

259

Abstract

Observations of H₂ line emission in galactic and extragalactic environments obtained with the Infrared Space Observatory (ISO) are reviewed. The diagnostic capability of H₂ observations is illustrated. We discuss what one has learned about such diverse astrophysical sources as photon-dominated regions, shocks, young stellar objects, planetary nebulae and starburst galaxies from ISO observations of H₂ emission. In this context, we emphasise use of measured H₂ line intensities to infer important physical quantities such as the gas temperature, gas density and radiation field and we discuss the different possible excitation mechanisms of H₂. We also briefly consider future prospects for observation of H₂ from space and from the ground.