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Molecular Clouds Observed by the EGRET Gamma-Ray Telescope

Published online by Cambridge University Press:  25 May 2016

Seth. W. Digel ,
Stanley D. Hunter ,
Reshmi Mukherjee ,
Eugéne J. de Geus ,
Isabelle A. Grenier ,
Reas Heithausen ,
Gottfried Kanbach  and
Patrick Thaddeus
Seth. W. Digel
Affiliation:
NASA/Goddard Space Flight Center
Stanley D. Hunter
Affiliation:
NASA/Goddard Space Flight Center
Reshmi Mukherjee
Affiliation:
NASA/Goddard Space Flight Center
Eugéne J. de Geus
Affiliation:
California Institute of Technology
Isabelle A. Grenier
Affiliation:
Centre d'Etudes Saclay
Reas Heithausen
Affiliation:
Universität zu Köln
Gottfried Kanbach
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik
Patrick Thaddeus
Affiliation:
Harvard-Smithsonian Center for Astrophysics

Extract

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EGRET, the high-energy γ-ray telescope on the Compton Gamma-Ray Observatory, has the sensitivity, angular resolution, and background rejection necessary to study diffuse γ-ray emission from the interstellar medium (ISM). High-energy γ rays produced in cosmic-ray (CR) interactions in the ISM can be used to determine the CR density and calibrate the CO line as a tracer of molecular mass. Dominant production mechanisms for γ rays of energies ∼30 MeV–30 GeV are the decay of pions produced in collisions of CR protons with ambient matter and Bremsstrahlung scattering of CR electrons.

Information

Type
Molecular Clouds in the Milky Way
Information
Symposium - International Astronomical Union , Volume 170: CO: Twenty-Five Years of Millimeter-Wave Spectroscopy , 1997 , pp. 22 - 24
Copyright
Copyright © Kluwer 1997 

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