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arXiv 0910.0485gr-qc
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Reissner-Nordström-(anti)de Sitter度规中的位流:数值结果

Potential flows in the Reissner-Nordström-(anti) de Sitter metric: numerical results

Gustavo C. Colvero, Maximiliano Ujevic

摘要:

本文用$p=K n^γ$状态方程数值求解了理想流体稳态流动的速度场(流线)积分曲线、密度等值线和吸积率。研究了Reissner-Nordström-(anti)de Sitter时空中与黑洞和刚性球有关的流线和速度场。对于每种情况,都使用轮廓线研究流体密度。对于$γ\neq 2$,我们发现所研究的流体性质对电荷和宇宙学常数的变化更敏感。同时,发现吸积率随宇宙学常数的增大而增大,随宇宙学常数的减小而减小。

英文摘要:

Numerical solutions for the integral curves of the velocity field (streamlines), the density contours, and the accretion rate of a steady-state flow of an ideal fluid with $p=K n^γ$ equation of state are presented. The streamlines and velocity fields associated with a black hole and a rigid sphere in a Reissner-Nordström-(anti) de Sitter spacetimes are studied in some detail. For each case the fluid density is studied using contour lines. For $γ\neq 2$, we found that the studied properties of the fluid are more sensitive to variations of the electric charge and the cosmological constant. Also, the accretion rate was found to increase or decrease when the cosmological constant increases or decreases respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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