The ALHAMBRA survey: 2-D analysis of the stellar populations in massive early-type galaxies at z < 0.3

Abstract

We present a technique that permits the analysis of stellar population gradients in a relatively low cost way compared to IFU surveys analyzing a vastly larger samples as well as out to larger radii. We developed a technique to analyze unresolved stellar populations of spatially resolved galaxies based on photometric multi-filter surveys. We derived spatially resolved stellar population properties and radial gradients by applying a Centroidal Voronoi Tesselation and performing a multi-color photometry SED fitting. This technique has been applied to a sample of 29 massive (M${}_{\star }$ > 10${}^{10.5}$ M${}_{\odot }$), early-type galaxies at $z$ < 0.3 from the ALHAMBRA survey. We produced detailed 2D maps of stellar population properties (age, metallicity and extinction). Radial structures have been studied and luminosity-weighted and mass-weighted gradients have been derived out to 2 - 3.5 R${}_{\mathrm{eff}}$. We find the gradients of early-type galaxies to be on average flat in age ($\nabla$log Age${}_{\mathrm{L}}$ = 0.02 $\pm$ 0.06 dex/R${}_{\mathrm{eff}})$ and negative in metallicity ($\nabla$[Fe/H]${}_{\mathrm{L}}$ = - 0.09 $\pm$ 0.06 dex/R${}_{\mathrm{eff}}$). Overall, the extinction gradients are flat ($\nabla$A${}_{\mathrm{v}}$ = - 0.03 $\pm$ 0.09 mag/R${}_{\mathrm{eff}}$ ) with a wide spread. These results are in agreement with previous studies that used standard long-slit spectroscopy as well as with the most recent integral field unit (IFU) studies. According to recent simulations, these results are consistent with a scenario where early-type galaxies were formed through major mergers and where their final gradients are driven by the older ages and higher metallicity of the accreted systems. We demonstrate the scientific potential of multi-filter photometry to explore the spatially resolved stellar populations of local galaxies and confirm previous spectroscopic trends from a complementary technique.

arXiv comment25 pages, 18 figures, accepted for publication in A&A

References in corpus (80)

• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• Stellar population synthesis at the resolution of 2003
• The Sloan Digital Sky Survey: Technical Summary
• Galactic Stellar and Substellar Initial Mass Function
• On the variation of the Initial Mass Function
• Correcting for the Effects of Interstellar Extinction
• The 2dF Galaxy Redshift Survey: Spectra and redshifts
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• New Insight on Galaxy Formation and Evolution from Keck Spectroscopy of the Hawaii Deep Fields
• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• The ages and metallicities of galaxies in the local universe
• The Atlas3D project -- I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
• Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release
• Minor mergers and the size evolution of elliptical galaxies
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• The SAURON project. II. Sample and early results
• Resolved stellar mass maps of galaxies. I: method and implications for global mass estimates
• UV-extended E-MILES stellar population models: young components in massive early-type galaxies
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• The SAMI Galaxy Survey: instrument specification and target selection
• The COMBO-17 Survey: Evolution of the Galaxy Luminosity Function from 25,000 Galaxies with 0.2<z<1.2
• The cosmological size and velocity dispersion evolution of massive early-type galaxies
• Stellar population models at high spectral resolution
• The SAURON project - XVII. Stellar population analysis of the absorption line strength maps of 48 early-type galaxies
• UV-optical colours as probes of early-type galaxy evolution
• 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
• Star Formation in Galaxy Mergers with Realistic Models of Stellar Feedback & the Interstellar Medium
• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations
• Spatially resolved spectroscopy of Coma cluster early -- type galaxies: III. The stellar population gradients
• Ultradeep Near-Infrared ISAAC Observations of the HDF-S: Observations, Reduction, Multicolor Catalog, and Photometric Redshifts
• The DiskMass Survey. I. Overview
• Structure of Disk Dominated Galaxies: II. Color Gradients and Stellar Population Models
• Stellar Population gradients in galaxy discs from the CALIFA survey
• The star formation history of CALIFA galaxies: Radial structures
• Star formation history of barred disc galaxies
• Constraining Sub-Grid Physics with High-Redshift Spatially-Resolved Metallicity Distributions
• Spatially resolved spectroscopy of early-type galaxies over a range in mass
• The ALHAMBRA Project: A large area multi medium-band optical and NIR photometric survey
• Age and metallicity gradients in early-type galaxies: A dwarf to giant sequence
• Early-type galaxies at large galactocentric radii - II. Metallicity gradients, and the [Z/H]--mass, [alpha/Fe]--mass relations
• Stellar Population and Kinematic Profiles in Spiral Bulges & Disks: Population Synthesis of Integrated Spectra
• SHARDS: an optical spectro-photometric survey of distant galaxies
• Color and stellar population gradients in galaxies. Correlation with mass
• Optical and Near-Infrared Color Profiles in Nearby Early-Type Galaxies and The Implied Age and Metallicity Gradients
• SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
• The XMM-Newton serendipitous ultraviolet source survey catalogue
• The ALHAMBRA Survey: Bayesian Photometric Redshifts with 23 bands for 3 squared degrees
• 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
• P-MaNGA: Full spectral fitting and stellar population maps from prototype observations
• The effect of metal enrichment and galactic winds on galaxy formation in cosmological zoom simulations
• P-MaNGA: Gradients in Recent Star Formation Histories as Diagnostics for Galaxy Growth and Death
• Spatially resolved kinematics and stellar populations of brightest cluster and group galaxies
• Stellar populations of early-type galaxies in different environments III. Line-strength gradients
• Radial distribution of stars, gas and dust in SINGS galaxies. III. Modeling the evolution of the stellar component in galaxy disks
• How young are early-type cluster galaxies ? Quantifying the young stellar component in a rich cluster at z=0.41
• Missing Stellar Mass in SED Fitting: Spatially Unresolved Photometry can Underestimate Galaxy Masses
• Stellar population gradients in early-type cluster galaxies
• The information content of stellar halos: Stellar population gradients and accretion histories in early-type Illustris galaxies
• Color Gradients in Early-type Galaxies: Dependence on Environment and Redshift
• The formation of the [alpha/Fe] radial gradients in the stars of elliptical galaxies
• Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library
• The spatially resolved stellar populations of isolated early-type galaxies
• Near-IR Galaxy Counts and Evolution from the Wide-Field ALHAMBRA survey
• From outside-in to inside-out: galaxy assembly mode depends on stellar mass
• SPIDER - IV. Optical and NIR color gradients in Early-type galaxies: New Insights into Correlations with Galaxy Properties
• The early-type galaxies NGC 1407 and NGC 1400 - II: star formation and chemical evolutionary history
• Exploring the Star Formation History of Elliptical Galaxies: Beyond Simple Stellar Populations with a New Estimator of Line Strengths
• Stellar content of extremely red quiescent galaxies at z>2
• Stellar population gradients in early-type cluster galaxies with VIMOS IFU
• The ALHAMBRA photometric system
• The ALHAMBRA survey: reliable morphological catalogue of 22,051 early- and late-type galaxies
• A new tool for image analysis based on Chebyshev rational functions: CHEF functions
• The Million Optical - Radio/X-ray Associations (MORX) Catalogue
• The Lack of Structural and Dynamical Evolution of Elliptical Galaxies since z ~ 1.5: Clues from Self-Consistent Hydrodynamical Simulations
• Spectral detection of multiple stellar populations in z~1 early-type galaxies

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• The PAU Survey: Measurement of Narrow-band galaxy properties with Approximate Bayesian Computation
• Constraining stellar population parameters from narrow band photometric surveys using convolutional neural networks
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