Are Neutron-Rich Elements Produced in the Collapse of Strange Dwarfs ?

Details Are Neutron-Rich Elements Produced in the Collapse of Strange Dwarfs ? Are Neutron-Rich Elements Produced in the Collapse of Strange Dwarfs ?

2005-10-31

arxiv.org/abs/astro-ph/0510860v1

Int.J.Mod.Phys.D15:153-164,2006

Astronomy and Astrophysics

Astrophysics

Accepted for publication in IJMPD

Scientific paper

10.1142/S0218271806007584

The structure of strange dwarfs and that of hybrid stars with same baryonic number is compared. There is a critical mass (M~0.24M_sun) in the strange dwarf branch, below which configurations with the same baryonic number in the hybrid star branch are more stable. If a transition occurs between both branches, the collapse releases an energy of about of 3x10^{50} erg, mostly under the form of neutrinos resulting from the conversion of hadronic matter onto strange quark matter. Only a fraction (~4%) is required to expel the outer neutron-rich layers. These events may contribute significantly to the chemical yield of nuclides with A>80 in the Galaxy, if their frequency is of about one per 1500 years.

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