Radiative gravastar with Gibbons-Hawking temperature
Radiative gravastar with Gibbons-Hawking temperature
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DOI：
10.1103/physrevd.106.105006
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发表时间：
2022-03
影响因子：
5
通讯作者：
K. Nakao;Kazumasa Okabayashi;T. Harada
中科院分区：
文献类型：
--
作者：
K. Nakao;Kazumasa Okabayashi;T. Harada
我们研究了球对称引力坍缩玩具模型中的量子粒子产生，其最终产物不是黑洞而是引力星。先前的研究表明，即使在引力坍缩形成无水平超致密物体的情况下，在引力坍缩的后期也会产生称为瞬态霍金辐射的热辐射，而坍缩运动的突然停止形成无水平超致密物体会导致一个或两个量子粒子产生的爆发。本文所研究的模型与前人的模型有很大不同的行为是在两次爆发之间重力星的热谱量子辐射。辐射的温度不是由系统的引力质量决定的霍金温度，而是引力星内部德西特核的Gibbons-Hawking温度。
We study the quantum particle creation in a toy model of spherically symmetric gravitational collapse whose final product is not a black hole but a gravastar. Precedent studies revealed that even in the case of the gravitational collapse to form a horizonless ultra-compact object, thermal radiation named transient Hawking radiation is generated at the late stage of the gravitational collapse, and a sudden stop of collapsing motion to form a horizonless ultra-compact object causes one or two bursts of quantum particle creation. The very different behavior of the model studied in this paper from the precedent ones is quantum radiation with a thermal spectrum from the gravastar between two bursts. The temperature of the radiation is not the same as the Hawking one determined by the gravitational mass of the system but the Gibbons-Hawking one of the de Sitter core inside the gravastar.