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A small fraction of early-type galaxies (ETGs) show prolate rotation, i.e. they rotate around their long photometric axis. In simulations, certain configurations of galaxy mergers are known to produce this type of rotation. We investigate…

星系天体物理 · 物理学 2021-06-09 Ivana Ebrová , Michal Bílek , Ana Vudragović , Mustafa K. Yıldız , Pierre-Alain Duc

Observations performed in the last few years indicate that most massive early-type galaxies (ETGs) observed at redshift z>1 exhibit sizes smaller by a factor of a few than local ETGs of analogous stellar mass. We present numerical…

宇宙学与河外天体物理 · 物理学 2015-05-27 Cinthia Ragone-Figueroa , Gian Luigi Granato

The study of morphology in galaxies offers a convenient and quantitative method to measure the shapes and characteristics of galaxy light distribution that reflect the evolutionary history. For AGN-host dwarf galaxies, however, there is a…

星系天体物理 · 物理学 2025-06-09 Jie Tian , Yinghe Zhao , Xiejin Li , Jinming Bai

We present a complete analysis of the Fundamental Plane of early-type galaxies (ETGs) in the nearby universe. The sample, as defined in paper I, comprises 39,993 ETGs located in environments covering the entire domain in local density (from…

宇宙学与河外天体物理 · 物理学 2015-05-14 F. La Barbera , R. R. de Carvalho , I. G. de la Rosa , P. A. A. Lopes

We use a complete sample of 211 nearby (z<0.08) dwarf (10^8 MSun < Mstar < 10^9.5 Msun) galaxies in low-density environments, to study their structural properties: effective radii (R_e), effective surface brightnesses (mu_e) and colour…

星系天体物理 · 物理学 2024-09-05 Ilin Lazar , Sugata Kaviraj , Aaron E. Watkins , Garreth Martin , Brian Bichang'a , Ryan A. Jackson

In this letter, we investigate the impact of environment on integrated and spatially-resolved stellar kinematics of a sample of massive, quiescent galaxies at intermediate redshift ($0.6<z<1.0$). For this analysis, we combine photometric…

Using data drawn from the DEEP2 and DEEP3 Galaxy Redshift Surveys, we investigate the relationship between the environment and the structure of galaxies residing on the red sequence at intermediate redshift. Within the massive (10 <…

The environment is known to affect the formation and evolution of galaxies considerably best visible through the well-known morphology-density relationship. We study the effect of environment on the evolution of early-type galaxies for a…

宇宙学与河外天体物理 · 物理学 2015-05-27 Daniel Thomas

We investigate the evolution of dark matter halo spin alignments with respect to cosmic filaments, exploring how halo mass, proximity to filaments, and major mergers influence their orientation over time. We perform a suite of dark…

星系天体物理 · 物理学 2026-04-01 David Tobar , Rory Smith , Antonio Montero-Dorta , Katarina Kraljic , Pablo López

We analyze the evolution of colour gradients predicted by the hydrodynamical models of early type galaxies (ETGs) in Pipino et al. (2008), which reproduce fairly well the chemical abundance pattern and the metallicity gradients of local…

宇宙学与河外天体物理 · 物理学 2015-06-16 C. Tortora , A. Pipino , A. D'Ercole , N. R. Napolitano , F. Matteucci

We report on a uniform comparative analysis of the fundamental parameters of early-type galaxies at z~1 down to a well defined magnitude limit (M_B\leq -20.0 in the field and M_B\leq -20.5 in the clusters). The changes in the M/L_B ratio…

天体物理学 · 物理学 2011-02-11 Sperello di Serego Alighieri , Barbara Lanzoni , Inger Jorgensen

We have recently suggested that the combination of the scalar virial theorem ($M_s \sim R_e \sigma^2$) and the $L=L'_0 \sigma^\beta(t)$ law, with L'_0 and $\beta$ changing from galaxy to galaxy (and with time), can provide a new set of…

星系天体物理 · 物理学 2023-06-28 Mauro D'Onofrio , Cesare Chiosi

The effect of massive neutrinos on the evolution of the early type galaxies (ETGs) in size ($R_{e}$) and stellar mass ($M_{\star}$) is explored by tracing the merging history of galaxy progenitors with the help of the robust semi-analytic…

宇宙学与河外天体物理 · 物理学 2015-06-05 Hyunmi Song , Jounghun Lee

We explore the isothermal total density profiles of early-type galaxies (ETGs) in the IllustrisTNG simulation. For the selected 559 ETGs at $z = 0$ with stellar mass $10^{10.7}\mathrm{M}_{\odot} \leqslant M_{\ast} \leqslant…

We study the formation of early-type galaxies (ETGs) through mergers with a sample of 70 high-resolution numerical simulations of binary mergers of disc galaxies. These simulations encompass various mass ratios, initial conditions and…

We present the stellar mass-size relations for elliptical, lenticular, and spiral galaxies in the field and cluster environments using HST/ACS imaging and data from the Space Telescope A901/2 Galaxy Evolution Survey (STAGES). We use a large…

Abridged - We quantify the effect of the galaxy group environment (for 12.5 < log(M_group/Msun) < 14.0) on the star formation rates of the (morphologically-selected) population of disk-dominated local Universe spiral galaxies (z < 0.13)…

A key unresolved question is the role that galaxy mergers play in driving stellar mass growth over cosmic time. Recent observational work hints at the possibility that the overall contribution of `major' mergers (mass ratios $\gtrsim$1:4)…

星系天体物理 · 物理学 2017-09-07 G. Martin , S. Kaviraj , J. E. G. Devriendt , Y. Dubois , C. Laigle , C. Pichon

According to a popular scenario supported by numerical models, the mass assembly and growth of massive galaxies, in particular the Early-Type Galaxies (ETGs), is, below a redshift of 1, mainly due to the accretion of multiple gas--poor…

宇宙学与河外天体物理 · 物理学 2015-06-15 Pierre-Alain Duc