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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.

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 

References

Bloemen, J. B. G. M., Caraveo, P. A., Hermsen, W., Lebrun, F., Maddalena, R. J., Strong, A. W., Thaddeus, P. 1984, A&A, 139, 37 Google Scholar
Bronfman, L., Cohen, R. S., Alvarez, H., May, J., Thaddeus, P. 1988, ApJ , 324, 248 CrossRefGoogle Scholar
de Geus, E. J., Burton, W. B. 1991, A&A , 246, 559 Google Scholar
Digel, S., Bally, J., Thaddeus, P. 1990, ApJ , 357, L29 Google Scholar
Digel, S. W., Hunter, S. D., Mukherjee, R. 1995a, ApJ , 441, 270 CrossRefGoogle Scholar
Digel, S. W., Grenier, I. A., Heithausen, A., Hunter, S. D., Thaddeus, P. 1995b, ApJ , submitted Google Scholar
Grenier, I. A., Lebrun, F. 1990, ApJ , 360, 129 Google Scholar
Hunter, S. D., Digel, S. W., de Geus, E. J., Kanbach, G. 1994, ApJ , 436,216 Google Scholar
Lebrun, F., Huang, Y. 1984, ApJ , 281, 634 Google Scholar
Maddalena, R. J., Morris, M., Moscowitz, J., Thaddeus, P. 1986, ApJ , 303, 375 CrossRefGoogle Scholar
Mead, K. N., Kutner, M. L. 1988, ApJ , 330, 399 CrossRefGoogle Scholar
Sodroski, T. J. 1991, ApJ , 366, 95 Google Scholar
Strong, A. W., et al. 1988, A&A , 207, 1 Google Scholar