Cody Raskin, Evan Scannapieco, Chris Fryer, Gabriel Rockefeller, F. X. Timmes
We carry out a comprehensive smooth particle hydrodynamics simulation survey
of double-degenerate white dwarf binary mergers of varying mass combinations in
order to establish correspondence between initial conditions and remnant
configurations. We find that all but one of our simulation remnants share
general properties such as a cold, degenerate core surrounded by a hot disk,
while our least massive pair of stars forms only a hot disk. We characterize
our remnant configurations by the core mass, the rotational velocity of the
core, and the half-mass radius of the disk. We also find that some of our
simulations with very massive constituent stars exhibit helium detonations on
the surface of the primary star before complete disruption of the secondary.
However, these helium detonations are insufficiently energetic to ignite
carbon, and so do not lead to prompt carbon detonations.
View original:
http://arxiv.org/abs/1112.1420
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