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We explore stellar population properties separately in the bulge and the disk of double-component cluster galaxies to shed light on the formation of lenticular galaxies in dense environments. We study eight low-redshift clusters from the…

Radial trends of stellar populations in galaxies provide a valuable tool to understand the mechanisms of galaxy growth. In this paper, we present the first comprehensive analysis of optical-optical and optical-NIR colours, as a function of…

宇宙学与河外天体物理 · 物理学 2015-06-11 F. La Barbera , I. Ferreras , R. R. de Carvalho , G. Bruzual , S. Charlot , A. Pasquali , E. Merlin

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 investigated the stellar population properties of a sample of 1858 massive compact galaxies (MCGs) extracted from the SDSS survey. Motivated by previous results showing that older compact galaxies tend to have larger velocity dispersion…

星系天体物理 · 物理学 2024-05-07 K. Slodkowski Clerici , A. Schnorr-Müller , M. Trevisan , T. V. Ricci

The evolution of galaxies is imprinted in their stellar populations. Several stellar population properties in massive early-type galaxies have been shown to correlate with intrinsic galaxy properties like the galaxy's central velocity…

星系天体物理 · 物理学 2021-12-22 A. Feldmeier-Krause , I. Lonoce , W. L. Freedman

We investigate the Mg-sigma and <Fe>-sigma relations in a sample of 72 early-type galaxies drawn mostly from cluster and group environments using a homogeneous data-set which is well-calibrated onto the Lick/IDS system. The small intrinsic…

天体物理学 · 物理学 2015-06-24 Harald Kuntschner , John R. Lucey , Russell J. Smith , Michael J. Hudson , Roger L. Davies

We present the results of a study of stellar population properties at large galactocentric radii of 14 low-mass early-type galaxies in the Fornax and Virgo clusters. We derive radial profiles of Age, total metallicity [Z/H], and [alpha/Fe]…

宇宙学与河外天体物理 · 物理学 2015-05-19 Max Spolaor , Chiaki Kobayashi , Duncan A. Forbes , Warrick J. Couch , George K. T. Hau

This is the second paper of a series devoted to study the stellar content of early-type galaxies. The goal of the series is to set constraints on the evolutionary status of these objects. We use a new set of models which include an improved…

天体物理学 · 物理学 2009-11-11 P. Sanchez-Blazquez , J. Gorgas , N. Cardiel , J. J. Gonzalez

We explore a sample of 1492 galaxies with measurements of the mean stellar population properties and the spin parameter proxy, $\lambda_{R_{\rm{e}}}$, drawn from the SAMI Galaxy Survey. We fit a global $\left[\alpha/\rm{Fe}\right]$-$\sigma$…

The metallicity and its relationship with other galactic properties is a fundamental probe of the evolution of galaxies. In this work, we select about 750,000 star-forming spatial pixels from 1122 blue galaxies in the MaNGA survey to…

The stellar populations of galaxies hold vital clues to their formation histories. In this paper we present results based on modeling stacked spectra of early-type galaxies drawn from the Sloan Digital Sky Survey (SDSS) as a function of…

宇宙学与河外天体物理 · 物理学 2015-06-15 Charlie Conroy , Genevieve Graves , Pieter van Dokkum

The age and chemical composition of the stars in present-day galaxies carry important clues about their star formation processes. The latest generation of population synthesis models have allowed to derive age and stellar metallicity…

宇宙学与河外天体物理 · 物理学 2015-05-14 Anna Gallazzi

Interpreting the scaling relations followed by galaxies is a fundamental tool for assessing how well we understand galaxy formation and evolution. Several scaling relations involving the galaxy metallicity have been discovered through the…

We define a volume limited sample of over 14,000 early-type galaxies (ETGs) selected from data release six of the Sloan Digital Sky Survey. The density of environment of each galaxy is robustly measured. By comparing narrow band spectral…

天体物理学 · 物理学 2009-11-13 M. S. Clemens , A. Bressan , B. Nikolic , R. Rampazzo

The 6dF Galaxy Survey provides a very large sample of galaxies with reliable measurements of Lick line indices and velocity dispersions. This sample can be used to explore the correlations between mass and stellar population parameters such…

天体物理学 · 物理学 2008-01-08 Matthew Colless , Heath Jones , Rob Proctor , Craig Harrison , Lachlan Campbel , Philip Lah

Spectroscopic studies of elliptical galaxies show that their stellar population ages, mean metallicity, and $\alpha$-enhancement traced by [Mg/Fe] all increase with galaxy stellar mass or velocity dispersion. We use one-zone galactic…

We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. The clusters cover a mass range of 14.2<log(M_200/M_odot)<15.2 and…

We exploit recent constraints on the ages and metallicities of early-type galaxies in the Sloan Digital Sky Survey (SDSS) to gain new insight into the physical origin of two fundamental relations obeyed by these galaxies: the…

天体物理学 · 物理学 2009-11-11 A. Gallazzi , S. Charlot , J. Brinchmann , S. D. M. White

Major progress has been achieved in recent years in mapping the properties of passively-evolving, early-type galaxies (ETG) from the local universe all the way to redshift ~2. Here, age and metallicity estimates for local cluster and field…

天体物理学 · 物理学 2011-02-11 Alvio Renzini