Reconstruction for History of the Universe with Statistical Causal Inference

2014 Fiscal Year Final Research Report

• Project/Area Number: 24650145
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Statistical science
• Research Institution: Iwate University
• Principal Investigator: HANAMI Hitoshi 岩手大学, 人文社会科学部, 教授 (00212150)
• Co-Investigator(Kenkyū-buntansha): YAOSHIMORI Kyu 岩手大学, 工学部, 准教授 (40322961)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 多波長深宇宙探査 / 銀河形成 / 巨大ブラックホール / 電波 / ミリ波 / 遠赤外線 / 可視光 / X線

Outline of Final Research Achievements

With this grant, we could redevelop database of 0.1 billion galaxies detected with our deep-space multi-wavelength surveys in which their redshifts, stellar masses, star formation rates, and dust masses were re-derived from an analysis of their spectral energy distributions. We also reclassified ~1000 infrared galaxies into star-formation dominate, active galactic nuclei dominate, and their co-existing populations with their spectral energy distributions, and derive the accretion rates on to the central massive black hole for AGN galaxies in which the AGN tend to suppress star formation in the hosts. The existence of the AGNs and star-forming activities in these galaxies could be confirmed with the follow-up Chandra and JVLA observations. Even though we could obtain above astronomical understandings from new multi-wavelength data, we should still left statistical causal inference analysis due to the observational errors as future works.

Free Research Field

光赤外天文学