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Gamma rays from atomic and molecular gas in the large complex of clouds in Orion and MonocerosA comparison of COS-B gamma-ray observations of the large complex of interstellar clouds in Orion and Monoceros with the Columbia CO and Berkeley H I surveys of this region reveals a good correlation between gamma-ray emission and total gas distribution. The observed gamma-ray emission is explainable in terms of interactions of cosmic rays that are uniformly distributed in this region with the interstellar gas. The correlation is used as the basis of a calibration of the ratio between H2 column density and the integrated CO line intensity; the value of (2.6 + or - 1.2) X 10 to the 20th mol/sq cm K km s thereby obtained is consistent with the value derived from a similar analysis for the inner galaxy.
Document ID
19850031235
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bloemen, J. B. G. M.
(Leiden, Rijksuniversiteit, Sterrewacht Leiden, Netherlands)
Caraveo, P. A.
(CNR Istituto di Fisica Cosmica, Milan, Italy)
Hermsen, W.
(Leiden, Rijksuniversiteit, Sterrewacht Leiden, Netherlands)
Lebrun, F.
(Commissariat a l'Energie Atomique, Centre d'Etudes Nucleaires de Saclay, Gif-sur-Yvette Essonne, France)
Maddalena, R. J.
(Columbia University New York, NY, United States)
Strong, A. W.
(Max-Planck-Institut fuer Physik und Astrophysik Garching, Germany)
Thaddeus, P.
(NASA Goddard Institute for Space Studies; Columbia University New York, NY, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Astronomy and Astrophysics
Volume: 139
Issue: 1, Oc
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
85A13386
Distribution Limits
Public
Copyright
Other

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