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Record 1 of 694
Diffuse continuum gamma rays from the Galaxy observed by COMPTEL
Author and Affiliation:
Strong, A. W.(Max-Planck Institut fuer extraterrestrische Physik, Garching, Germany)
Bennett, K.(ESTEC, Noordwijk, Netherlands)
Bloemen, H.(SRON-Leiden, Leiden, Netherlands)
Diehl, R.(Max-Planck Institut fuer extraterrestrische Physik, Garching, Germany)
Hermsen, W.(SRON-Leiden, Leiden, Netherlands)
Morris, D.(University of New Hampshire, Durham, NH, United States)
Schonfelder, V.(Max-Planck Institut fuer extraterrestrische Physik, Garching, Germany)
Stacy, J. G.(University of New Hampshire, Durham, NH, United States)
De Vries, C.(SRON-Leiden, Leiden, Netherlands)
Varendorff, M.(Max-Planck Institut fuer extraterrestrische Physik, Garching, Germany) Show more authors
Abstract: The diffuse Galactic continuum gamma-ray emission has been studied using the full Sky Survey from COMPTEL on the Compton Observatory CGRO. The diffuse emission appears to be visible in the whole 0.75-30 MeV range covered by the instrument, although a considerable contribution from unresolved point sources cannot be excluded. A correlation analysis using HI and CO surveys of the Galaxy is used to derive the Galactic emissivity spectrum, and this is consistent with a smooth continuation to the spectrum at higher energies derived by a similar analysis of COS-B data. The apparent conversion factor from integrated CO temperature to molecular hydrogen column density can also be determined from the correlation analysis. The value obtained is consistent with results from COS-B and other non-gamma-ray methods. Calculations of the emissivity spectrum from bremsstrahlung from a cosmic-ray electron spectrum based on propagation models are compared with the observations.
Publication Date: Dec 01, 1994
Document ID:
19950043576
(Acquired Dec 28, 1995)
Accession Number: 95A75175
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astronomy and Astrophysics (ISSN 0004-6361); 292; 1; p. 82-91
Publisher Information: Germany
Contract/Grant/Task Num: NAS5-26645
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: COMPUTATIONAL ASTROPHYSICS; CONTINUUMS; COSMIC RAYS; EMISSION; GALACTIC HALOS; GALAXIES; GAMMA RAYS; INTERSTELLAR GAS; PLASMA CLOUDS; POINT SOURCES; SPECTRUM ANALYSIS; ASTRONOMICAL MODELS; BREMSSTRAHLUNG; CORRELATION; EMISSION SPECTRA; GAMMA RAY OBSERVATORY; HYDROGEN; SKY SURVEYS (ASTRONOMY)
Imprint And Other Notes: Astronomy and Astrophysics vol. 292, no. 1 p. 82-91 December 1, 1994
Miscellaneous Notes: Research sponsored by the Netherlands Organization for Scientific Research NWO
Availability Source: Other Sources
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