2022/11/04(Fri)
11:00 -12:00
五樓第一會議室 5F, 1st Meeting Room
視訊演講 Video Seminar [ Meeting Link / ID: 2516 360 8923 / Password: JxrPUaBP342 ]
Title
Catch in act: tracing the evolution of galaxies in transformation
Speaker
吳柏鋒助理教授 (國立台灣大學物理系) Assistant Prof. Po-Feng Wu (Department of Physics, National Taiwan University)Abstract
A fundamental constraint on studying galaxies is that we are not able to monitor individual galaxies throughout their lifetime to track the evolution. The stars in galaxies provide fossil records on the build-up processes of galaxies. I will demonstrate that with current observing facilities, we are able to track the evolution of individual galaxies from their stellar populations. The archaeological method can date the ages of galaxies and pinpoint where they are in their evolutionary process. This ability is particularly helpful to answer one of the biggest unsolved questions in galaxy evolution: what happened in galaxies when they stopped forming new stars? With the galaxy formation histories extracted from their spectra, I identify galaxies that are right in the transitioning phase. Their physical properties inform us the mechanisms that drive galaxy evolution, which validates and challenges galaxy formation theories simultaneously.
Language
演講語言 (Language): in English
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