Invited Presentation

Death of massive galaxies: characterization of quiescent galaxies in the early Universe

Author(s): Kei Ito

Presenter: Kei Ito (The University of Tokyo)

Thanks to the recent deep observations, some massive galaxies are known to stop their star formation even just 1-2 Gyrs from the Big Bang. These early massive quiescent galaxies are likely to have obtained their stellar mass by bursty star formation within a short period and suddenly quenched. However, their statistical properties and quenching mechanisms are still unclear. In this talk, I will review the current status of surveys of quiescent galaxies at high redshift and introduce our studies to characterize massive quiescent galaxies using data from ground-based and space telescopes. Specifically, I will introduce our study on the morphological properties of quiescent galaxies using JWST/NIRCam imaging and an ongoing project to analyze JWST/NIRSpec spectra.