Nonminimally coupled scalar field in Schwarzschild - de Sitter spacetime: Geodesic synchrotron radiation

被引：0
作者：
Brito, Joao P. B. [1 ]
Bernar, Rafael P. [1 ]
Crispino, Luis C. B. [1 ]
机构：
[1] Univ Fed Para, Programa Posgrad Fis, BR-66075110 Belem, PA, Brazil
来源：
PHYSICAL REVIEW D | 2024年 / 109卷 / 10期
关键词：
BLACK-HOLE; PARTICLE CREATION; EVENT HORIZON; UNIVERSE;
D O I：
10.1103/PhysRevD.109.104024
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We analyze the scalar radiation emitted by a source interacting with a nonminimally coupled scalar field in four-dimensional Schwarzschild -de Sitter spacetime. We obtain the emission probability using quantum field theory in curved spacetimes at tree level. We find that the source emits synchrotron -type radiation for orbits near the photon sphere for all allowed values of the parameters. We also find that the emitted power strongly depends on the coupling to the curvature scalar. In particular, the previously observed enhancement in the contribution of lower multipoles to the emitted power in this spacetime with minimal coupling is absent when conformal coupling is considered.
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