Radiative gravastar with Gibbons-Hawking temperature
Abstract
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 ultracompact 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 ultracompact 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.
- Publication:
-
Physical Review D
- Pub Date:
- November 2022
- DOI:
- 10.1103/PhysRevD.106.105006
- arXiv:
- arXiv:2203.14519
- Bibcode:
- 2022PhRvD.106j5006N
- Keywords:
-
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- E-Print:
- Revised version with 33 pages, 3 figures