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HEAO 3 discovery of Al-26 in the interstellar mediumA new analysis technique was used with HEAO 3 satellite gamma ray data to quantify the galactic 1809 keV emission. A method of bins was applied in summing for specific scan directions, followed by fitting the source and background components. The 1809 keV line of Al-26 was significant because of the recent discovery that Al-26 was overabundant in meteoritic material and implanted during solar system formation. The HEAO 3 flux indicated a current decay of 3 solar masses of Al-26 per year in the interstellar medium, possibly occurring in red giants and massive main sequence stars. The ratio of the observed Al-26 to the Al-27 flux was similar to that measured in meteorites, which suggests that the ratio is normal for the galactic medium and that no supernova triggered the protosolar nebular collapse.
Document ID
19850039071
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mahoney, W. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ling, J. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wheaton, W. A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jacobson, A. S.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 12, 2013
Publication Date
November 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 286
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A21222
Distribution Limits
Public
Copyright
Other

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