Critical Phenomena in Head-on Collisions of Neutron Stars

Details Critical Phenomena in Head-on Collisions of Neutron Stars Critical Phenomena in Head-on Collisions of Neutron Stars

2006-03-24

arxiv.org/abs/gr-qc/0603094v3

Phys.Rev.Lett.98:131101,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages,6 figures, 15 references

Scientific paper

10.1103/PhysRevLett.98.131101

We found type I critical collapses of compact objects modeled by a polytropic equation of state (EOS) with polytropic index $\Gamma=2$ without the ultra-relativistic assumption. The object is formed in head-on collisions of neutron stars. Further we showed that the critical collapse can occur due to a change of the EOS, without fine tuning of initial data. This opens the possibility that a neutron star like compact object, not just those formed in a collision, may undergo a critical collapse in processes which slowly change the EOS, such as cooling.

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