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:
- Multidimensional Modeling of Type I X-ray Bursts. I. Two-Dimensional Convection Prior to the Outburst of a Pure He Accretor, Malone, C. M., Nonaka, A. J., Almgren, A. S., Bell, J. B., & Zingale, M., 2011, ApJ, 728, 118
- Multidimensional Modeling of Type I X-ray Bursts. II. Two-Dimensional Convection in a Mixed H/He Accretor, Malone, C. M., Zingale, M., Nonaka, A., Almgren, A. S., & Bell, J. B., 2014, ApJ, 788, 115
- Comparisons of Two- and Three-Dimensional Convection in Type I X-ray Bursts, Zingale, M., Malone, C. M., Nonaka, A., Almgren, A. S., & Bell, J. B., 2015, ApJ, 807, 60
Here's a model of the three-dimensional convection: