Vicente Estrada-Carpenter - Stellar Population Properties of Massive Quiescent Galaxies Derived from Deep Hubble Space Telescope Grism Data

Vicente Estrada-Carpenter from Texas A&M will be visiting DAWN and giving a cake talk on the 22nd of August titled; "Stellar Population Properties of Massive Quiescent Galaxies Derived from Deep Hubble Space Telescope Grism Data"

Abstract: The spectra and spectral energy distributions of galaxies encode important information about their formation. This is particularly useful to interpret the history of massive, quiescent galaxies, where star-formation is rapid and quenching occurs early, but this requires that we observe galaxies at high redshift (z>1), close to their quenching epochs. In this presentation, I will discuss work from Estrada-Carpenter et al. (2019) to measure stellar population parameters (e.g., ages, metallicities) using a forward modeling technique to model deep HST IR grism spectra of galaxies. Applied to massive galaxies at 1< z <1.8, I will show they formed ~70% of their stars prior to z(form) >3 and enriched to Solar metallicities by that time. I will also discuss new work using non-parametric star-formation histories to constrain the formation and quenching timescales of galaxies at 0.8< z <2.5 using the deep HST grism spectroscopy and photometry. I will show correlations between galaxy star-formation histories and galaxy morphology, and I will discuss the implications for the galaxies' evolution.