Mass loss during the core helium flash

Abstract

view Abstract Citations (31) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Mass loss during the core helium flash Deupree, R. G. ; Cole, P. W. Abstract A small nuclear-reaction network, individual alpha-capture reactions, and an expanding coordinate system are used to improve the two-dimensional hydrodynamic calculations of the core helium flash by Cole and Deupree (1980). The nuclear modifications allow the inclusion of neon photodisintegration, which limits the peak flash temperature to about two billion degrees, while the expanding coordinate system permits the flash to be followed for about 50 sec after the start of the violent runaway. The radial velocity time history at the expanding, outer boundary of the two-dimensional calculations is then used as an inner boundary condition for a one-dimensional hydrodynamic calculation of the envelope to determine whether mass loss occurs. It is found that the model, with an initial total mass of one solar mass, leaves a 0.65-solar mass remnant. Publication: The Astrophysical Journal Pub Date: October 1981 DOI: 10.1086/183653 Bibcode: 1981ApJ...249L..35D Keywords: Cores; Helium; Hydrodynamic Equations; Nuclear Explosions; Stellar Evolution; Stellar Mass Ejection; Alpha Particles; High Energy Interactions; Particle Interactions; Radial Velocity; Stellar Envelopes; Stellar Structure; Astrophysics full text sources ADS |