Timing the formation and assembly of early-type galaxies via spatially resolved stellar populations analysis

  title={Timing the formation and assembly of early-type galaxies via spatially resolved stellar populations analysis},
  author={Ignacio Mart{\'i}n-Navarro and Alexandre Vazdekis and Jes{\'u}s Falc{\'o}n-Barroso and Francesco La Barbera and Akın Yıldırım and Glenn van de Ven},
  journal={Monthly Notices of the Royal Astronomical Society},
To investigate star formation and assembly processes of massive galaxies, we present here a spatially-resolved stellar populations analysis of a sample of 45 elliptical galaxies (Es) selected from the CALIFA survey. We find rather flat age and [Mg/Fe] radial gradients, weakly dependent on the effective velocity dispersion of the galaxy within half-light radius. However, our analysis shows that metallicity gradients become steeper with increasing galaxy velocity dispersion. In addition, we have… 

Stellar Population and Elemental Abundance Gradients of Early-type Galaxies

The evolution of galaxies is imprinted on their stellar populations. Several stellar population properties in massive early-type galaxies have been shown to correlate with intrinsic galaxy properties

Insights into formation scenarios of massive early-type galaxies from spatially resolved stellar population analysis in CALIFA

We perform spatially resolved stellar population analysis for a sample of 69 early-type galaxies (ETGs) from the CALIFA integral field spectroscopic survey, including 48 ellipticals and 21 S0’s. We

Inverse stellar population age gradients of post-starburst galaxies at z = 0.8 with LEGA-C

We use deep, spatially resolved spectroscopy from the Large Early Galaxy Astrophysics Census Survey to study radial variations in the stellar population of 17 spectroscopically selected

Signatures of Stellar Accretion in MaNGA Early-type Galaxies

The late assembly of massive galaxies is thought to be dominated by stellar accretion in their outskirts (beyond two effective radii Re) due to dry, minor galaxy mergers. We use observations of 1010

Eight luminous early-type galaxies in nearby pairs and sparse groups. I. Stellar populations spatially analysed

We present a detailed spatial analysis of stellar populations based on long-slit optical spectra in a sample of eight luminous early-type galaxies selected from nearby sparse groups and pairs, three

Young stellar population gradients in central cluster galaxies from NUV and optical spectroscopy

Central cluster galaxies are the largest and most massive galaxies in the Universe. Although they host very old stellar populations, several studies found the existence of blue cores in some BCGs

The Dramatic Size and Kinematic Evolution of Massive Early-type Galaxies

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

IMF radial gradients in most massive early-type galaxies

Using new long-slit spectroscopy obtained with X-Shooter at ESO-VLT, we study, for the first time, radial gradients of optical and near-infrared initial mass function (IMF)-sensitive features in a

SDSS-IV MaNGA: Global and local stellar population properties of elliptical galaxies

Context. We study the spatially resolved properties of 343 elliptical galaxies with the Mapping Nearby Galaxies at the Apache Point Observatory (MaNGA) survey. Aims. Our goal is to understand the

Gravitational Potential and Surface Density Drive Stellar Populations. II. Star-forming Galaxies

Stellar population parameters correlate with a range of galaxy properties, but it is unclear which relations are causal and which are the result of another underlying trend. In this series, we



Formation and evolution of dwarf elliptical galaxies – II. Spatially resolved star formation histories

We present optical Very Large Telescope spectroscopy of 16 dwarf elliptical galaxies (dEs) comparable in mass to NGC 205, and belonging to the Fornax cluster and to nearby groups of galaxies. Using

The formation history of elliptical galaxies

We take advantage of the largest high-resolution simulation of cosmic structure growth ever carried out - the Millennium Simulation of the concordancecold dark matter (CDM) cosmogony - to study how


We compute the properties of a sample of 221 local, early-type galaxies with a spectral energy distribution (SED) modeling software, CIGALEMC. Concentrating on the star-forming (SF) activity and dust

The hierarchical formation of the brightest cluster galaxies

We use semi-analytic techniques to study the formation and evolution of brightest cluster galaxies (BCGs). We show the extreme hierarchical nature of these objects and discuss the limitations of

Morphological Evolution and the Ages of Early-Type Galaxies in Clusters

Morphological and spectroscopic studies of high-redshift clusters indicate that a significant fraction of present-day, early-type galaxies was transformed from star-forming galaxies at z < 1. On the

The MASSIVE Survey II: Stellar Population Trends Out to Large Radius in Massive Early Type Galaxies

We examine stellar population gradients in ∼100 massive early-type galaxies spanning 180 < &sgr; * < 370 ?> km s−1 and MK of −22.5 to −26.5 mag, observed as part of the MASSIVE survey. Using

Spatially resolved spectroscopy of early-type galaxies over a range in mass

Long-slit spectra have been obtained with the Keck telescope for a sample of 11 early-type galaxies covering a wide range in luminosity and hence mass. Rotation velocity and velocity dispersions,

The origin of the α-enhancement of massive galaxies

We study the origin of the stellar α-element-to-iron abundance ratio, [α/Fe]*, of present-day central galaxies, using cosmological, hydrodynamical simulations from the Evolution and Assembly of


We analyze 40 cosmological re-simulations of individual massive galaxies with present-day stellar masses of M* > 6.3 × 1010 M☉ in order to investigate the physical origin of the observed strong

The formation of massive, compact galaxies at z = 2 in the Illustris simulation

Massive, quiescent galaxies at high redshift have been found to be considerably more compact than galaxies of similar mass in the local universe. How these compact galaxies formed has yet to be