Dynamics of Laterally Propagating Flames in X-Ray Bursts. II. Realistic Burning and Rotation

Autor:	Michael Zingale, Nicole ford, K. Eiden, Y. Cavecchi, D. E. Willcox, Alice Harpole, Maximilian Katz
Rok vydání:	2021
Předmět:	Physics Accretion (meteorology) Astronomy and Astrophysics Rotation Computational physics Atmosphere Reaction rate Neutron star Space and Planetary Science Nucleosynthesis Thermal Compressibility Physics::Chemical Physics Astrophysics - High Energy Astrophysical Phenomena
Zdroj:	The Astrophysical Journal. 912:36
ISSN:	1538-4357 0004-637X
Popis:	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. Comment: 19 pages, 19 figures, accepted for publication in ApJ
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81520d06b41b004ca1722d6a116ab024 https://doi.org/10.3847/1538-4357/abee87 Zobrazit plný text záznamu