Constraints on r-process nucleosynthesis in accretion disks.

Details Constraints on r-process nucleosynthesis in accretion disks. Constraints on r-process nucleosynthesis in accretion disks.

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.350..403l&link_type=abstract

Nature, Vol. 350, No. 6317, p. 403 - 404

Computer Science

Scientific paper

It has been suggested that matter in accretion disks around compact objects such as black holes or neutron stars, which appear to be responsible for galactic X-ray sources, may experience ideal conditions for classical rapid neutron-capture ("r-process") nucleosynthesis. Systems in which accretion drives an outflow from a region near the compact object might thereby enrich the interstellar medium in r-process elements, such as europium. The author presents a more detailed assessment of the efficacy of this mechanism for the r-process. By considering the constraints imposed by typical accretion-disk conditions, he concludes that r-process elements are unlikely to have been made this way, largely because the total production is too low, by a factor of ≡105, to explain the observed abundances.

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