Hydrodynamic simulations of the core helium flash

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dc.creatorMocak, M.
dc.creatorMueller, E.
dc.creatorWeiss, A.
dc.creatorKifonidis, K.
dc.date2009-04-30
dc.date.accessioned2026-07-07T13:10:36Z
dc.date.available2026-07-07T13:10:36Z
dc.descriptionWe describe and discuss hydrodynamic simulations of the core helium flash using an initial model of a 1.25 M_sol star with a metallicity of 0.02 near at its peak. Past research concerned with the dynamics of the core helium flash is inconclusive. Its results range from a confirmation of the standard picture, where the star remains in hydrostatic equilibrium during the flash (Deupree 1996), to a disruption or a significant mass loss of the star (Edwards 1969; Cole & Deupree 1980). However, the most recent multidimensional hydrodynamic study (Dearborn 2006) suggests a quiescent behavior of the core helium flash and seems to rule out an explosive scenario. Here we present partial results of a new comprehensive study of the core helium flash, which seem to confirm this qualitative behavior and give a better insight into operation of the convection zone powered by helium burning during the flash. The hydrodynamic evolution is followed on a computational grid in spherical coordinates using our new version of the multi-dimensional hydrodynamic code HERAKLES, which is based on a direct Eulerian implementation of the piecewise parabolic method.
dc.description6 pages, 5 figures. IAUS 252 Conference Proceeding (Sanya, China): "The art of modeling stars in the 21st century"
dc.identifierhttps://arxiv.org/abs/0904.4867
dc.identifierhttp://arxiv.org/abs/0904.4867
dc.identifier2008IAUS..252..215M
dc.identifierdoi:10.1017/S1743921308022813
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229053
dc.subjectSolar and Stellar Astrophysics
dc.titleHydrodynamic simulations of the core helium flash
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