ournal of C osmology and A stroparticle hysics J Evolution of black holes through a nonsingular cosmological bounce
ournal of C osmology and A stroparticle hysics J Evolution of black holes through a nonsingular cosmological bounce
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宇宙学和星际粒子物理学期刊 J 通过非奇异宇宙学反弹的黑洞演化
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通讯作者：
R. Nouira
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作者：
A. Aounallah;I. Lahouel;S. Belghali;A. Romdhane;N. Ghariani;C. Belajouza;M. Denguezli;R. Nouira
.研究了非奇异宇宙学反弹过程中黑洞的经典动力学。以一个由鬼场和普通标量场驱动的非奇异弹跳宇宙学的简单模型为例，我们使用爱因斯坦方程的非线性演化来跟踪不同大小的旋转和非旋转黑洞的弹跳。零能量条件的违反允许收缩黑洞事件视界，我们发现，对于足够大的黑洞（相对于最小哈勃半径），黑洞视视界可以在收缩阶段消失。尽管如此，我们表明，大多数的本地宇宙学的演化仍然在很大程度上unapected的黑洞的存在。我们发现，独立于黑洞的初始质量，黑洞的事件视界在整个反弹过程中持续存在，后期动力学由一个膨胀的宇宙组成，其中黑洞的质量与其初始值相当。
. We study the classical dynamics of black holes during a nonsingular cosmological bounce. Taking a simple model of a nonsingular bouncing cosmology driven by the combination of a ghost and ordinary scalar field, we use nonlinear evolutions of the Einstein equations to follow rotating and non-rotating black holes of different sizes through the bounce. The violation of the null energy condition allows for a shrinking black hole event horizon and we find that for sufficiently large black holes (relative to the minimum Hubble radius) the black hole apparent horizon can disappear during the contraction phase. Despite this, we show that most of the local cosmological evolution remains largely unaffected by the presence of the black hole. We find that, independently of the black hole’s initial mass, the black hole’s event horizon persists throughout the bounce, and the late time dynamics consists of an expanding universe with a black hole of mass comparable to its initial value.