The Significance of The 15O(α,γ)19Ne Reaction Rate to Thermonuclear Burning on Neutron Stars at High Accretion Rates.

Details The Significance of The 15O(α,γ)19Ne Reaction Rate to Thermonuclear Burning on Neutron Stars at High Accretion Rates. The Significance of The 15O(α,γ)19Ne Reaction Rate to Thermonuclear Burning on Neutron Stars at High Accretion Rates.

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0178f&link_type=abstract

American Astronomical Society, HEAD meeting #9, #1.78; Bulletin of the American Astronomical Society, Vol. 38, p.342

Astronomy and Astrophysics

Astronomy

Scientific paper

Recently, the significance of the 15O(α,γ)19Ne reaction rate has been the subject of much investigation (Cooper et al. 2006, Fisker et al. 2006, Tan et al. 2006). At accretion rates somewhat below the Eddington limit, it has previously been found that an 15O(α,γ)19Ne reaction rate which is significantly lower than the Caughlan & Fowler (1988) rate makes burning stable resulting in copious amounts of 12C generation. At accretion rates that are above the Eddington limit, a 15O(α,γ)19Ne reaction rate which is lower than the Caughlan & Fowler (1988) rate makes bursting unstable again. The strength of the 15O(α,γ)19Ne reaction rate therefore has a non-trivial relation to the bursting behavior. In this paper, we investigate the behavior of the accreting system for a parametrized version of the reaction rate at high accretion rates using a static stability model and a dynamic simulation model.

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