The Evolution of Galaxy Structure in 3D


The evolutionary histories of galaxies leave an imprint on their structure. A complete understanding of the physical mechanisms behind galaxy evolution relies on observing galaxy structure back to earlier cosmic times. This talk will present my observation work on the 3D shapes of quiescent galaxies (QGs, part 1) and star-forming galaxies (SFGs, part 2) based on their projected shapes seen from random viewing angles, using a wedding cake of multi-wavelength photometric surveys (KiDS+VIKING, COSMOS2020) and high image quality surveys (HSC-SSP, 3D-DASH, CANDELS) complementary in area and depth, covering the redshift range 0<z<2.5. Finally, I will discuss a few questions prompted by the investigation and briefly introduce the concept of SE3D, an advanced model jointly considering panchromatic SED and multi-band imaging, motivated by the ongoing observational surveys using the James Webb Space Telescope (JWST) as well as (sub)mm interferometers such as ALMA and NOEMA.

Dr. Junkai Zhang (张骏凯), Tsinghua University
Shu Qi meeting room
Tuesday, November 28, 2023 - 1:30PM to Tuesday, November 28, 2023 - 2:30PM