Nondivergent deflection of light around a photon sphere of a compact object
Nondivergent deflection of light around a photon sphere of a compact object
复制标题
致密物体光子球周围光的非发散偏转
DOI:
10.1103/physrevd.105.084014
复制
发表时间:
2022
影响因子:
5
通讯作者:
Hideki Asada
中科院分区:
文献类型:
--
作者:
Ryuya Kudo;Hideki Asada
We demonstrate that the location of a stable photon sphere (PS) in a compact object is not always an edge such as the inner boundary of a black hole shadow, whereas the location of an unstable PS is known to be the shadow edge; notably, in the Schwarzschild black hole. If a static spherically symmetric (SSS) spacetime has the stable outermost PS, the spacetime cannot be asymptotically flat. A nondivergent deflection is caused for a photon traveling around a stable PS, though a logarithmic divergent behavior is known to appear in most of SSS compact objects with an unstable photon sphere. The reason for the nondivergence is that the closest approach of a photon is prohibited in the immediate vicinity of the stable PS when the photon is emitted from a source (or reaches a receiver) distant from a lens object. The finite gap size depends on the receiver and source distances from the lens as well as the lens parameters. The mild deflection angle of light can be approximated by an arcsine function. A class of SSS solutions in Weyl gravity exemplify the nondivergent deflection near the stable outer PS.
登录
查看更多内容
影响因子:
1.3
作者:
Carla Cederbaum;G. Galloway
通讯作者:
Carla Cederbaum;G. Galloway
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
G. Gibbons;C. Warnick
通讯作者:
C. Warnick
DOI:
10.1093/ptep/ptx072
发表时间:
2017-04
期刊:
arXiv: General Relativity and Quantum Cosmology
影响因子:
--
作者:
H. Yoshino;K. Izumi;T. Shiromizu;Yoshimune Tomikawa
通讯作者:
H. Yoshino;K. Izumi;T. Shiromizu;Yoshimune Tomikawa
影响因子:
3.5
作者:
Keisuke Izumi;Yoshimune Tomikawa;Tetsuya Shiromizu;Hirotaka Yoshino
通讯作者:
Hirotaka Yoshino
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
Y. Kasamatsu;T. Yokokita;K. Toyomura;Y. Shigekawa;H. Haba;J. Kanaya;M. Huang;Y. Ezaki;T. Yoshimura;K. Morita;and A. Shinohara;泉 圭介
通讯作者:
泉 圭介