The FMOS-COSMOS survey of star-forming galaxies at z~1.6 using Subaru/FMOS

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400221
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: SILVERMAN John 東京大学, カブリ数物連携宇宙研究機構, 特任助教 (90573030)
• Co-Investigator(Renkei-kenkyūsha): ARIMOTO Nobuo 国立天文台, ハワイ観測所, 教授 (60242096) ; SUGIYAMA Naoshi 名古屋大学, 理学研究科, 教授 (70222057) ; ICHIKAWA Takashi 東北大学, 理学研究科, 教授 (80212992) ; NAGAO Tohru 愛媛大学, 宇宙進化研究センター, 教授 (00508450)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: Interstellar medium / star formation / galaxy evolution

Outline of Final Research Achievements

We have carried out a comprehensive study of 1500 star-forming galaxies at z ~ 1.6 using Subaru. The near-infrared spectrograph FMOS provided the means to efficiently detect key rest-frame optical emission lines for a large sample of galaxies. Prior to this study, no such sample of galaxies with these measurements had existed. As a result, we are able to establish how the physical properties of star-forming galaxies at high redshift relate to those in the local (z ~ 0) Universe hence provide a characterization their evolution with cosmic time. In particular, this spectroscopic data set allowed us to measure the rates of forming new stars, presence of Active Galactic Nuclei, properties of starbursts, and physical conditions of the interstellar medium including the amount of dust obscuration, level of chemical enrichment, ionization state of the gas and large-scale distribution of galaxies.

Free Research Field

ovservational astoronomy