The Size Evolution of Elliptical Galaxies

Abstract

Recent work has suggested that the amplitude of the size mass relation of massive early type galaxies evolves with redshift. Here we use a semi-analytical galaxy formation model to study the size evolution of massive early type galaxies. We find this model is able to reproduce the amplitude of present day amplitude and slope of the relation between size and stellar mass for these galaxies, as well as its evolution. The amplitude of this relation reflects the typical compactness of dark halos at the time when most of the stars are formed. This link between size and star formation epoch is propagated in galaxy mergers. Mergers of high or moderate mass ratio (less than 1:3) become increasingly important with increasing present day stellar mass for galaxies more massive than $10^{11.4}{M}_{\odot }$. At lower masses, low mass ratio mergers play a more important role. In situ star formation contribute more to the size growth than it does to stellar mass growth. We also find that, for ETGs identified at $z=2$, minor mergers dominate subsequent growth both for stellar mass and in size, consistent with earlier theoretical results.

arXiv comment11 pages, 8 figures, 1 table, submitted to MNRAS

References in corpus (53)

• Galactic Stellar and Substellar Initial Mass Function
• Simulating the joint evolution of quasars, galaxies and their large-scale distribution
• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• Populating a cluster of galaxies - I. Results at z=0
• Hierarchical Galaxy Formation
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• Gasdynamics and Starbursts in Major Mergers
• The hierarchical formation of the brightest cluster galaxies
• From dwarf spheroidals to cDs: Simulating the galaxy population in a LCDM cosmology
• The size distribution of galaxies in the Sloan Digital Sky Survey
• Minor mergers and the size evolution of elliptical galaxies
• Clustering of Galaxies in a Hierarchical Universe: I. Methods and Results at z=0
• Detection of quiescent galaxies in a bicolor sequence from z=0-2
• Resolving Cosmic Structure Formation with the Millennium-II Simulation
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• The Growth of Massive Galaxies Since z=2
• Confirmation of the remarkable compactness of massive quiescent galaxies at z~2.3: early-type galaxies did not form in a simple monolithic collapse
• The Nature of High-Redshift Galaxies
• The Relation Between Compact, Quiescent High Redshift Galaxies and Massive Nearby Elliptical Galaxies: Evidence for Hierarchical, Inside-Out Growth
• The Evolution of Galaxy Structure over Cosmic Time
• Can Minor Merging Account for the Size Growth of Quiescent Galaxies? New Results from the CANDELS Survey
• Size evolution of the most massive galaxies at 1.7<z<3 from GOODS NICMOS survey imaging
• Formation of early-type galaxies from cosmological initial conditions
• The cosmological size and velocity dispersion evolution of massive early-type galaxies
• How do minor mergers promote inside-out growth of ellipticals, transforming the size, density profile and dark matter fraction?
• Recent Structural Evolution of Early-Type Galaxies: Size Growth from z=1 to z=0
• The evolving relations between size, mass, surface density, and star formation in 3x10^4 galaxies since z=2
• Extremely compact massive galaxies at z~1.4
• Galaxy growth in the concordance $\Lambda$CDM cosmology
• The Effects of Gas on Morphological Transformation in Mergers: Implications for Bulge and Disk Demographics
• The sizes, masses and specific star-formation rates of massive galaxies at 1.3<z<1.5: strong evidence in favour of evolution via minor mergers
• Mass-to-Light Ratios of Field Early-Type Galaxies at z~1 from Ultra-Deep Spectroscopy: Evidence for Mass-dependent Evolution
• The DEEP3 Galaxy Redshift Survey: The Impact of Environment on the Size Evolution of Massive Early-type Galaxies at Intermediate Redshift
• Dissecting the size evolution of elliptical galaxies since z~1: puffing up vs minor merging scenarios
• How well can we really estimate the stellar masses of galaxies from broadband photometry?
• Red Nuggets at High Redshift: Structural Evolution of Quiescent Galaxies Over 10 Gyr of Cosmic History
• Size Evolution of Spheroids in a Hierarchical Universe
• The relative abundance of compact and normal massive early-type galaxies and its evolution from redshift z~2 to the present
• Constraining The Assembly Of Normal And Compact Passively Evolving Galaxies From Redshift z=3 To The Present With CANDELS
• Dissipationless Mergers of Elliptical Galaxies and the Evolution of the Fundamental Plane
• The Evolution of Early-type Red Galaxies with the GEMS Survey: Luminosity-size and Stellar Mass-size Relations Since z=1
• Stellar mass estimates in early-type galaxies: procedures, uncertainties and models dependence
• The evolution of early-type galaxies at z~1 from the K20 survey
• Galaxy morphology in the LambdaCDM cosmology
• Mild Velocity Dispersion Evolution of Spheroid-like Massive Galaxies since z~2
• The Growth in Size and Mass of Cluster Galaxies since z=2
• Fossil Evidence for the Two-phase Formation of Elliptical Galaxies
• Environmental dependence of bulge-dominated galaxy sizes in hierarchical models of galaxy formation. Comparison with the local Universe
• Constraining the star formation and the assembly histories of normal and compact early-type galaxies at 1<z<2
• The Size Evolution of Passive Galaxies: Observations from the Wide Field Camera 3 Early Release Science Program
• Predicting the Properties of the Remnants of Dissipative Galaxy Mergers
• On the central stellar mass density and the inside-out growth of early-type galaxies
• Modeling the Ages and Metallicities of Early-Type Galaxies in Fundamental Plane Space

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• The Frontier Fields Lens Modeling Comparison Project
• A Universe of Ultra-Diffuse Galaxies: Theoretical Predictions from $\Lambda$CDM Simulations
• Galaxy structure with strong gravitational lensing: decomposing the internal mass distribution of massive elliptical galaxies
• The cosmic assembly of stellar haloes in massive Early-Type Galaxies
• Dark-ages reionization and galaxy formation simulation--VII. The sizes of high-redshift galaxies
• Massive Quiescent Galaxies at z>3 in The Millennium Simulation Populated by A Semi-analytic Galaxy Formation Model
• On the influence of environment on star forming galaxies
• The spatial distribution of satellites in galaxy clusters
• Early-type galaxy density profiles from IllustrisTNG: III. Effects on outer kinematic structure
• The Formation and Evolution of Massive Galaxies