Statistics – Computation
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342..986b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 15, 1989, p. 986-998. Research supported by SNSF.
Statistics
Computation
59
Collisions, Computational Astrophysics, Hydrodynamics, Stellar Motions, Three Dimensional Models, White Dwarf Stars, Chemical Evolution, Digital Simulation, Main Sequence Stars, Milky Way Galaxy, Nuclear Energy, Stellar Interiors, Stellar Mass Ejection
Scientific paper
Three-dimensional numerical simulations are presented for collisions between white dwarfs, using a smooth-particle hydrodynamics code with 5000 particles. The code allows for radiation and degenerate pressure and uses a reduced nuclear network which models the large release of nuclear energy. Two different collision models are considered over a range of impact parameters: between two 0.06 solar-mass C-O white dwarfs and between 0.9 solar-mass and 0.7 solar-mass C-O white dwarfs. In nearly head-on collisions, a very substantial fraction of the mass is lost as a result of a large release of nuclear energy. In grazing collisions, the fraction of mass lost is close to that produced in collisions between main-sequence stars. The quantity of processed elements ejected into the ISM by these collisions does not significantly affect the chemical evolution of the Galaxy.
Benz Willy
Hills Jack G.
Thielemann Friederich-Karl
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