The evolution of radial gradients of MaNGA quiescent elliptical galaxies: inside-out quenching or outer mass growth?

Abstract

Using spatially-resolved fossil record analysis on a large sample of 'red and dead' elliptical galaxies (classical ellipticals, CLEs) from the MaNGA/SDSS-IV DR15 survey, we reconstruct the archaeological evolution of their radial gradients in mass-to-luminosity ratio ($M/L$), $g-r$ color, and specific star formation (SF) rate. We also calculate other metrics that quantify the inside-out SF quenching and external mass growth processes. The $M/L$ gradients, $\nabla {{\rm Y}}_{\star }$, are approximately flat at high look-back times ($t_{\mathrm{lb}}$), but then they become negative and steeper until an epoch, when this trend reverses. These trends are shifted to later epochs the less massive the galaxies are. Color gradients follow qualitatively similar trends. We find that these trends are mainly driven by strong inside-out quenching, without significant outer growth or structural changes overall. Our results suggest a scenario where the main progenitors of local CLE galaxies evolved quasi-passively after an early dissipative phase, but underwent radial photometric changes due to the inside-out quenching that led to the systematic decrease of $\nabla {{\rm Y}}_{\star }$ and to an increase of the light-weighted radius. The late reversing of $\nabla {{\rm Y}}_{\star }$, $t_{\mathrm{lb}}\approx 2-4$ Gyr, roughly coincides with the global quenching of the CLE galaxies. We have pushed archaeological inferences to the limit, but thanks to the large number of objects and an understanding of how the caveats and assumptions affect our results, we conclude that they offer an average description of evolutionary behaviors of CLE progenitors that is valid at least qualitatively.

17 pages, 14 figures. Submitted to MNRAS, after Referee Report

References in corpus (52)

• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• Compaction and Quenching of High-z Galaxies in Cosmological Simulations: Blue and Red Nuggets
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
• The Data Reduction Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey
• The SDSS-IV MaNGA Sample: Design, Optimization, and Usage Considerations
• Evidence for Mature Bulges and an Inside-out Quenching Phase 3 Billion Years After the Big Bang
• The Size Evolution of Star-forming and Quenched Galaxies in the IllustrisTNG simulation
• A catalogue of 2D photometric decompositions in the SDSS-DR7 spectroscopic main galaxy sample: preferred models and systematics
• SDSS-IV MaNGA: Spatially resolved star formation histories in galaxies as a function of galaxy mass and type
• Radial variations in the stellar initial mass function of early-type galaxies
• Morphology and star formation in IllustrisTNG: the build-up of spheroids and discs
• Stellar populations from spectroscopy of a large sample of quiescent galaxies at z > 1: Measuring the contribution of progenitor bias to early size growth
• The Assembly Histories of Quiescent Galaxies Since z=0.7 from Absorption Line Spectroscopy
• 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
• SDSS-IV MaNGA: pyPipe3D analysis release for 10,000 galaxies
• SDSS IV MaNGA: The global and local stellar mass assemby histories of galaxies
• SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
• SDSS-IV MaNGA: Effects of Morphology in the global and local Star Formation Main Sequences
• Connection Between Stellar Mass Distributions Within Galaxies and Quenching Since z =2
• Minor Mergers or Progenitor Bias? The Stellar Ages of Small and Large Quenched Early-Type Galaxies
• Half-mass radii of quiescent and star-forming galaxies evolve slowly from 0 < z < 2.5: implications for galaxy assembly histories
• pyFIT3D and pyPipe3D -- The new version of the Integral Field Spectroscopy data analysis pipeline
• The information content of stellar halos: Stellar population gradients and accretion histories in early-type Illustris galaxies
• SDSS-IV MaNGA: Radial Gradients in Stellar Population Properties of Early-Type and Late-Type Galaxies
• The mass, colour, and structural evolution of today's massive galaxies since z~5
• The stellar halos of ETGs in the IllustrisTNG simulations: II. Accretion, merger history, and dark halo connection
• SDSS IV MaNGA: Visual Morphological and Statistical Characterization of the DR15 sample
• Color gradients along the quiescent galaxy sequence: clues to quenching and structural growth
• Coincidence between morphology and star-formation activity through cosmic time: the impact of the bulge growth
• Galaxy Sizes Since $z=2$ from the Perspective of Stellar Mass Distribution within Galaxies
• First results from the VIRIAL survey: the stellar content of $UVJ$-selected quiescent galaxies at $1.5<z<2$ from KMOS
• Color gradients and half-mass radii of galaxies out to $z=2$ in the CANDELS/3D-HST fields: further evidence for important differences in the evolution of mass-weighted and light-weighted sizes
• HST grism spectroscopy of z~3 massive quiescent galaxies: Approaching the metamorphosis
• A galaxy classification grid that better recognises early-type galaxy morphology
• Reconstructing the Assembly of Massive Galaxies. I: The Importance of the Progenitor Effect in the Observed Properties of Quiescent Galaxies at $z\approx 2$
• The Contribution of In-situ and Ex-situ Star Formation in Early-Type Galaxies: MaNGA versus IllustrisTNG
• Unbiased Differential Size Evolution and the Inside-Out Growth of Galaxies in the Deep CANDELS GOODS Fields at $1\le z\le 7$
• SDSS-IV MaNGA: Stellar M/L gradients and the M/L-colour relation in galaxies
• MaNGIA: 10,000 mock galaxies for stellar population analysis
• Cosmological simulations of Milky Way-sized galaxies
• The bivariate gas-stellar mass distributions and the mass functions of early- and late-type galaxies at $z\sim 0$
• The evolution of compact massive quiescent and starforming galaxies derived from the $R_e-R_h$ and $M_{\mathrm{star}}-M_h$ relations
• The half mass radius of MaNGA galaxies: Effect of IMF gradients
• The differences between mass- and light-derived structural parameters over time for MaNGA Elliptical galaxies
• SDSS-IV MaNGA: When is morphology imprinted on galaxies?
• Colour gradients in cluster ellipticals at z~1.4: the hidden content of the galaxy central regions
• No Evolution in the Half-mass Radius of Milky Way-type Galaxies over the Last 10 Gyr
• CoSHA: Code for Stellar properties Heuristic Assignment -- for the MaStar stellar library
• Stellar population gradients at cosmic noon as a constraint to the evolution of passive galaxies

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