Convection from Burning Preceding a Type I X-ray Burst

Details Convection from Burning Preceding a Type I X-ray Burst Convection from Burning Preceding a Type I X-ray Burst

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547403m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #474.03; Bulletin of the American Astronomical Society, Vol. 42, p.521

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In the current model of a Type I X-ray Burst, accretion builds a layer of H/He on the surface of a neutron star. Once the layer is deep enough, the energy generation rate from reactions exceeds the local cooling rate and a thermonuclear runaway ensues. We present results of plane-parallel 2d simulations of the convection preceding the outburst for a pure He accretor using the low Mach number hydrodynamics code, MAESTRO. Furthermore, we present results that show that the resolution requirement to properly resolve the burning layer in multiple dimensions is much higher than that used in the literature.
This work is supported under the DOE/Office of Nuclear Physics, grant No. DE-FG02-06ER41448 (Stony Brook) and by the SciDAC Program of the DOE Office of Mathematics, Information, and Computational Sciences under the DOE under contract No. DE-AC02-05CH11231. We utilized the NYblue machine available through the NYCCS consortium and the franklin machine available at NERSC.

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