A new framework for understanding the evolution of early-type galaxies

Abstract

We have recently suggested that the combination of the scalar virial theorem ($M_s\sim R_e{\sigma }^2$) and the $L=L_0^{\prime }{\sigma }^{\beta }(t)$ law, with L'_0 and $\beta$ changing from galaxy to galaxy (and with time), can provide a new set of equations valid for investigating the evolution of early-type galaxies (ETGs) (Donofrio & Chiosi, 2022). These equations are able to account for the tilt of the Fundamental Plane (FP) and to explain the observed distributions of ETGs in all its projections. In this paper we analyze the advantages offered by those equations, derive the $\beta$ and $L_0^{\prime }$ parameters for real and simulated galaxies, and demonstrate that, according to the value of $\beta$, galaxies can move only along some permitted directions in the FP projections. Then, we show that simple galaxy models that grow in mass by infall of gas and form stars with a star formation rate depending on the stellar velocity dispersion nicely reproduce the observed distributions of ETGs in the FP projections and yield $\beta$s that agree with the measured ones. We derive the mutual relationships among the stellar mass, effective radius, velocity dispersion, and luminosity of ETGs as a function of $\beta$ and calculate the coefficients of the FP. Then, using the simple infall models, we show that the star formation history of ETGs is compatible with the $\sigma$-dependent star formation rate, and that both positive and negative values of $\beta$ are possible in a standard theory of galaxy evolution. The parameter $\beta (t)$ offers a new view of the evolution of ETGs. In brief, i) it gives a coherent interpretation of the FP and of the motions of galaxies in its projections; ii) it is the fingerprint of their evolution; iii) it measures the degree of virialization of ETGs; iv) and finally it allows us to infer their evolution in the near past.

