Study on the evolution of galaxies and the large scale structure through HI 21cm line observations

2016 Fiscal Year Final Research Report

• Project/Area Number: 24340048
• 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: Ichiki Kiyotomo 名古屋大学, 基礎理論研究センター, 講師 (10534480)
• Co-Investigator(Kenkyū-buntansha): 高橋 慶太郎 熊本大学, 自然科学研究科, 准教授 (80547547) ; 井上 進 国立研究開発法人理化学研究所, 長瀧天体ビッグバン研究室, 研究員 (80413954)
• Co-Investigator(Renkei-kenkyūsha): TAKEUCHI Tsutomu 名古屋大学, 理学研究科, 准教授 (90436072) ; YOKOYAMA Shuichiro 立教大学, 理学部物理学科, 助教 (80529024)
• Project Period (FY): 2012-04-01 – 2017-03-31
• Keywords: 宇宙再電離

Outline of Final Research Achievements

The epoch after recombination and reionization of the universe by UV lights emitted from the first class of stars and galaxies is called the dark age, because still there are few observational information on that epoch. Here we focus on 21cm line of neutral hydrogen atoms because they should be abundant at that epoch. Through the distribution of neutral hydrogen gas and the number of mini-halos that hosted first stars and galaxies by using 21cm emission and absorption lines, we investigate how we can extract information on cosmological parameters and physical conditions of reionization of the universe.

Free Research Field

観測的宇宙論