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Positron annihilation gamma rays from novaeThe potential for observing annihilation gamma rays from novae is investigated. These gamma rays, a unique signature of the thermonuclear runaway models of novae, would result from the annihilation of positrons emitted by beta(+)-unstable nuclei produced near the peak of the runaway and carried by rapid convection to the surface of the nova envelope. Simple models, which are extensions of detailed published models, of the expansion of the nova atmospheres are evolved. These models serve as input into investigations of the fate of nearby Galactic fast novae could yield detectable fluxes of electron-positron annihilation gamma rays produced by the decay of N-13 and F-18. Although nuclear gamma-ray lines are produced by other nuclei, it is unlikely that the fluxes at typical nova distances would be detectable to present and near-future instruments.
Document ID
19880033162
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Leising, Mark D.
(Rice Univ. Houston, TX, United States)
Clayton, Donald D.
(Rice University Houston, TX, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 323
ISSN: 0004-637X
Subject Category
Space Radiation
Report/Patent Number
AD-A225271
Accession Number
88A20389
Funding Number(s)
CONTRACT_GRANT: N00014-85-C-2264
CONTRACT_GRANT: NASA ORDER S-10987-C
Distribution Limits
Public
Copyright
Other

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