Oral Presentation

Intermediate-mass quiescent galaxies at z~3-4 observed with JWST/NIRSpec

Author(s): Riku Sato, Akio Inoue (Waseda University), Yuichi Harikane (UTokyo) and others.

Presenter: Riku Sato (Waseda University)

We present the analysis of three intermediate-mass quiescent galaxies (QGs) with stellar masses of ~10^10 Msolar at redshifts z~3–4 with JWST/NIRSpec. We confirm these target galaxies are consistent with quiescent population. Additionally, we identify these QGs to be less massive than those discovered in previous works, particularly prior to the JWST era. Two of our target galaxies exhibit the potentially-blended Halpha+[NII] emission line. We discuss whether this feature comes from an Active Galactic Nucleus (AGN) or star formation. One of the target galaxies is covered by JWST/NIRCam imaging. We reveal its disc-like profile with a Sersic index of n~1. We examine the galaxy on the size-mass relation from the literature. We discuss the importance of these intermediate quiescent galaxies in the field of galaxy evolution.