Galactic distribution of interstellar Al-26

Details Galactic distribution of interstellar Al-26 Galactic distribution of interstellar Al-26

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....1..357m&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 1 p 357-360 (SEE N85-33902 22-93)

Physics

1

Aluminum Isotopes, Cosmic Rays, Galactic Nuclei, Gamma Rays, Interstellar Matter, Radiation Distribution, Disk Galaxies, Gamma Ray Spectrometers, Half Life, Heao 3, Solar Maximum Mission, Stellar Mass

Scientific paper

A narrow cosmic gamma ray line at 1809 keV was discovered which was interpreted as resulting from the decay of approximately 3 Mtheta of Al-26 residing in the galactic disk. While its intrinsic width was unresolved by the HEAO 3 spectrometer, a (1 sigma) limit of 3 keV FWHM was obtained; this corresponds to bulk motions of v 250 km/s, which is consistent with material at rest in the ISM. Sites which have been suggested include type II supernovae and massive stars which are members of the extreme population I, as well as novae and red giants which are associated with an older disk population. The HEAO 3 data was used to distinguish between these two stellar populations.

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