论文摘要
Axion-like particles（ALPs） are a promising kind of dark matter candidate particle that are predicted to couple with photons in the presence of magnetic fields. The oscillations between photons and ALPs traveling in the magnetic fields have been used to constrain ALP properties. In this work, we obtain some new constraints on the ALP mass ma and the photon-ALP coupling constant g with two different magnetic field models through TeV photons from PKS 2155–304. The first is the discrete-Φ model in which the magnetic field has the orientation angle Φ that changes discretely and randomly from one coherent domain to the next, and the second is the linearly-continuous-Φ model in which the magnetic field orientation angle Φ varies continuously across neighboring coherent domains. For the discrete-Φ model, we can obtain the best constraints on the ALP mass m1 = ma/（1 neV） = 0.1 and on the photon-ALP coupling constant g11= g/（10-11 GeV-1） = 5. The reasonable range of the ALP mass m1 is 0.08 ～ 0.2 when g11 = 5,and the only reasonable value of the photon-ALP coupling constant is g11 = 5 when m1 = 0.1. For the linearly-continuous-Φ model, we can obtain the best constraints on the ALP mass m1 = 0.1 and on the photon-ALP coupling constant g11 = 0.7. The reasonable range of the ALP mass m1 is 0.05 ～ 0.4 when g11= 0.7, and the reasonable range of the photon-ALP coupling constant g11 is 0.5 ～ 1 when m1 = 0.1.All of the results are consistent with the upper bound（g < 6.6 × 10-11 GeV-1, i.e., g11 < 6.6） set by the CAST experiment.
论文目录
文章来源
类型: 期刊论文
作者: Jia Bu,Ya-Ping Li
来源: Research in Astronomy and Astrophysics 2019年10期
年度: 2019
分类: 基础科学
专业: 天文学
单位: Department of Astronomy, Xiamen University,Shanghai Astronomical Observatory
分类号: P159
页码: 154-160
总页数: 7
文件大小: 1030K
下载量: 2