Galaxy Evolution in all Five CANDELS Fields and IllustrisTNG: Morphological, Structural, and the Major Merger Evolution to $z\sim 3$

Abstract

A fundamental feature of galaxies is their structure, yet we are just now understanding the evolution of structural properties in quantitative ways. As such, we explore the quantitative non-parametric structural evolution of 16,778 galaxies up to $z\sim 3$ in all five CANDELS fields, the largest collection of high resolution images of distant galaxies to date. Our goal is to investigate how the structure, as opposed to size, surface brightness, or mass, changes with time. In particular, we investigate how the concentration and asymmetry of light evolve in the rest-frame optical. To interpret our galaxy structure measurements, we also run and analyse 300 simulation realisations from IllustrisTNG to determine the timescale of mergers for the CAS system. We measure that from $z=0-3$, the median asymmetry merger timescale is $0.56_{-0.18}^{+0.23}$Gyr, and find it does not vary with redshift. Using this data, we find that galaxies become progressively asymmetric at a given mass at higher redshifts and we derive merger rates which scale as $\sim (1+z{)}^{1.87\pm 0.04}$Gyr${}^{-1}$, which agrees well with recent machine learning and galaxy pair approaches, removing previous inconsistencies. We also show that far-infrared selected galaxies that are invisible to \textit{HST} have a negligible effect on our measurements. We also find that galaxies are more concentrated at higher redshifts. We interpret this as a sign of how their formation occurs from a smaller initial galaxy that later grows into a larger one through mergers, consistent with the size growth of galaxies from `inside-out', suggesting that the centres are the oldest parts of most galaxies.

arXiv commentSubmitted to ApJ. 26 pages, 19 figures

References in corpus (65)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
• CANDELS: The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey - The Hubble Space Telescope Observations, Imaging Data Products and Mosaics
• EAZY: A Fast, Public Photometric Redshift Code
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• Galaxy Harassment and the Evolution of Clusters of Galaxies
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• Galaxy Zoo : Morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• First results from the IllustrisTNG simulations: radio haloes and magnetic fields
• First Results from the TNG50 Simulation: Galactic outflows driven by supernovae and black hole feedback
• First Results from the TNG50 Simulation: The evolution of stellar and gaseous disks across cosmic time
• The Relationship Between Stellar Light Distributions of Galaxies and their Formation Histories
• A New Non-Parametric Approach to Galaxy Morphological Classification
• The merger rate of galaxies in the Illustris Simulation: a comparison with observations and semi-empirical models
• Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies
• Strong size evolution of the most massive galaxies since z~2
• The Asymmetry of Galaxies: Physical Morphology for Nearby and High Redshift Galaxies
• The Evolution of Galaxy Structure over Cosmic Time
• Size evolution of the most massive galaxies at 1.7<z<3 from GOODS NICMOS survey imaging
• Galaxy Merger Morphologies and Time-Scales from Simulations of Equal-Mass Gas-Rich Disc Mergers
• Structural and Photometric Classification of Galaxies - I. Calibration Based on a Nearby Galaxy Sample
• SKIRT: an Advanced Dust Radiative Transfer Code with a User-Friendly Architecture
• The mass evolution of the first galaxies: stellar mass functions and star formation rates at $4<z<7$ in the CANDELS GOODS-South field
• Stellar masses from the CANDELS survey: the GOODS-South and UDS fields
• The Greater Impact of Mergers on the Growth of Massive Galaxies: Implications for Mass Assembly and Evolution Since z~1
• A dominant population of optically invisible massive galaxies in the early Universe
• The Luminosity, Stellar Mass, and Number Density Evolution of Field Galaxies of Known Morphology from z = 0.5 - 3
• The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
• Early and Rapid Merging as a Formation Mechanism of Massive Galaxies: Empirical Constraints
• Optical colours and spectral indices of $z=0.1$ EAGLE galaxies with 3D dust radiative transfer code SKIRT
• The Effect of Gas Fraction on the Morphology and Time-scales of Disc Galaxy Mergers
• Observational constraints on the merger history of galaxies since $z\approx 6$: Probabilistic galaxy pair counts in the CANDELS fields
• The Structures of Distant Galaxies - III: The Merger History of over 20,000 Massive Galaxies at z < 1.2
• The structures and total (minor + major) merger histories of massive galaxies up to z = 3 in the HST GOODS NICMOS Survey: A possible solution to the size evolution problem
• The Redshift and Mass Dependence on the Formation of The Hubble Sequence at z>1 from CANDELS/UDS
• High redshift JWST predictions from IllustrisTNG: Dust modelling and galaxy luminosity functions
• CANDELS Visual Classifications: Scheme, Data Release, and First Results
• Resolving the Discrepancy of Galaxy Merger Fraction Measurements at z ~ 0 - 3
• Far-infrared and dust properties of present-day galaxies in the EAGLE simulations
• A consistent measure of the merger histories of massive galaxies using close-pair statistics I: Major mergers at $z<3.5$
• Optimising Automatic Morphological Classification of Galaxies with Machine Learning and Deep Learning using Dark Energy Survey Imaging
• GPz: Non-stationary sparse Gaussian processes for heteroscedastic uncertainty estimation in photometric redshifts
• Galaxy And Mass Assembly (GAMA): Refining the Local Galaxy Merger Rate using Morphological Information
• Mass assembly and morphological transformations since $z\sim 3$ from CANDELS
• Galaxy Populations and Evolution in Clusters II: Defining Cluster Populations
• Massive Close Pairs Measure Rapid Galaxy Assembly in Mergers at High Redshift
• Galaxy Merger Rates up to z $\sim$ 3 using a Bayesian Deep Learning Model $-$ A Major-Merger classifier using IllustrisTNG Simulation data
• The Bulge-Disk Decomposed Evolution of Massive Galaxies at 1<z<3 in CANDELS
• The Size Evolution of Star-forming Galaxies Since z~7 Using ZFOURGE
• A Surprisingly High Pair Fraction for Extremely Massive Galaxies at z ~ 3 in the GOODS NICMOS Survey
• The Galaxy Major Merger Fraction to z ~ 1
• Accurate Identification of Galaxy Mergers with Imaging
• New criteria for the selection of galaxy close pairs from cosmological simulations: evolution of the major and minor merger fraction in MUSE deep fields
• FERENGI: Redshifting galaxies from SDSS to GEMS, STAGES and COSMOS
• Tracing galaxy populations through cosmic time: A critical test of methods for connecting the same galaxies between different redshifts at $z<3$
• Quantifying Non-parametric Structure of High-redshift Galaxies with Deep Learning
• Unbiased Differential Size Evolution and the Inside-Out Growth of Galaxies in the Deep CANDELS GOODS Fields at $1\le z\le 7$
• The Evolution of Galaxies at Constant Number Density: A Less Biased View of Star Formation, Quenching, and Structural Formation
• Surface Brightness Evolution of Galaxies in the CANDELS GOODS Fields up to $z\sim 6$: High-z Galaxies are Unique or Remain Undetected
• The Impact of Redshift on Galaxy Morphometric Classification: case studies for SDSS, DES, LSST and HST with Morfometryka
• Stellar populations, stellar masses and the formation of galaxy bulges and discs at $z<3$ in CANDELS

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