Netherlands Astronomy Conference 2025

Distant quiescent galaxies provide crucial insights into the formation of massive galaxies in the local universe, as they had already ceased star formation when the universe was only a fraction of its current age. To better understand this population, we analyze galaxies from the Heavy Metal survey consisting of 20 massive quiescent galaxies at $1.3<z<2.3$. Half of these galaxies have been observed by JWST in four photometric bands as part of the COSMOS-Web program. In this study, we use COSMOS-Web data to investigate their structural properties, colors, stellar population gradients, and mass distributions. We use GalFit to derive morphological parameters across all bands, measure half-light radii, and construct mass profiles. Additionally, We will also study their environments and assess the implications of the structural information for their dynamical mass estimates.