A unified synthetic spectal evolution model of galaxis from the Dark Ages to the present-day Universe

2015 Fiscal Year Final Research Report

• Project/Area Number: 23340046
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Nagoya University
• Principal Investigator: Takeuchi Tsutomu 名古屋大学, 理学(系)研究科(研究院), 准教授 (90436072)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 理論天文学 / 光赤外線天文学 / 銀河形成進化 / 星形成 / 輻射

Outline of Final Research Achievements

Heavy elements, the origin of planets and life, have not produced by the Big Bang, but synthesized in stars. Hence, to unveil the cosmic production history of heavy elements, we must understand the formation and evolution of galaxies, i.e., vast number of repetitions of birth and death of stars. In this study, we tackled this problem by treating the formation of stars and dust as well as the complicated processes of dust grains in the interstellar medium in a self-consistent manner. First we succeeded in constructing a theoretical framework that enables us to treat the evolution dust grains for the whole lifetime of galaxies (10 billion years or more) by taking into account the formation, growth, and destruction of dust grains. Further, we constructed a radiation transfer model of galaxy spectrum from radio to ultraviolet wavelengths, which can handle the complicated structure of the interstellar medium.

Free Research Field

銀河物理学　観測的宇宙論　応用統計学