标题： 香巴拉猜想：中子星迎面碰撞时的即时崩塌还是延迟崩塌？ 显示英文标题

标题： The Shapiro Conjecture: Prompt or Delayed Collapse in the head-on collision of neutron stars?

摘要： 我们研究了两颗中子星迎头碰撞时即时坍缩与延迟坍缩的问题。 我们证明了黑洞的即时形成是可能的，这与夏皮罗的一个猜想相矛盾，该猜想声称坍缩会延迟到中微子冷却之后。 我们讨论了夏皮罗猜想所提供的见解及其局限性。 通过对问题中涉及的多个时间尺度进行分析，提供了对该猜想局限性的理解。 在我们的研究中，进行了基于爱因斯坦理论的广义相对论模拟，其中完整的爱因斯坦方程组与广义相对论流体力学方程组耦合在一起。 显示英文摘要

摘要： We study the question of prompt vs. delayed collapse in the head-on collision of two neutron stars. We show that the prompt formation of a black hole is possible, contrary to a conjecture of Shapiro which claims that collapse is delayed until after neutrino cooling. We discuss the insight provided by Shapiro's conjecture and its limitation. An understanding of the limitation of the conjecture is provided in terms of the many time scales involved in the problem. General relativistic simulations in the Einstein theory with the full set of Einstein equations coupled to the general relativistic hydrodynamic equations are carried out in our study.