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Space Science Reviews

, Volume 36, Issue 1, pp 41–49 | Cite as

The relevance of molecular observations to gamma-ray astronomy

  • T. W. Hartquist
Article

Abstract

The interaction of cosmic rays with interstellar clouds may produce some of the observed gamma-ray sources. The use of molecular observations to estimate the cloud masses, which are used to derive cosmic-ray fluxes, is reviewed. Molecular diagnostics of high cosmic-ray ionization rates are discussed, and a detailed application of those diagnostics is summarised and presented as evidence that second-order Fermi acceleration is important in old supernova remnants and can produce cosmic rays of too low energy to induce gamma-ray emission.

Keywords

Ionization Rate Molecular Diagnostics Supernova Remnant Interstellar Cloud Fermi Acceleration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Co 1983

Authors and Affiliations

  • T. W. Hartquist
    • 1
  1. 1.Department of Physics and AstronomyUniversity College LondonLondonEngland

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