2023 Fiscal Year Final Research Report

Observational Studies on the Evolution of Protoplanetary Disks in Diverse Environments

Planned Research

PDF

Project Area	A Paradigm Shift by a New Integrated Theory of Star Formation: Exploring the Expanding Frontier of Habitable Planetary Systems in Our Galaxy
Project/Area Number	18H05441
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	Ibaraki University
Principal Investigator	MOMOSE Munetake 茨城大学, 基礎自然科学野, 教授 (10323205)
Co-Investigator(Kenkyū-buntansha)	安井千香子国立天文台, TMTプロジェクト, 助教 (00583626) 野村英子国立天文台, 科学研究部, 教授 (20397821) 武藤恭之工学院大学, 教育推進機構(公私立大学の部局等), 准教授 (20633803) 木野勝京都大学, 理学研究科, 助教 (40377932) 本田充彦岡山理科大学, 生物地球学部, 准教授 (40449369) 長田哲也京都大学, 理学研究科, 名誉教授 (80208016)
Project Period (FY)	2018-06-29 – 2023-03-31
Keywords	電波天文学 / 光学赤外線天文学 / 理論天文学 / 惑星起源・進化 / 原始惑星系円盤
Outline of Final Research Achievements	A new method of gas mass estimation has been established, and it was shown that a disk of about 10 million years has sufficient material for the formation of a gas planet. Some other disks have significant dust concentrations, suggesting that planet formation proceeds more rapidly. Thus, ALMA observations have contributed to the elucidation of diverse planet formation processes. Progress was also made in the study of water and related materials in disks. Scattered light from ice dust was detected, shedding light on the nature of dust in the surface layer of the disk. In addition to obtaining the statistics of disk lifetime in clusters with the lowest metal abundances in the Galaxy, we showed that the rate of gas dissipation from disks due to photoevaporation varies with metal abundance. In the near-infrared polarized light imager to be mounted on the Seimei Telescope, we successfully operated the first domestically produced infrared image sensor used for astronomical applications.
Free Research Field	天文学
Academic Significance and Societal Importance of the Research Achievements	将来の一般的な惑星形成論の確立に向け，ALMAや赤外線望遠鏡を用いた天文観測と理論研究を両輪とする学際的研究がさらに深められるような基盤を得た。国内の大型装置であるせいめい望遠鏡の強化は将来の教育・人材育成に寄与する。さらに国内製造のイメージングセンサーの新たな用途での活用は，天文学だけでなく様々な用途での波及効果が期待できる。