Brief Comments on ``The Shapiro Conjecture, Prompt or Delayed Collapse ?'' by Miller, Suen and Tobias

Details Brief Comments on ``The Shapiro Conjecture, Prompt or Delayed Collapse ?'' by Miller, Suen and Tobias Brief Comments on ``The Shapiro Conjecture, Prompt or Delayed Collapse ?'' by Miller, Suen and Tobias

1999-09-20

arxiv.org/abs/gr-qc/9909059v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages

Scientific paper

Recent numerical simulations address a conjecture by Shapiro that when two neutron stars collide head-on from rest at infinity, sufficient thermal pressure may be generated to support the hot remnant in quasi-static equilibrium against collapse prior to neutrino cooling. The conjecture is meant to apply even when the total remnant mass exceeds the maximum mass of a cold neutron star. One set of simulations seems to corroborate the conjecture, while another, involving higher mass progenitors each very close to the maximum mass, does not. In both cases the total mass of the remnant exceeds the maximum mass. We point out numerical subtleties in performing such simulations when the progenitors are near the maximum mass; they can explain why the simulations might have difficulty assessing the conjecture in such high-mass cases.

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