I am a first-year PhD student at the University of Tsukuba and a member of the Theoretical Astrophysics Group.
I study how the structure and chemical composition of galaxies change over time.
I plan to expand this research to explore galactic habitable zones in the context of hierarchical mergers predicted by the Lambda Cold Dark Matter model.
Quantum Physics and Mathematical Sciences, Supervisor: Prof. Yuji Satoh
Theoretical Astrophysics Group, Supervisor: Assoc. Prof. Masao Mori
Theoretical Astrophysics Group, Supervisor: Assoc. Prof. Masao Mori
Where Do We Come From? What Are We? Where Are We Going?
You have imagined these questions once, haven't you?
I want to clarify these questions via numerical simulations of galaxy formation and evolution in supercomputer systems.
I focus on the dynamical and chemical evolution of a dwarf galaxy that collided with the Andromeda Galaxy about 1 billion years ago.
M. Yamaguchi, M. Mori, T. Kirihara, Y. Miki, I. Ogami, M. Chiba, Y. Komiyama, M. Tanaka, “Simultaneous Formation of the Andromeda Giant Southern Stream and the Substructures in the Andromeda Halo”, Publications of the Astronomical Society of Japan, Advance online publication. （https://doi.org/10.1093/pasj/psaf029, arXiv:2503.21217）
M. Yamaguchi, M. Mori, A. Hotta, K. Otaki, ” Formation of the metal gradients in the Andromeda Giant Stellar Stream”, 2024, Springer Proceedings in Physics, to be accepted
M. Yamaguchi, A. Hotta, K. Otaki, M. Mori, “Formation of the metal gradients in the Andromeda Giant Stream”, 34th IUPAP Conference on Computational Physics, Poster, Kobe, August 2023
M. Yamaguchi, M. Mori, K. Otaki, T. Kirihara, “Formation of the Andromeda Giant Stream and the 10 kpc Ring in the Andromeda Galaxy”, 15th symposium on Discovery, Fusion, Creation of New Knowledge by Multidisciplinary Computational Sciences, Poster, Tsukuba, October 2023
M. Yamaguchi, A. Hotta, K. Otaki, M. Mori, “Formation of the Andromeda Giant Stream and chemical evolution of the progenitor galaxy”, International Conference on Resolving Galaxy Ecosystems Across All Scales, Oral, Hong Kong, December 2023
M. Yamaguchi, M. Mori, T. Kirihara, “Chemical evolution of the progenitor galaxy of the Andromeda Giant Southern Stream”, Dark Matter in the Universe: The Present and Future of Galactic Archeology and Near-field Cosmology, Oral, Miyagi, March 2024
山口未沙,森正夫,“Galactic Habitable Zoneに関する2本の初期論文の紹介と考察”,天文・天体物理若手夏の学校,口頭＋ポスター,東京,2023年8月
山口未沙,堀⽥彩⽔,⼤滝恒輝,森正夫,“Galaxy collisions and metal gradients of the Andromeda Giant Southern Stream”,日本天文学会秋季年会,口頭＋ポスター,名古屋,2023年9月
山口未沙,堀⽥彩⽔,⼤滝恒輝,森正夫,“⾦属量から探る矮⼩銀河のGalactic Habitable Zone〜銀河衝突を経験した銀河の化学進化を踏まえて〜”, 天体形成研究会2023,口頭,つくば,2023年11月
山口未沙,森正夫,堀⽥彩⽔,桐原崇亘,⼤滝恒輝,“Formation of the Andromeda Giant Southern Stream and metal gradients of the progenitor galaxy”,第36回理論懇シンポジウム,ポスター,弘前,2023年12月
山口未沙,森正夫,桐原崇亘,“Galaxy collisions and stellar streams in the Andromeda Galaxy: Chemical evolution of the progenitor galaxy of the Andromeda Giant Southern Stream”,日本天文学会春季年会,口頭＋ポスター,東京,2024年3月
森正夫,堀⽥彩⽔,山口未沙,⼤滝恒輝,桐原崇亘,“Galaxy collisions and stellar streams in the Andromeda Galaxy: Once and future in Andromeda”,日本天文学会春季年会,口頭,東京,2024年3月
山口未沙,森正夫,桐原崇亘,小上樹,千葉柾司,小宮山裕,田中幹人,“Formation of the Andromeda Giant Southern Stream and Eastern Extent”,日本天文学会秋季年会,口頭,兵庫,2024年9月
山口未沙,森正夫,桐原崇亘,三木洋平,小上樹,千葉柾司,小宮山裕,田中幹人,“重元素量分布で探るアンドロメダストリームとEastern Extent の形成過程”, The Violent Universe,口頭,東京,2024年9月
山口未沙,森正夫,桐原崇亘,三木洋平,小上樹,千葉柾司,小宮山裕,田中幹人,“Formation Scenarios of the Andromeda Giant Southern Stream and Eastern Extent predicted by metallicity distribution”, 天体形成研究会,口頭,つくば,2024年10月
山口未沙,森正夫,桐原崇亘,三木洋平,小上樹,千葉柾司,小宮山裕,田中幹人,“Simultaneous formation of the Andromeda Giant Southern Stream and Eastern Extent”,日本天文学会春季年会,口頭,水戸,2025年3月
山口未沙,森正夫,桐原崇亘,三木洋平,小上樹,千葉柾司,小宮山裕,田中幹人,”Simultaneous Formation of the Four Substructures in the Andromeda Halo”, ビッグデータアストロノミー2025, 口頭,つくば,2025年5月
Copyright © Misa Yamaguchi
Distributed By Themewagon