A big step forward with SHARP: spatially resolved stellar population properties in passive galaxies at z > 1.5

Abstract

Understanding when and how massive quiescent galaxies (log(M*/Msun) > 10.5) assembled their stellar mass and quenched remains a central challenge in galaxy evolution. Spatially resolved stellar population measurements at z > 1.5 offer a uniquely powerful avenue to address this problem, as they can provide information on the radial variations in stellar age, metallicity, and enrichment histories in passive galaxies as they first emerge. In this work, we present a feasibility study quantifying the transformative capabilities of the proposed IFU SHARP/VESPER at the ELT for performing such radial mapping of stellar population gradients in passive galaxies at 1.5 < z < 3. Using the COSMOS-Web catalogue, we define a realistic population of massive quiescent systems at 1.5 < z < 3 and model representative compact and extended galaxies across this redshift range. Through detailed simulations with the official SHARP ETC, we derive the exposure times required to reach S/N = 10-15 per resolution element at key rest-frame optical wavelengths. Our results show that SHARP will routinely measure stellar population gradients out to 2Re for the majority of the population at z < 2.5 with integrations of about 20h, and that will reach at least Re in about 30h at z = 3. Thanks to MORFEO's MCAO and to its spatial resolution of 30mas SHARP/VESPER will also resolve the inner < 1kpc at all redshifts considered, enabling for the first time, direct tests of quenching mechanisms linked to central mass build-up, bulge growth, and structural transformation. These findings demonstrate that SHARP/VESPER will open an entirely new observational window on the early evolution of massive quiescent galaxies, providing, for the first time, statistically meaningful, spatially resolved stellar population constraints during the epoch when their stellar cores were assembled.

11 pages, published on New Astronomy in SHARP Science Book

References in corpus (38)

• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• The ages and metallicities of galaxies in the local universe
• Mass assembly in quiescent and star-forming galaxies since z=4 from UltraVISTA
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• Compaction and Quenching of High-z Galaxies in Cosmological Simulations: Blue and Red Nuggets
• Wet Disc Contraction to Galactic Blue Nuggets and Quenching to Red Nuggets
• Stellar Population Diagnostics of Elliptical Galaxy Formation
• The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies
• GRAPE-SPH Chemodynamical Simulation of Elliptical Galaxies I: Evolution of Metallicity Gradients
• Evolution of Density Profiles in High-z Galaxies: Compaction and Quenching Inside-Out
• A massive quiescent galaxy at redshift 4.658
• The VLT LEGA-C Spectroscopic Survey: The Physics of Galaxies at a Lookback Time of 7 Gyr
• A census of metals and baryons in stars in the local Universe
• A surprising abundance of massive quiescent galaxies at 3 < z < 5 in the first data from JWST CEERS
• The Kormendy relation of massive elliptical galaxies at z~1.5. Evidence for size evolution ?
• Early-type galaxies at large galactocentric radii - II. Metallicity gradients, and the [Z/H]--mass, [alpha/Fe]--mass relations
• Half-mass radii for ~7,000 galaxies at 1.0 < z < 2.5: most of the evolution in the mass-size relation is due to color gradients
• Predicting Quiescence: The Dependence of Specific Star Formation Rate on Galaxy Size and Central Density at 0.5<z<2.5
• On the survival of metallicity gradients to major dry-mergers
• High-redshift elliptical galaxies: are they (all) really compact?
• The stellar accretion origin of stellar population gradients in massive galaxies at large radii
• SPIDER VII - Revealing the Stellar Population Content of Massive Early-type Galaxies out to 8Re
• SDSS-IV MaNGA: stellar population gradients as a function of galaxy environment
• Rest-frame near-infrared sizes of galaxies at cosmic noon: objects in JWST's mirror are smaller than they appeared
• Insights into formation scenarios of massive Early-Type galaxies from spatially resolved stellar population analysis in CALIFA
• The number density of superdense early-type galaxies at 1<z<2 and the local cluster galaxies
• Sizes, Colour gradients and Resolved Stellar Mass Distributions for the Massive Cluster Galaxies in XMMUJ2235-2557 at z = 1.39
• The Rapid Build-up of Massive Early-type Galaxies. Supersolar Metallicity, High Velocity Dispersion and Young Age for an ETG at z=3.35
• Spatially Resolved Colors and Stellar Population Properties in Early-Type Galaxies at z ~ 1.5
• Cluster and field elliptical galaxies at z~1.3. The marginal role of the environment and the relevance of the galaxy central regions
• Resolved Multi-element Stellar Chemical Abundances in the Brightest Quiescent Galaxy at z $\sim$ 2
• Inverse stellar population age gradients of post-starburst galaxies at z=0.8 with LEGA-C
• VIMOS Public Extragalactic Redshift Survey (VIPERS). The distinct build-up of dense and normal massive passive galaxies
• REQUIEM-2D: A diversity of formation pathways in a sample of spatially-resolved massive quiescent galaxies at z~2
• DAWN JWST Archive: Morphology from profile fitting of over 340 000 galaxies in major fields
• Age and metal gradients in massive quiescent galaxies at $0.6\lesssim z\lesssim 1.0$: implications for quenching and assembly histories
• Ages and metallicities of quiescent galaxies: confronting broadband ($UVJ$) colours with stellar absorption lines
• Stellar population gradients at cosmic noon as a constraint to the evolution of passive galaxies