Abstract
view Abstract Citations (19) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Production of 26Al in Supermassive Stars and the Gamma-Ray Line Flux from the Galactic Center Hillebrandt, Wolfgang ; Thielemann, Friedrich-Karl ; Langer, Norbert Abstract The evolution through contraction and explosion of a high-metallicity (Z = 0.04) supermassive star of 500,000 solar masses is computed. It is shown that in the inner 20-percent of the star, a significant fraction of the preexisting magnesium is converted into Al-26 leading to the production of about 50 solar masses of Al-26. This amount is sufficient to explain the observed 1.8 MeV gamma-ray line flux from the Galactic center if such a supermassive star exploded there within the last two million years. The ejecta will be enriched in the isotopes C-13 and O-17, but, with the exception of lithium and nitrogen, all elements are produced in roughly solar relative proportions. Publication: The Astrophysical Journal Pub Date: October 1987 DOI: 10.1086/165669 Bibcode: 1987ApJ...321..761H Keywords: Aluminum 26; Galactic Nuclei; Gamma Rays; Nuclear Fusion; Stellar Evolution; Stellar Mass; Supermassive Stars; Computational Astrophysics; Field Of View; Heao; Interstellar Matter; Metallic Stars; Red Giant Stars; Astrophysics; GALAXIES: NUCLEI; GAMMA RAYS: GENERAL; NUCLEOSYNTHESIS; STARS: MASSIVE full text sources ADS |
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