Theoretical and observational study on the origin of cosmic magnetic fields

我做过星系间磁场作为原始磁场的理论和观测研究。从宇宙微波背景观测数据出发，推导了由原始矢量模式产生的原始磁场的理论预测，并对其进行了约束。磁场下界为10 ~ -20高斯，由来自活动星系核Mrk 501和Mrk 421的次延迟GeV伽马射线的约束得到。最后，我开发了一种法拉第层析成像算法，该算法可以用于未来的宽带射电望远镜，使我们能够重建磁场和极化发射率沿视线的分布。

I have done theoretical and observational studies on intergalactic magnetic fields as primordial magnetic fields. I derived a theoretical prediction on primordial magnetic fields generated from primordial vector mode and a constraint on it was put from the observational data of cosmic microwave background. Lower bounds on magnetic fields, 10 to -20th Gauss, were obtained from constraints on the secondary delayed GeV gamma-rays from active galactic nuclei Mrk 501 and Mrk 421. Finally, I have developed an algorithm for Faraday tomography, which is possible for future wideband radio telescope and enable us to reconstruct the distribution of magnetic fields and polarization emissivity along the line of sight.