Dynamics of Laterally Propagating Flames in X-ray Bursts. II. Realistic Burning & Rotation. (arXiv:2102.00051v2 [astro-ph.HE] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Harpole_A/0/1/0/all/0/1">A. Harpole</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ford_N/0/1/0/all/0/1">N. M. Ford</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Eiden_K/0/1/0/all/0/1">K. Eiden</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zingale_M/0/1/0/all/0/1">M. Zingale</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Willcox_D/0/1/0/all/0/1">D. E. Willcox</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cavecchi_Y/0/1/0/all/0/1">Y. Cavecchi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Katz_M/0/1/0/all/0/1">M. P. Katz</a>
We continue to investigate two-dimensional laterally propagating flames in
type I X-ray bursts using fully compressible hydrodynamics simulations. In the
current study we relax previous approximations where we artificially boosted
the flames. We now use more physically realistic reaction rates, thermal
conductivities, and rotation rates, exploring the effects of neutron star
rotation rate and thermal structure on the flame. We find that at lower
rotation rates the flame becomes harder to ignite, whereas at higher rotation
rates the nuclear burning is enhanced by increased confinement from the
Coriolis force and the flame propagates steadily. At higher crustal
temperatures, the flame moves more quickly and accelerates as it propagates
through the atmosphere. If the temperature is too high, instead of a flame
propagating across the surface the entire atmosphere burns steadily. All of the
software used for these simulations is freely available.
We continue to investigate two-dimensional laterally propagating flames in
type I X-ray bursts using fully compressible hydrodynamics simulations. In the
current study we relax previous approximations where we artificially boosted
the flames. We now use more physically realistic reaction rates, thermal
conductivities, and rotation rates, exploring the effects of neutron star
rotation rate and thermal structure on the flame. We find that at lower
rotation rates the flame becomes harder to ignite, whereas at higher rotation
rates the nuclear burning is enhanced by increased confinement from the
Coriolis force and the flame propagates steadily. At higher crustal
temperatures, the flame moves more quickly and accelerates as it propagates
through the atmosphere. If the temperature is too high, instead of a flame
propagating across the surface the entire atmosphere burns steadily. All of the
software used for these simulations is freely available.
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