Deep spectroscopy of bright red massive quiescent galaxies at z~2.5-3 in COSMOS

VLT/XSHOOTER | 56.0hrs| PI - F. Valentino

We propose to observe with X-Shooter a statistical sample of 7 bright (K<21 mag), massive (M*>1e11 Msun), and quiescent (sSFR<1e-9.5/yr) galaxies at z~2.5-3 selected from the brand-new COSMOS2020 catalog. The sample encloses all the galaxies in the 2sq.deg. field fulfilling these criteria and spans a range of SED shapes consistent with different formation and quenching epochs. From the spectra, we will measure accurate redshifts, ages, stellar velocity dispersions (σ_vel), and estimate possible residual unobscured SFR and/or AGN contamination from emission lines, if present. This will allow us to reconstruct the SFH from the combined spectra+SED modeling and to directly compare them with custom mock observations extracted from simulations for a systematic analysis of the history of formation of these systems. Estimates of σ_vel will also allow for a first test for the existence dynamical scaling relations at such high redshifts.

John R. Weaver
John R. Weaver
PhD Fellow in Astrophysics

My research interests lie almost exclusively within the realm of extragalactic astrophysics and cosmology. I use state-of-the-art optical and infrared observatories and surveys to study the lives of galaxies, and how their properties change over cosmic time. This includes detailed case studies of individual galaxies, as well as statistical analyses of large survey catalogs.