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Context. The Fundamental Plane (FP) relation and the distribution of early-type galaxies (ETGs) in the FP projections, cannot be easily explained in the hierarchical framework, where galaxies grow up by merging and star formation episodes.…

Astrophysics of Galaxies · Physics 2022-06-01 Mauro D'Onofrio , Cesare Chiosi

Context. The structural scaling relations (SSRs) of galaxies, i.e. the observed correlations between effective radius, effective surface intensity and velocity dispersion, are important tools for understanding how evolution proceeds. Aims.…

Astrophysics of Galaxies · Physics 2023-07-26 Mauro D'Onofrio , Cesare Chiosi

We present constraints on the formation and evolution of early-type galaxies (ETGs) with the empirical model EMERGE. The parameters of this model are adjusted so that it reproduces the evolution of stellar mass functions, specific star…

Astrophysics of Galaxies · Physics 2020-10-14 Benjamin P. Moster , Thorsten Naab , Simon D. M. White

The aim of this work is to show that the origin of the Fundamental Plane (FP) relation for early-type galaxies (ETGs) can be traced back to the existence of a fine-tuning between the average star formation rate $<SFR>$ of galaxies and their…

Astrophysics of Galaxies · Physics 2016-12-13 Mauro D'Onofrio , Stefano Cariddi , Cesare Chiosi , Emanuela Chiosi , Paola Marziani

Early-type galaxies (ETGs) are supposed to follow the virial relation $M = k_e \sigma_*^2 R_e / G$, with $M$ being the mass, $\sigma_*$ being the stellar velocity dispersion, $R_e$ being the effective radius, $G$ being Newton's constant,…

Astrophysics of Galaxies · Physics 2016-11-09 Sascha Trippe

Early-type galaxies (ETGs) show a bimodal distribution in key structural properties like stellar specific angular momentum, kinematic morphology, and nuclear surface brightness profiles. Slow rotator ETGs, mostly found in the densest…

Astrophysics of Galaxies · Physics 2025-10-17 Michele Cappellari

Early-type galaxies (ETGs) are reference systems to understand galaxy formation and evolution processes. The physics of their formation and internal dynamics are codified in well-known scaling relations. In this context, cosmological…

We present a panoramic review of several observational and theoretical aspects of the modern astrophysical research about the origin of the Fundamental Plane (FP) relation for Early-Type Galaxies (ETGs). The discussion is focused on the…

Astrophysics · Physics 2009-11-11 M. D'onofrio , T. Valentinuzzi , L. Secco , R. Caimmi , D. Bindoni

State-of-the-art integral field surveys like $\mathrm{ATLAS^{3D}}$, SLUGGS, CALIFA, SAMI, and MaNGA provide large data sets of kinematical observations of early-type galaxies (ETGs), yielding constraints on the formation of ETGs. Using the…

Astrophysics of Galaxies · Physics 2018-09-05 Felix Schulze , Rhea-Silvia Remus , Klaus Dolag , Andreas Burkert , Eric Emsellem , Glenn van de Ven

The evolution of the structural and kinematic properties of early-type galaxies (ETGs), their scaling relations, as well as their stellar metallicity and age contain precious information on the assembly history of these systems. We present…

Observations of galaxy isophotes, longs-slit kinematics and high-resolution photometry suggested a possible dichotomy between two distinct classes of E galaxies. But these methods are expensive for large galaxy samples. Instead,…

Astrophysics of Galaxies · Physics 2016-09-23 Michele Cappellari

We study the evolution of the observed correlation between central stellar velocity dispersion $\sigma_\mathrm{e}$ and stellar mass $M_*$ of massive ($M_*\gtrsim 3\times 10^{10}\,\mathrm{M_\odot}$) early-type galaxies (ETGs) out to redshift…

Astrophysics of Galaxies · Physics 2020-08-12 Carlo Cannarozzo , Alessandro Sonnenfeld , Carlo Nipoti

Early-type galaxies (ETGs) are observed to be more compact, on average, at $z \gtrsim 2$ than at $z\simeq 0$, at fixed stellar mass. Recent observational works suggest that such size evolution could reflect the similar evolution of the host…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Lorenzo Posti , Carlo Nipoti , Massimo Stiavelli , Luca Ciotti

Based on $16,283$ early-type galaxies (ETGs) in $0.025\le z_\mathrm{spec}<0.055$ from Sloan Digital Sky Survey data, we show that the fundamental plane (FP) of ETGs is not a plane in the strict sense but is a curved surface with a twisted…

Astrophysics of Galaxies · Physics 2022-09-07 Yongmin Yoon , Changbom Park

One of the major challenges in modern astrophysics is to understand the origin and the evolution of galaxies, the bright, massive early type galaxies (ETGs) in particular. Therefore, these galaxies are likely to be good probes of galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Rosaria Tantalo , Simonetta Chinellato , Emiliano Merlin , Lorenzo Piovan , Cesare Chiosi

Cosmological simulations predict that early-type galaxies (ETGs) are the results of extended mass accretion histories. The latter are characterized by different numbers of mergers, mergers mass ratios and gas fractions, and timing.…

Astrophysics of Galaxies · Physics 2020-05-20 Magda Arnaboldi , Claudia Pulsoni , Ortwin Gerhard , ePN. S team

Context: Using the Illustris-1 and IllustrisTNG-100 simulations we investigate the properties of the Fundamental Plane (FP), that is the correlation between the effective radius Re, the effective surface intensity Ie and the central stellar…

Astrophysics of Galaxies · Physics 2024-04-25 Mauro D'Onofrio , Cesare Chiosi

[ABRIDGED] We aim to provide a holistic view on the typical size and kinematic evolution of massive early-type galaxies (ETGs), that encompasses their high-$z$ star-forming progenitors, their high-$z$ quiescent counterparts, and their…

Astrophysics of Galaxies · Physics 2018-05-18 A. Lapi , L. Pantoni , L. Zanisi , J. Shi , C. Mancuso , M. Massardi , F. Shankar , A. Bressan , L. Danese

The mean alpha-to-iron abundance ratio ([$\alpha$/Fe]) of galaxies is sensitive to the chemical evolution processes at early time, and it is an indicator of star formation timescale ($\tau_{{\rm SF}}$). Although the physical reason remains…

Astrophysics of Galaxies · Physics 2016-10-05 Yiqing Liu , Luis C. Ho , Eric Peng

Context: Early-type galaxies (ETGs) are divided into slow and fast rotators (FRs and SRs) according to the degree of ordered rotation of their stellar populations. Cosmological hydrodynamical simulations indicate that galaxies form as FRs…

Astrophysics of Galaxies · Physics 2023-03-29 Michal Bílek , Pierre-Alain Duc , Elisabeth Sola
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