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arXiv 1503.02165gr-qc
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引力坍缩、无剪切各向异性辐射星

Gravitational collapse, shear-free anisotropic radiating star

B. C. Tewari, Kali Charan

摘要:

给出了无剪切球对称各向异性流体径向热流下爱因斯坦场方程的一类精确解。内度规满足所有相关的物理和热力学条件,并在边界上与Vaidya外度规匹配。最初的内部解决方案代表一个静态配置的耗散流体,然后逐渐开始演变成辐射崩溃。在坍缩开始的瞬间和坍缩位形到达黑洞视界的阶段,远距离观测者在无穷远处观测到的视光度和有效表面温度在遥远的过去都为零。

英文摘要:

We present a class of exact solutions of Einstein field equations for a shear-free spherically symmetric anisotropic fluid undergoing radial heat flow. The interior metric fulfilled all the relevant physical and thermodynamic conditions and matched with Vaidya exterior metric over the boundary. Initially the interior solutions represent a static configuration of dissipative fluid which then gradually starts evolving into radiating collapse. The apparent luminosity observed by the distant observer at rest at infinity and the effective surface temperature are zero in remote past at the instance when collapse begins and at the stage when collapsing configuration reach the horizon of the black hole.

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