Can black hole accretion produce Li-7?

Details Can black hole accretion produce Li-7? Can black hole accretion produce Li-7?

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...356..501j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 356, June 20, 1990, p. 501-506.

Astronomy and Astrophysics

Astrophysics

15

Accretion Disks, Black Holes (Astronomy), Lithium Isotopes, Nuclear Astrophysics, Nuclear Fusion, Stellar Physics, Abundance, Deuterium, Milky Way Galaxy, Stellar Mass Accretion

Scientific paper

An investigation has been made of spallation nuclear processes in an ion pressure-supported accretion torus around a black hole. It has been found that, within the torus, Be-9, B-10, and B-11 are produced in cosmic abundance ratios relative to Li-7, while D and He-3 production is relatively small, and Li-6 production is high by a factor of 3. However, Li-6 nuclei produced in the torus are preferentially destroyed in cooler regions, hence outflow from the torus may effectively serve to enrich the universe with Li-7. It is shown that the ion torus that may exist around a black hole at the Galactic center, or the hypothetical black holes which constitute the Galactic dark matter, could have been the site of Li-7 production. In case of the dark matter black holes, for plausible accretion disk viscosities, this mechanism requires massive black holes of M greater than 500 solar masses.

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