Simulations of X-ray Bursts

Convection in X-ray bursts

We are modeling mixed H/He X-ray bursts with our low Mach number hydrodynamics code Maestro. The nucleosynthesis is described by a 10-nuclei network that approximates hot-CNO, 3-alpha, and rp-process breakout. These simulations are done in a plane-parallel geometry, with a 6 cm resolution. These calculations follow on from our initial pure He simulations. Our goal is to understand how a multi-dimensional treatment of the convection alters the nucleosynthesis.

Our results are described in the following papers:

Here's a model of the three-dimensional convection:

Flame spreading in X-ray bursts

We are also using Castro to model the flame spreading across the surface of the neutron star.