No direct coupling between bending of galaxy disc stellar age and light profiles

Abstract

We study the stellar properties of 44 face-on spiral galaxies from the Calar Alto Legacy Integral Field Area survey via full spectrum fitting techniques. We compare the age profiles with the surface brightness distribution in order to highlight differences between profile types (type I, exponential profile; and II, down-bending profile). We observe an upturn ("U-shape") in the age profiles for 17 out of these 44 galaxies with reliable stellar information up to their outer parts. This "U-shape" is not a unique feature for type II galaxies but can be observed in type I as well. These findings suggest that the mechanisms shaping the surface brightness and stellar population distributions are not directly coupled. This upturn in age is only observable in the light-weighted profiles while it flattens out in the mass-weighted profiles. Given recent results on the outer parts of nearby systems and the results presented in this Letter, one of the most plausible explanations for the age upturn is an early formation of the entire disc ($\sim$~10~Gyr ago) followed by an inside-out quenching of the star formation.

arXiv comment6 pages, 2 figures, Accepted for publication in MNRAS Letters (29 Oct 2015)

References in corpus (43)

• The Seventh Data Release of the Sloan Digital Sky Survey
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
• The Atlas3D project -- I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
• Radial Mixing in Galactic Discs
• Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
• The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
• Star formation thresholds and galaxy edges: why and where
• A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA
• Beyond Inside-Out Growth: Formation and Evolution of Disk Outskirts
• The structure of galactic disks: Studying late-type spiral galaxies using SDSS
• The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies
• Stellar Content from high resolution galactic spectra via Maximum A Posteriori
• Reconstructing the Subsurface Three-Dimensional Magnetic Structure of A Solar Active Region Using SDO/HMI Observations
• CALIFA: a diameter-selected sample for an integral field spectroscopy galaxy survey
• CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release
• The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
• CALIFA, the Calar Alto Legacy Integral Field Area survey. III. Second public data release
• Anti-Truncation of Disks in Early-Type Barred Galaxies
• Stellar Population gradients in galaxy discs from the CALIFA survey
• Evolution of Galactic Discs: Multiple Patterns, Radial Migration and Disc Outskirts
• STEllar Content and Kinematics from high resolution galactic spectra via Maximum A Posteriori
• The star formation history of CALIFA galaxies: Radial structures
• Color Profiles of Spiral Galaxies: Clues on Outer-Disk Formation Scenarios
• On the Formation of Galactic Thick Disks
• Integral field spectroscopy of a sample of nearby galaxies: II. Properties of the H ii regions
• Star formation history of barred disc galaxies
• The Origin of the Light Distribution in Spiral Galaxies
• The Origin of the Density Distribution of Disk Galaxies: A New Problem for the Standard Model of Disk Formation
• Outside-in Shrinking of the Star-forming Disk of Dwarf Irregular Galaxies
• NGC 300: an extremely faint, outer stellar disk observed to 10 scale lengths
• Radial Mixing in Galactic Disks: The Effects of Disk Structure and Satellite Bombardment
• Antitruncated Stellar Disks via Minor Mergers
• Outer-Disk Populations in NGC 7793: Evidence for Stellar Radial Migration
• The Nature and Origin of Substructure in the Outskirts of M31 -- II. Detailed Star Formation Histories
• The Star Formation History and Dust Content in the Far Outer Disc of M31
• Spatially Resolved Spectroscopic Star Formation Histories of Nearby Disks: Hints of Stellar Migration
• The Structure and Stellar Content of the Outer Disks of Galaxies: A New View from the Pan-STARRS1 Medium Deep Survey
• Stellar Populations and Radial Migrations in Virgo Disk Galaxies
• Properties of simulated Milky Way-mass galaxies in loose group and field environments
• How to bend galaxy disc profiles: the role of halo spin
• The truncation of stellar discs: the magnetic hypothesis

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• CALIFA, the Calar Alto Legacy Integral Field Area survey: IV. Third Public data release
• Spatially-Resolved Spectroscopic Properties of Low-Redshift Star-Forming Galaxies
• Shape of the oxygen abundance profiles in CALIFA face-on spiral galaxies
• Two-dimensional multi-component photometric decomposition of CALIFA galaxies
• The Dragonfly Nearby Galaxies Survey. I. Substantial variation in the diffuse stellar halos around spiral galaxies
• SDSS-IV MaNGA: environmental dependence of stellar age and metallicity gradients in nearby galaxies
• Spectroscopic characterisation of the stellar content of ultra diffuse galaxies
• Stellar mass distribution of S${}^4$G disk galaxies and signatures of bar-induced secular evolution
• The UK Infrared Telescope M33 monitoring project. V. The star formation history across the galactic disc
• Integrated-light analyses vs. colour-magnitude diagrams - II. Leo A, an extremely young dwarf in the Local Group
• Influence of galaxy stellar mass and observed wavelength on disc breaks in S${}^4$G, NIRS0S, and SDSS data
• Observational hints for radial migration in disc galaxies from CALIFA
• Observational constraints to boxy/peanut bulge formation time
• The continuous rise of bulges out of galactic disks
• How to bend galaxy disc profiles II: stars surfing the bar in Type-III discs
• The imprint of satellite accretion on the chemical and dynamical properties of disc galaxies
• Exponential Disks from Stellar Scattering: III. Stochastic Models
• The Role of Stellar Radial Motions in Shaping Galaxy Surface Brightness Profiles
• The SELGIFS data challenge: generating synthetic observations of CALIFA galaxies from hydrodynamical simulations
• CAVITY, Calar Alto Void Integral-field Treasury surveY and project extension
• Exponential profiles from stellar scattering off interstellar clumps and holes in dwarf galaxy discs
• SDSS-IV MaNGA: Environmental dependence of the Mgb/<Fe>-sigma_* relation for nearby galaxies
• The Impact of Stellar Migration on Disk Outskirts
• Local and global gas metallicity versus stellar age relation in MaNGA galaxies
• The AMIGA sample of isolated galaxies. XIV. Disc breaks and interactions through ultra-deep optical imaging
• CLUES about M33: the reversed radial stellar age gradient in the outskirts of Triangulum galaxy
• New Constraints on the Origin of Surface Brightness Profile Breaks of Disk Galaxies from MaNGA
• Outskirts of Nearby Disk Galaxies: Star Formation and Stellar Populations
• Radial stellar populations of AGN-host dwarf galaxies in SDSS-IV MaNGA survey
• Spotting the differences between active and non-active twin galaxies on kpc-scales. A pilot study
• A study of outer disk stellar populations of face-on star-forming galaxies in SDSS-IV MaNGA: causes of H$\alpha$ deficiency
• Revisiting the structure of galactic disks with deep imaging
• Exploring the outskirts of the EAGLE disc galaxies
• Dynamical modelling of galactic disc outskirts
• Using the EAGLE simulations to elucidate the origin of disc surface brightness profile breaks as a function of mass and environment