Light Rings, Accretion Disks and Shadows of Hayward Boson Stars
Light Rings, Accretion Disks and Shadows of Hayward Boson Stars
Zhen-Hua Zhao 1Yi-Ning Gu 1Shu-Cong Liu 2Zi-Qian Liu 3Yong-Qiang Wang2
作者信息
- 1. Department of Applied Physics, Shandong University of Science and Technology, Qingdao, 266590, China
- 2. Lanzhou Center for Theoretical Physics, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- 3. Department of Applied Physics, Shandong University of Science and Technology, Qingdao, 266590, China;Lanzhou Center for Theoretical Physics, School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China
- 折叠
摘要
In this paper, we investigate the Einstein-Hayward gravity coupled to a complex scalar field without self-interaction. Using numerical methods, we construct a class of Hayward boson star solutions and examine their fundamental properties as well as the optical appearance of the accretion disk. Our results show that in the frozen state, both the quasi-horizon radius and the light ring radii increase with the magnetic monopole charge. Furthermore, using ray-tracing method, we find that for non-frozen states, the absence of an quasi-horizon results in the appearance of multiple photon rings within the shadow region of the accretion disks. In contrast, for frozen states, the presence of a quasi-horizon causes their images to resemble those of Schwarzschild black holes, with no additional photon rings appearing.
Abstract
In this paper, we investigate the Einstein-Hayward gravity coupled to a complex scalar field without self-interaction. Using numerical methods, we construct a class of Hayward boson star solutions and examine their fundamental properties as well as the optical appearance of the accretion disk. Our results show that in the frozen state, both the quasi-horizon radius and the light ring radii increase with the magnetic monopole charge. Furthermore, using ray-tracing method, we find that for non-frozen states, the absence of an quasi-horizon results in the appearance of multiple photon rings within the shadow region of the accretion disks. In contrast, for frozen states, the presence of a quasi-horizon causes their images to resemble those of Schwarzschild black holes, with no additional photon rings appearing.引用本文复制引用
Zhen-Hua Zhao,Yi-Ning Gu,Shu-Cong Liu,Zi-Qian Liu,Yong-Qiang Wang.Light Rings, Accretion Disks and Shadows of Hayward Boson Stars[EB/OL].(2026-07-27)[2026-07-30].https://chinaxiv.org/abs/202607.00268.学科分类
天文学/物理学
