| Title | Science Café in English “A pillar of precision cosmology in the 21st century: wide-field perturbation statistics” |
| Speaker | Chen Anqi (陈 安琪) (Kavli IPMU Project Researcher) |
| Date | Sat, July 20, 2024, 17:10 – 18:40 |
| Abstract | Cosmology is a lively growing new field in physics, emerging from the intersection between astronomy and particle physics. The subject of research in this field involves some of the most fascinating topics of our time: what is the composition of our universe, how it began, and where it goes. In this talk, I will start by introducing the currently most successful model to comprehensively explain our observation on the universe, the Lambda-CDM model, then dive into an important subfield of the probes that we use to learn about our universe, the wide-field perturbation statistics measurements on multiple messengers (cosmic microwave background, astrophysical objects …). In the end, I will present examples of how I use those kinds of measurements on the large-scale structure to learn some of the features of our universe, for example, how stable the dark matter is, and how baryonic feedbacks stir up the gravitationally formed structures.
宇宙論は、天文学と素粒子物理学から生まれた、現在ホットな新分野です。この分野で研究されているトピックには例えば、我々の宇宙は何でできているのか、どのように始まり、どこへ行くのか、などいくつも魅力的なものがあります。この講演では、まず「ラムダCDMモデル」を紹介します。「ラムダCDMモデル」はこれまでに行われてきた宇宙についての観測結果を、最も包括的に説明するモデルです。その上で、宇宙マイクロ波背景放射や天体など、宇宙についての情報を運ぶ複数の運び手（メッセンジャー）を用いた、広視野摂動統計測定を紹介します。最後に、私がこういった測定結果を用いて、どのように宇宙の特性を調べているのか－例えば、暗黒物質がどの程度安定しているのか、重力が形成した構造をバリオンフィードバックがどのようにかき混ぜているのか、を紹介します。 |
| Place | Tamarokuto Science Center |
| Capacity | 60 |
| Age to apply | 1st year junior high school student or over |
| Registration | Resistration required. First come first served basis. Application form opens at noon on 20th of June, Thursday. Registration Form |
| Remarks | Admission fee required. (Adult 520 JPY, Junior and Junior High School Student 210 JPY) Only participants are allowed in the room. |
