AI 中文总结
本研究利用快速射电暴（FRBs）作为探针，结合CHIME/FRB数据集，在通用修正引力理论框架下约束了暗物质中原初黑洞的占比，还揭示了修正引力对FRB引力透镜的屏蔽效应。
AI 中文摘要
近几十年来，学界提出了大量修正引力理论以解决各类宇宙学与天体物理学问题，尽管诸多理论仍具可行性，但对其参数的观测约束正日益严格。快速射电暴（FRBs）尤其已成为探测宇宙学与基础物理的有力探针。本研究探究了某通用修正引力理论对FRB引力透镜的影响，通过分析CHIME/FRB数据集，在该理论框架下约束了暗物质中原初黑洞的占比；此外，研究表明修正引力会对引力透镜引入屏蔽效应，类似等离子体对光线的散射效应。
英文摘要
In recent decades, a multitude of modified gravity theories have been proposed to address a variety of cosmological and astrophysical problems. While many of these theories remain viable, observational constraints on their parameters are increasingly stringent. Fast Radio Bursts (FRBs), in particular, have emerged as powerful probes of cosmology and fundamental physics. This study investigates the implications of a generic modified gravity theory for gravitational lensing by FRBs. By analyzing the dataset of CHIME/FRBs, we constrain the fraction of dark matter composed of primordial black holes within this theoretical framework. Furthermore, we demonstrate that modified gravity introduces a screening effect on gravitational lensing, analogous to the scattering effect of plasma on light rays.
Comments3 pages with 1 figure; based on poster in IAU XXXII General Assembly, August 2024, Cape Town
Journal refProceedings of the International Astronomical Union 20(A32), 436-438 (2024)
