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arXiv 1303.0430gr-qchep-th
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具有相互作用真空能量密度的黑洞形成:曲率效应

Black Hole Formation with an Interacting Vacuum Energy Density: Curvature Effects

E. L. D. Perico, J. A. S. Lima, M. Campos

摘要:

研究了具有任意曲率参数的FLRW型恒星球对称大质量核的引力坍缩,其中流体组分与填充FLRW型几何的不断增长的真空能量密度相互作用.得到了所有自由参数值的完整精确解,并详细讨论了曲率项对坍缩时间、黑洞质量等物理量的影响.我们证明了在相同的初始条件下,黑洞的总质量只依赖于有效物质密度参数(包括真空分量)。结果还表明,曲率项的贡献并不改变形成黑洞的分析条件,即视视界,但对其余的物理量作了定量修正。

英文摘要:

The gravitational collapse of a spherically symmetric massive core of a star in which the fluid component is interacting with a growing vacuum energy density filling a FLRW type geometry with an arbitrary curvature parameter is investigated. The complete set of exact solutions for all values of the free parameters are obtained and the influence of the curvature term on the collapsing time, black hole mass and other physical quantities are also discussed in detail. We show that for the same initial conditions the total black hole mass depends only on the effective matter density parameter (including the vacuum component). It is also shown that the analytical condition to form a black hole i.e. the apparent horizon is not altered by the contribution of the curvature terms, however, the remaining physical quantities are quantitatively modified.

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