Generation of Cosmic Magnetic Fields and Their Influence on Structure Formation

2016 Fiscal Year Final Research Report

• Project/Area Number: 25287057
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: SUGIYAMA Naoshi 名古屋大学, 理学(系)研究科(研究院), 教授 (70222057)
• Co-Investigator(Kenkyū-buntansha): 市來 淨與 名古屋大学, 基礎理論研究センター, 講師 (10534480)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 宇宙論 / 宇宙磁場 / 宇宙大規模構造 / 構造形成 / 最初期星形成

Outline of Final Research Achievements

We investigate the origin of cosmic magnetic fields and their influence on structure formation in the universe. What we have done are, (1) Evaluate magnetic fields generated from the vector mode perturbations and constrain models from observations. We especially focus on Einstein-aether theory, which is one of modified gravity theories, and topological defects such as global texture and cosmic string. (2) First time thoroughly calculate magnetic field generation due to second order perturbations and find resultant magnetic fields can be a seed of cosmic magnetic fields. (3) Evaluate cosmic magnetic fields generated by radiation emitted from active galactic nuclei’s in the early universe.

Free Research Field

宇宙論