Alex began with an overview of type I X-ray bursts and their various accretion rate regimes. He then described his numerical simulations of bursts using the 1D Kepler hydro code which he coupled to a large reaction network. Runs with H/He accreting at high Mdot with low Z show long (~200s) tails due to rp-process burning and little 12C in the ashes of burning (X12~0.001). In runs with low Mdot and high Z, the ignition takes place in a pure He layer, leading to a very quick burst rise (~1 ms) and near Eddington luminosity at peak. Runs with very low Mdot undergo weak hydrogen flashes.
Some of the results may be sensitive to uncertainties in the nuclear physics and reaction rates and are a subject of future study.
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