2 papers
astro-ph.GA2026
Evidence of radial-migration driven Galactic disc expansion with the U-shape stellar age profile
Jianhui Lian, Qinhao Shao, Yuze Zhao
Canonical theory predicts galaxies grow "inside-out", producing their observed negative radial age gradient. This picture is challenged by galaxies' `U-shaped' colour profiles -- i…
astro-ph.GA2026
Vertical Structure of Local Disk Galaxies revealed by DESI Imaging Data
Nan Chen, Jianhui Lian, Yuze Zhao
The vertical structure of galactic disks is an important probe of disk assembly history. We investigate a sample of 79 local disk galaxies within 50 Mpc using data from the DESI Le…