arXiv comment25 pages, 30 figures, 5 tables

References in corpus (78)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Simulating Galaxy Formation with the IllustrisTNG Model
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• 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
• Properties of galaxies reproduced by a hydrodynamic simulation
• The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the fundamental plane of elliptical and lenticular galaxies
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• The Sloan Lens ACS Survey. X. Stellar, Dynamical, and Total Mass Correlations of Massive Early-type Galaxies
• The Fundamental Plane for cluster E and S0 galaxies
• The Illustris Simulation: Public Data Release
• The optical morphologies of galaxies in the IllustrisTNG simulation: a comparison to Pan-STARRS observations
• Scaled solar tracks and isochrones in a large region of the Z-Y plane I. From the ZAMS to the TP-AGB end for 0.15 - 2.5 Mo stars
• Early-type galaxies in the SDSS. III. The Fundamental Plane
• The Fundamental Scaling Relations of Elliptical Galaxies
• The Fundamenal Plane in CL0024 at z=0.4: Implications for the Evolution of the Mass-to-Light Ratio
• An Older, More Quiescent Universe from Panchromatic SED Fitting of the 3D-HST Survey
• Global Relationships Among the Physical Properties of Stellar Systems
• Scaled solar tracks and isochrones in a large region of the Z-Y plane. II. From 2.5 to 20 solar masses
• The Sloan Lens ACS Survey. VII. Elliptical Galaxy Scaling Laws from Direct Observational Mass Measurements
• WINGS: a WIde-field Nearby Galaxy-cluster Survey. I - Optical imaging
• Galaxy Morphology and Star Formation in the Illustris Simulation at z=0
• A catalogue of 2D photometric decompositions in the SDSS-DR7 spectroscopic main galaxy sample: preferred models and systematics
• The Tilt of the Fundamental Plane of Elliptical Galaxies: I. Dynamical and Structural Effects
• Weak homology of elliptical galaxies
• How Well Can We Measure the Stellar Mass of a Galaxy: The Impact of the Assumed Star Formation History Model in SED Fitting
• Galaxy merging, the Fundamental Plane of elliptical galaxies, and the Mbh-sigma relation
• The Tilt of the Fundamental Plane: Three-quarters Structural Nonhomology, One-quarter Stellar Population
• WINGS-SPE Spectroscopy in the WIde-field Nearby Galaxy-cluster Survey
• Cosmic Evolution of Size and Velocity Dispersion for Early Type Galaxies
• The Star Formation Epoch of the Most Massive Early-Type Galaxies
• Dissecting the Red Sequence--II. Star Formation Histories of Early-Type Galaxies Throughout the Fundamental Plane
• Central mass-to-light ratios and dark matter fractions in early-type galaxies
• The Fundamental Plane of Ellipticals: I. The Dark Matter Connection
• Dissecting the Red Sequence - III. Mass-to-Light Variations in 3D Fundamental Plane Space
• The 6dF Galaxy Survey: The Near-Infrared Fundamental Plane of Early-Type Galaxies
• Dependence of the Fundamental Plane Scatter on Galaxy Age
• WINGS: A WIde-field Nearby Galaxy-cluster Survey. II. Deep optical photometry of 77 nearby clusters
• OmegaWINGS: OmegaCAM@VST observations of WINGS galaxy clusters
• A spectrophotometric model applied to cluster galaxies: the WINGS dataset
• A calibration of the stellar mass fundamental plane at z ~ 0.5 using the micro-lensing induced flux ratio anomalies of macro-lensed quasars
• Galaxies in the Illustris simulation as seen by the Sloan Digital Sky Survey - II: Size-luminosity relations and the deficit of bulge-dominated galaxies in Illustris at low mass
• The Hubble Sequence at $z\sim 0$ in the IllustrisTNG simulation with deep learning
• A More Fundamental Plane
• OmegaWINGS: spectroscopy in the outskirts of local clusters of galaxies
• WINGS Data Release: a database of galaxies in nearby clusters
• The concentration-mass relation of clusters of galaxies from the OmegaWINGS survey
• The Fundamental Plane of Early Type Galaxies in Nearby Clusters from the WINGS Database
• SPIDER - III. Environmental Dependence of the Fundamental Plane of Early-type Galaxies
• WINGS: a WIde-field nearby Galaxy-cluster survey III. Deep near-infrared photometry of 28 nearby clusters
• Ultraviolet Properties of Primeval Galaxies: Theoretical Models from Stellar Population Synthesis
• Measuring age, metallicity and abundance ratios from absorption line indices
• M/L and Color Evolution for A Deep Sample of M* Cluster Galaxies at z~1: The Formation Epoch and the Tilt of the Fundamental Plane
• The SAMI Galaxy Survey: stellar population and structural trends across the Fundamental Plane
• The fundamental plane of isolated early-type galaxies
• The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4<z<1.6$
• The Star Formation Histories of Red-Sequence Galaxies, Mass-to-Light Ratios and the Fundamental Plane
• The Fundamental Plane in the LEGA-C Survey: unraveling the $M/L$ variations of massive star-forming and quiescent galaxies at $z\sim 0.8$
• Formation and evolution of early-type galaxies. II. Models with quasi-cosmological initial conditions
• Formation and Evolution of Early-Type Galaxies. III Star formation history as a function of mass and over-density
• Toward Understanding the origin of the Fundamental Plane for Early-Type Galaxies
• Surface photometry of WINGS galaxies with GASPHOT
• Simulating the formation and evolution of galaxies: Multi-phase description of the interstellar medium, star formation, and energy feedback
• Star formation history in early-type galaxies. I. The line absorption indices diagnostics
• Enhancement of alpha-Elements in Dynamical Models of Elliptical Galaxies
• The impact of the Star Formation Histories on the SFR-M${}_{\ast }$ relation at z$\ge$2
• Mergers in Galaxy Groups. II. The Fundamental Plane of Elliptical Galaxies
• Introduction to Galactic Chemical Evolution
• The assembly of spheroid-dominated galaxies in the EAGLE simulation
• A unified scenario for the origin of spiral and elliptical galaxy structural scaling laws
• The mass-size plane of EAGLE galaxies
• Characterization of Omega-WINGS galaxy clusters. I. Stellar light and mass profiles
• Cosmic Star Formation: a simple model of the SFRD(z)
• The parallelism between galaxy clusters and early-type galaxies: I. The light and mass profiles
• The parallelism between galaxy clusters and early-type galaxies: III. The Mass-Radius Relationship
• Cosmological interpretation of the color-magnitude diagrams of galaxy clusters
• A common origin for the Fundamental Plane of quiescent and star-forming galaxies in the EAGLE simulations
• The Fundamental Plane in the hierarchical context

Cited by in corpus (1)

• The Kormendy relation of early-type galaxies as a function of wavelength in Abell S1063, MACS J0416.1-2403, and MACS J1149.5+2223